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Hunt Bike Wheels 42 Limitless Gravel
Hunt Bike Wheels 42 Limitless Gravel
Hunt Bike Wheels 42 Limitless Gravel
<h1>WIND TUNNEL TESTED</h1><i> Developed by HUNT's in-house engineering team, with years in the wind tunnel spent testing every last detail. We've left no stone unturned in designing this wheelset from the ground up to be very fastest in the world within its class.</i>
<h1>Wind tunnel proven</h1><i>Proven to offer the lowest aerodynamic drag among tested gravel-specific wheelsets under 50mm depth, offering the rider up to .12 Watt savings over renowned competitors, and 16.8 Watt savings over non-aero gravel wheels</i>
<h1>Tyre Compatability</h1><i>Designed around a 24.5mm internal rim width optimized aerodynamically for 38-42c gravel tyres but will work with any tyre up to 54c. Also works excellently with clincher tyres and tubes. They feature a hooked tyre retention design and are both fully ETRTO-compatible and tubeless-ready.</i>
<h1>Wing Spokes</h1><i>After considerable testing across multiple spoke types (including analysis against competitor spokes), we found that the aerofoil profile of Pillar's Wing spokes offer even further aerodynamic advantages over flat/bladed options.</i>
<h1>Patented Limitless Technology</h1><i>In order to create the most aerodynamic & stable shape for the tyre, a rim bed of 24.5mm is needed. With the tyre profile this creates, the ideal shape of the rim curves out to an external width of 36mm. To overcome the weight penalty associated with this, we use a (non-structural) low density expanding polymer insert, inside a channel carved out during pre-preg.</i>
<h1>Patented Limitless Technology</h1><i>This is bonded to the carbon during the curing process, resulting in an exceptionally strong bond. The density of carbon is 1.6g per cubic centimeter, whereas the polymer inserts weigh just 0.7g per cubic centimeter, resulting in a (rotational) mass loss of just over 50g per rim. This patented technology enables us to consider the limits of material properties, and smash right past them. </i>
<h1>CeramicSpeed Coated Bearings</h1><i>The 42 Limitless Gravel will come fully equipped with CeramicSpeed's coated bearings are a further 75% tougher than their standard hardened steel races, and it's this enhanced strength that makes for a bearing solution that boasts an average lifetime 7.5 times longer than other non-coated solutions. CeramicSpeed’s coated bearing solutions are designed and tested extensively to ensure that failure due to corrosion is negligible.</i>
<h1>Freehub Body</h1><i>Featuring 3 multi-point pawls with 3 teeth each and a 48t ratchet ring. The result an impressively low 7.5 deg engagement angle. Durability is a theme for HUNT, and so all our freehub bodies have Steel Spline Insert re-enforcements to provide excellent durability against cassette sprocket damage often seen on standard alloy freehub bodies. Includes 2 CeramicSpeed bearings in the body.</i>
<h1>Nipples</h1><i>Despite designing a wheelset with aerodynamic supremacy in mind, serviceability and usability has always been a core philosophy of how we put wheels together. External spoke nipples are absolutely the right choice with this in mind, especially when running tubeless tires as you would have to remove the tubeless tape to access the nipples were, they to be internal.</i>
<h1>In the Box</h1><ul><li>HUNT Black Shield tubeless tape fitted to wheels.</li><li>The axle adapters needed for your bike, just fill in the simple form shown after order completion, the form is also included in your order confirmation page.</li><li>Cassette spacer for 8/9/10 speed</li><li>Tubeless Valves</li><li>Spare of each spoke plus nipples</li><li>Quality control card signed by your wheel builder</li></ul>
Hunt Bike Wheels 42 Limitless Gravel

HUNT 42 Limitless Gravel Aero Wheelset

42 Deep | 36 Wide Ext | 25 Wide Int | 1548g | CeramicSpeed

Aerodynamically optimised for maximum speed & crosswind stability

42 DEEP | 36 WIDE EXT | 25 WIDE INT | 1548G | CERAMICSPEED

The Purpose

With the 42 Limitless Gravel Aero, HUNT set out to develop the premier performance gravel wheelset, optimising gravel-specific aerodynamics through patented Limitless technology, and balancing those against another critically important attribute for riders moving fast over inconsistent surfaces: crosswind stability (steering moment). The recent proliferation of gravel races across the globe means riders are now rethinking their equipment selections and employing aerodynamically designed skinsuits, helmets, frames and wheels.

With industry-leading engineering and design talent in-house, HUNT aims to set a new standard for gravel-specific wheel performance.

H_CARE Logo

Includes FREE H_Care lifetime crash replacement for the first owners of these wheels. Read all about it here.

Wind Tunnel Proven

The wind tunnel data we recorded is shown against the full range of world-class aero wheels. The results below depict HUNT's standing among the range (the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).
Further results are shown in the white paper attached; the 42 Limitless Gravel wheelset offers riders the benefit of industry-leading aerodynamics ahead of industry incumbents but balanced against the clearly superior stability as measured above.

Full Wind Tunnel Tests

As a general rule, when comparing two aerodynamically profiled rims, deeper shapes will provide greater aerodynamic benefits. When studying equipment choices at premier gravel events, it was apparent that riders generally favoured shallower rims, presumably to achieve light weight, compliant ride characteristics and crosswind stability; all at the expense of substantive aerodynamic gains. The vibrational losses associated with deep rim profiles, along with the energy lost fighting hours of crosswinds, can cause fatigue over long racing distances. After testing a number of shapes and depths, HUNT identified the opportunity to develop the ideal solution: an extra-wide, aerodynamically optimised 42mm profile with outstanding crosswind performance and low relative weight.

Understanding Crosswind Stability

During testing, we monitor various elements of aerodynamic performance, including side forces that act on the rims, and the effect those forces have on the steering moment (a tool for measuring crosswind stability). As with our previous projects, our wheels are tested through a range of effective yaw angles between negative 20 degrees and positive 20 degrees.

In real world riding conditions, wind does not distribute forces evenly. The frequency of effective yaw angles experienced by a rider follows Gaussian distribution (bell curve), based on the variables of wind direction and speed, as well as rider direction and speed. Simply stated, low yaw angles have a greater probability of occurring in real world riding conditions than high yaw angles. According to well-referenced data from scientific and industry sources, "a vehicle will spend at least 70% of the time at yaw angles below 10 degrees." (Cooper, 2003). In the context of riding, the rider will spend approximately 42 minutes experiencing yaw angles between negative and positive 10 degrees over the course of an average one-hour ride.

In the chart below, the steering moment is tracked on the Y-axis, while the Yaw Angle is tracked on the X-axis. A flatter curve across the X-axis represents less impact on the rider's steering and stability. We are able to deduce from these results that the 42 Limitless Gravel has the smoothest steering moment relative to the other wheels tested. Whether descending or going flat out on unsheltered roads, the rider will spend less energy fighting against crosswinds, leading to a faster, more comfortable, and more efficient ride.





Wind Tunnel Data

The wind tunnel results below depict the performance of HUNT 42 Limitless Gravel Aero wheels among a range of world class aero wheels commonly used in competitive gravel racing. The data suggests that the HUNT 42 Limitless Gravel Aero is the most aerodynamic gravel wheelset, offering the rider a small power gain of 0.05W, or 6 seconds of advantage when compared to the next best ranked offering over the course of a 200-mile race averaging a speed of 32 km/h and power output of 317W (Note: the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).

With the use of patented Limitless construction, HUNT was able to create a wheelset that offers an extremely wide rim profile with a truncated edge (blunted spoke bed) to help airflow remain attached to the system, while maintaining low overall weight and providing day-in and day-out performance and durability on the harshest gravel roads.

HUNT 42 Limitless Gravel Disc Schwalbe G-One Wind Tunnel Data

HUNT 42 Limitless Gravel Disc Teravail Cannonball Wind Tunnel Data

The wind tunnel data HUNT recorded is shown against the full range of reputable aero wheels in the chart below. The results below depict the performance of the 42 Limitless Gravel Aero wheelset among the range.

Using the aerodynamic force data from wind tunnel testing sessions, it is possible to calculate the average aerodynamic power to derive the time needed to cover a certain distance. In this case, the authors have calculated the time loss based on 200-mile race.

When it comes to quantifying performance, the use of Power (Watts) has become the norm, calculated in its simplest form, this is:

𝑃 = 𝐹𝑣 (1)
Where,
F = force acting against the forward motion
v = velocity of object

The Aerodynamic Force to overcome drag obtained from the wind tunnel being:
𝐹d = (p * cd * v2 * A) / (2)
p = density of fluid
Cd = coefficient of drag
A = reference Area (often frontal area)
However, the power required to maintain a rider’s speed is dependent on many other forces:
π‘‡π‘œπ‘‘π‘Žπ‘™ π‘ƒπ‘œπ‘€π‘’π‘Ÿ = 𝑃! (π‘‘π‘Ÿπ‘Žπ‘”) + 𝑃) (π‘Ÿπ‘œπ‘™π‘™π‘–π‘›π‘” π‘Ÿπ‘’π‘ π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’) + 𝑃* (π‘“π‘Ÿπ‘–π‘π‘‘π‘–π‘œπ‘›) + 𝑃+ (π‘ π‘™π‘œπ‘π‘’) + 𝑃, (π‘Žπ‘π‘π‘’π‘™π‘’π‘Ÿπ‘Žπ‘‘π‘–π‘œπ‘›) (3)

This is now a complicated equation that is very dependent on the conditions and not possible to solve from wind tunnel data alone.

Calculation of Power and Time Loss
Hyp: a 32km/h (8.88 m/s in S.I. units) speed is considered and a professional rider producing an average power of 317W over the 200 mile (321 km in S.I. Units) Unbound Gravel Course.
Therefore, the propulsive force on the pedals is:
𝑃=317 π‘Š
𝐹= 𝑃𝑣= 3178.88=35.7𝑁 (1)
In terms of grams of force 1g = 0.00981 N, so:

36 𝑁=3638,96 𝑔
Assuming aerodynamic drag (Fd from wind tunnel results) as the only resistive force, the propulsive force (Ftot) to maintain the rider’s speed can be calculated using:

Ftot = Ξ”Fd + F (4)
The values of F and P are now known. Therefore, by manipulating equation (1) it is possible to calculate the time it would take to complete 321 km:

𝑃=𝐹 𝑣=πΉπ‘‘π‘œπ‘‘βˆ— 𝑠 / 𝑑

𝑑= (πΉπ‘‘π‘œπ‘‘βˆ—π‘ ) / 𝑃
Where s is the distance (m)

Read Less

The Purpose

With the 42 Limitless Gravel Aero, HUNT set out to develop the premier performance gravel wheelset, optimising gravel-specific aerodynamics through patented Limitless technology, and balancing those against another critically important attribute for riders moving fast over inconsistent surfaces: crosswind stability (steering moment). The recent proliferation of gravel races across the globe means riders are now rethinking their equipment selections and employing aerodynamically designed skinsuits, helmets, frames and wheels.

With industry-leading engineering and design talent in-house, HUNT aims to set a new standard for gravel-specific wheel performance.

H_CARE Logo

Includes FREE H_Care lifetime crash replacement for the first owners of these wheels. Read all about it here.

Wind Tunnel Proven

The wind tunnel data we recorded is shown against the full range of world-class aero wheels. The results below depict HUNT's standing among the range (the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).
Further results are shown in the white paper attached; the 42 Limitless Gravel Aero wheelset offers riders the benefit of industry-leading aerodynamics ahead of industry incumbents but balanced against the clearly superior stability as measured above.

Full Wind Tunnel Tests

As a general rule, when comparing two aerodynamically profiled rims, deeper shapes will provide greater aerodynamic benefits. When studying equipment choices at premier gravel events, it was apparent that riders generally favoured shallower rims, presumably to achieve light weight, compliant ride characteristics and crosswind stability; all at the expense of substantive aerodynamic gains. The vibrational losses associated with deep rim profiles, along with the energy lost fighting hours of crosswinds, can cause fatigue over long racing distances. After testing a number of shapes and depths, HUNT identified the opportunity to develop the ideal solution: an extra-wide, aerodynamically optimised 42mm profile with outstanding crosswind performance and low relative weight.

Understanding Crosswind Stability

During testing, we monitor various elements of aerodynamic performance, including side forces that act on the rims, and the effect those forces have on the steering moment (a tool for measuring crosswind stability). As with our previous projects, our wheels are tested through a range of effective yaw angles between negative 20 degrees and positive 20 degrees.

In real world riding conditions, wind does not distribute forces evenly. The frequency of effective yaw angles experienced by a rider follows Gaussian distribution (bell curve), based on the variables of wind direction and speed, as well as rider direction and speed. Simply stated, low yaw angles have a greater probability of occurring in real world riding conditions than high yaw angles. According to well-referenced data from scientific and industry sources, "a vehicle will spend at least 70% of the time at yaw angles below 10 degrees." (Cooper, 2003). In the context of riding, the rider will spend approximately 42 minutes experiencing yaw angles between negative and positive 10 degrees over the course of an average one-hour ride.

In the chart below, the steering moment is tracked on the Y-axis, while the Yaw Angle is tracked on the X-axis. A flatter curve across the X-axis represents less impact on the rider's steering and stability. We are able to deduce from these results that the 42 Limitless Gravel has the smoothest steering moment relative to the other wheels tested. Whether descending or going flat out on unsheltered roads, the rider will spend less energy fighting against crosswinds, leading to a faster, more comfortable, and more efficient ride.





Wind Tunnel Data

The wind tunnel results below depict the performance of HUNT 42 Limitless Gravel Aero wheels among a range of world class aero wheels commonly used in competitive gravel racing. The data suggests that the HUNT 42 Limitless Gravel Aero is the most aerodynamic gravel wheelset, offering the rider a small power gain of 0.05W, or 6 seconds of advantage when compared to the next best ranked offering over the course of a 200-mile race averaging a speed of 32 km/h and power output of 317W (Note: the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).

With the use of patented Limitless construction, HUNT was able to create a wheelset that offers an extremely wide rim profile with a truncated edge (blunted spoke bed) to help airflow remain attached to the system, while maintaining low overall weight and providing day-in and day-out performance and durability on the harshest gravel roads.

HUNT 42 Limitless Gravel Disc Schwalbe G-One Wind Tunnel Data

HUNT 42 Limitless Gravel Disc Teravail Cannonball Wind Tunnel Data

The wind tunnel data HUNT recorded is shown against the full range of reputable aero wheels in the chart below. The results below depict the performance of the 42 Limitless Gravel wheelset Aero among the range.

Using the aerodynamic force data from wind tunnel testing sessions, it is possible to calculate the average aerodynamic power to derive the time needed to cover a certain distance. In this case, the authors have calculated the time loss based on 200-mile race.

When it comes to quantifying performance, the use of Power (Watts) has become the norm, calculated in its simplest form, this is:

𝑃 = 𝐹𝑣 (1)
Where,
F = force acting against the forward motion
v = velocity of object

The Aerodynamic Force to overcome drag obtained from the wind tunnel being:
𝐹d = (p * cd * v2 * A) / (2)
p = density of fluid
Cd = coefficient of drag
A = reference Area (often frontal area)
However, the power required to maintain a rider’s speed is dependent on many other forces:
π‘‡π‘œπ‘‘π‘Žπ‘™ π‘ƒπ‘œπ‘€π‘’π‘Ÿ = 𝑃! (π‘‘π‘Ÿπ‘Žπ‘”) + 𝑃) (π‘Ÿπ‘œπ‘™π‘™π‘–π‘›π‘” π‘Ÿπ‘’π‘ π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’) + 𝑃* (π‘“π‘Ÿπ‘–π‘π‘‘π‘–π‘œπ‘›) + 𝑃+ (π‘ π‘™π‘œπ‘π‘’) + 𝑃, (π‘Žπ‘π‘π‘’π‘™π‘’π‘Ÿπ‘Žπ‘‘π‘–π‘œπ‘›) (3)

This is now a complicated equation that is very dependent on the conditions and not possible to solve from wind tunnel data alone.

Calculation of Power and Time Loss
Hyp: a 32km/h (8.88 m/s in S.I. units) speed is considered and a professional rider producing an average power of 317W over the 200 mile (321 km in S.I. Units) Unbound Gravel Course.
Therefore, the propulsive force on the pedals is:
𝑃=317 π‘Š
𝐹= 𝑃𝑣= 3178.88=35.7𝑁 (1)
In terms of grams of force 1g = 0.00981 N, so:

36 𝑁=3638,96 𝑔
Assuming aerodynamic drag (Fd from wind tunnel results) as the only resistive force, the propulsive force (Ftot) to maintain the rider’s speed can be calculated using:

Ftot = Ξ”Fd + F (4)
The values of F and P are now known. Therefore, by manipulating equation (1) it is possible to calculate the time it would take to complete 321 km:

𝑃=𝐹 𝑣=πΉπ‘‘π‘œπ‘‘βˆ— 𝑠 / 𝑑

𝑑= (πΉπ‘‘π‘œπ‘‘βˆ—π‘ ) / 𝑃
Where s is the distance (m)

Read Less

Key Features

    • Wind tunnel proven to offer the lowest aerodynamic drag among tested gravel-specific wheelsets under 50mm depth, offering the rider up to .12 Watt savings over renowned competitors, and 16.8 Watt savings over non-aero gravel wheels.
    • Rims | 700c Designed by HUNT's in-house engineering team, HUNT Limitless Technology delivers industry-leading cross wind stability verified by smooth steering moment data proven in wind tunnel testing. 25mm internal and 36mm external widths, and a 42mm u-shape profile.
    • Bearings | Featuring CeramicSpeed's world-renowned low-friction Coated Bearings, designed for off road use. These coated bearings are a further 75% tougher than their standard hardened steel races, and boast an average lifetime 7.5 times longer than other non-coated solutions. EZO bearing option also available.
    • Tyres | Designed around a 25mm internal rim width optimised aerodynamically for 38-42c gravel tyres. Feature a hooked tyre retention design for safety, fully ETRTO-compliant and tubeless-ready. To see recommended widths and pressures, see full specs here.
    • Hubs | New Sprint SL straight-pull center lock hubs. 15mm diameter 6066-T6 body and axle for supreme strength-to-weight. Circular dropout interface steps for added security in fitment. 3x treble-tooth pawls, resulting in just 7.5˚ engagement. Steel spline inserts to protect the cassette body.

      Please note: If you require a 6-bolt adapter you can purchase separately here.

    • Elliptical Wing Spokes | Pillar Wing spokes with aerofoil profile. Tested and proven to provide aerodynamic advantage over flat or bladed options both from Pillar and other competitors.
    • Axles | Easily adaptable & we fit them for you. Fit all current axle sizes and are easy to change. Click here to see all axle sizes.
    • Hand-built | All of our wheels are built and finished by hand, inclusive of a full quality control inspection.
    • Included | Tubeless tape & valves, spare spokes, axle adapters (please fill in the simple form after checkout to select your required size).
    • Weight | 1548g
    • See the full specs here

The Experts' View

Cycling News Recommends review Bicycling Australia LogoPeloton Magazine Logo

Full Specs

  • Rims

    • Wind tunnel tested, aerodynamically optimised for 38-42c tyres
    • Hooked
    • H-lock bead-seat up-kicks for easy and secure tubeless installation
    • Unidirectional T24/30 carbon fiber with 3K weave re-enforced spoke holes
    • 36mm outer and 24.5mm inner width
    • 42mm depth
    • Matt black base finished with matt white contrasting graphics

  • Spokes

    • Pillar Wing with Aerofoil
    • 24 front and 24 rear interlaced
    • Aero Butted 2.0-2.2/0.95-2.0 then PSR section is 2.2
    • Straight-pull for excellent torsional strength and direct power transfer
    • Cold drawn from high grade T302 (18/10) stainless steel wire by Sandvik Sweden
    • Patented Pillar Spoke Re-enforcement, butted again just before the spoke head providing more durability in high stress area
    • Black stainless treatment

  • Nipples

    • Alloy square body for external adjustment and square head for easy internal adjustment/tensioning.
    • 16mm length with washer for a strong connection to the spoke added durability
    • 14 gauge
    • Black anodized finish

  • Tyres Info

      • HUNT recommends a 38-42mm tyre for best performance, tyre widths between 29mm and 64mm are also safe to use.
      • You must not exceed the maximum tyre pressure limits set out in the table below or the maximum limit set by your tyre manufacturer if this is lower.
      • Note: best performance is usually gained by using tyre pressures lower than the maximum, you can see our blog post here about this.
      • Tubeless-ready for lower weight and rolling resistance.

  • Axle Sizes

    These wheels are available with all existing disc brake road bike axle adapter sizes. We fit the axles you need, just complete the simple form shown after checkout:

    • Front: 12x100mm Thru-Axle, 9x100mm Thru-Axle, Quick Release 9x100mm
    • Rear: 12x142mm Thru-Axle, 12x135mm Thru-Axle, 10x135mm Thru-Axle, Quick Release 9x135mm

    If you are unsure what size your axles are don't worry it also includes the option to tell us your bike model and we will find out and then fit the correct axles, plus we're happy to change them later at our cost if you don't quite get it right. Please note; this form is shown after you have completed your order.

  • Front Hub

      • Forged and CNC’d 6066-T6 heat treated aluminum alloy body.
      • 6066-T6 aluminum alloy axles.
    • Center-lock disc mount. If you require a 6 bolt adapter you can purchase separately here.
    • HUNT SPRINT SL Disc straight-pull super-light alloy.
    • Polished anodized black finish with laser graphics.

  • Rear Hub

      • 6066-T6 heat-treated aluminum alloy freehub body.
      • Steel Spline Insert freehub body reinforcement provides excellent durability against cassette sprocket damage to the Shimano freehub often seen on standard alloy freehub bodies.
        • 3x treble-tooth individually leaf sprung pawls with 48 teeth on the ratchet ring for fast 7.5-degree engagement and instant acceleration.
        • All freehub standards accounted for.
        • Hunt Race Season Disc straight-pull super-light alloy.
          • Forged and CNC’d 6066-T6 heat treated aluminium alloy body.
          • Center-lock disc mount. If you require a 6 bolt adapter you can purchase separately here
          • Polished anodized black finish with laser graphics.
          • Intended use: Fast and light gravel riding. For loaded gravel riding and bikepacking, please consider wheelsets featuring HUNT 4 Season hubsets.

  • Bearings

    • Industry leading CeramicSpeed ceramic coated bearings. EZO bearing option also available.
    • 75% tougher than their standard hardened steel races, boasting an average lifetime seven and a half times longer than other non-coated solutions
    • CeramicSpeed bearing balls are of the highest quality, featuring the highest achievable surface finish and roundness
    • Life-time warranty (When registered with CeramicSpeed)

    • Warranty, HUNT Rolling Road Tests & Weight Limits

    These wheels come with H_CARE (Free Lifetime Crash Replacement) for the first owners. Read all about it here.

    A full 3 years (Life-time on CeramicSpeed bearings*) from purchase date warranty is offered to the original purchaser only on all HUNT wheels against material or workmanship defects, please click here to read full details. *Must be registered with CeramicSpeed

    All HUNT wheels models have to pass our harsh cobbled-rolling-road tests for rider weight limits, please see here for more details. Max system weight 130kg (system weight – total weight of fully kitted up rider, bike and luggage). If a rider is over 105Kgs then an experienced bike mechanic should check the wheel regularly. We are cyclists ourselves and do of course go above and beyond to offer excellent service if you ever do experience any issues. We carry full spares at very reasonable prices and offer complete support.

    60 Day Ride & Return Period. We are certain you'll be impressed by the acceleration, low-weight, speed and durability of our wheels. We are cyclists and as such strive to offer class leading service and support. Buy with confidence, if for any reason you wish to return the wheels for a full refund of your order you can do so up to a full 60 days after you receive them whether they have been ridden or not. Please note we cannot offer refunds on wheels that have suffered from crash damage but do offer H_CARE (Free Lifetime Crash Replacement) on these wheels.

    Reviews

    Bike Magazine and Website Experts' Views

    Cycling_News_Recommends Logo

    Cycling News Recommends

    "Though you might not fully appreciate the aerodynamic benefits at all times, you will certainly appreciate the wheelset’s ability to keep your bike planted, even in strong crosswinds. This is an aero wheel for any road, and any weather."
    Bicycling Australia Logo

    Bicycling Australia 9.5/10 Review

    "Overall, we’d give the wheels 9.5/10. They're fast, versatile, strong, light, look great and roll exceptionally well."

    Aerodynamically optimised for maximum speed & crosswind stability

    42 DEEP | 36 WIDE EXT | 25 WIDE INT | 1548G | CERAMICSPEED

    The Purpose

    With the 42 Limitless Gravel Aero, HUNT set out to develop the premier performance gravel wheelset, optimising gravel-specific aerodynamics through patented Limitless technology, and balancing those against another critically important attribute for riders moving fast over inconsistent surfaces: crosswind stability (steering moment). The recent proliferation of gravel races across the globe means riders are now rethinking their equipment selections and employing aerodynamically designed skinsuits, helmets, frames and wheels.

    With industry-leading engineering and design talent in-house, HUNT aims to set a new standard for gravel-specific wheel performance.

    H_CARE Logo

    Includes FREE H_Care lifetime crash replacement for the first owners of these wheels. Read all about it here.

    Wind Tunnel Proven

    The wind tunnel data we recorded is shown against the full range of world-class aero wheels. The results below depict HUNT's standing among the range (the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).
    Further results are shown in the white paper attached; the 42 Limitless Gravel wheelset offers riders the benefit of industry-leading aerodynamics ahead of industry incumbents but balanced against the clearly superior stability as measured above.

    Full Wind Tunnel Tests

    As a general rule, when comparing two aerodynamically profiled rims, deeper shapes will provide greater aerodynamic benefits. When studying equipment choices at premier gravel events, it was apparent that riders generally favoured shallower rims, presumably to achieve light weight, compliant ride characteristics and crosswind stability; all at the expense of substantive aerodynamic gains. The vibrational losses associated with deep rim profiles, along with the energy lost fighting hours of crosswinds, can cause fatigue over long racing distances. After testing a number of shapes and depths, HUNT identified the opportunity to develop the ideal solution: an extra-wide, aerodynamically optimised 42mm profile with outstanding crosswind performance and low relative weight.

    Understanding Crosswind Stability

    During testing, we monitor various elements of aerodynamic performance, including side forces that act on the rims, and the effect those forces have on the steering moment (a tool for measuring crosswind stability). As with our previous projects, our wheels are tested through a range of effective yaw angles between negative 20 degrees and positive 20 degrees.

    In real world riding conditions, wind does not distribute forces evenly. The frequency of effective yaw angles experienced by a rider follows Gaussian distribution (bell curve), based on the variables of wind direction and speed, as well as rider direction and speed. Simply stated, low yaw angles have a greater probability of occurring in real world riding conditions than high yaw angles. According to well-referenced data from scientific and industry sources, "a vehicle will spend at least 70% of the time at yaw angles below 10 degrees." (Cooper, 2003). In the context of riding, the rider will spend approximately 42 minutes experiencing yaw angles between negative and positive 10 degrees over the course of an average one-hour ride.

    In the chart below, the steering moment is tracked on the Y-axis, while the Yaw Angle is tracked on the X-axis. A flatter curve across the X-axis represents less impact on the rider's steering and stability. We are able to deduce from these results that the 42 Limitless Gravel has the smoothest steering moment relative to the other wheels tested. Whether descending or going flat out on unsheltered roads, the rider will spend less energy fighting against crosswinds, leading to a faster, more comfortable, and more efficient ride.





    Wind Tunnel Data

    The wind tunnel results below depict the performance of HUNT 42 Limitless Gravel Aero wheels among a range of world class aero wheels commonly used in competitive gravel racing. The data suggests that the HUNT 42 Limitless Gravel Aero is the most aerodynamic gravel wheelset, offering the rider a small power gain of 0.05W, or 6 seconds of advantage when compared to the next best ranked offering over the course of a 200-mile race averaging a speed of 32 km/h and power output of 317W (Note: the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).

    With the use of patented Limitless construction, HUNT was able to create a wheelset that offers an extremely wide rim profile with a truncated edge (blunted spoke bed) to help airflow remain attached to the system, while maintaining low overall weight and providing day-in and day-out performance and durability on the harshest gravel roads.

    HUNT 42 Limitless Gravel Disc Schwalbe G-One Wind Tunnel Data

    HUNT 42 Limitless Gravel Disc Teravail Cannonball Wind Tunnel Data

    The wind tunnel data HUNT recorded is shown against the full range of reputable aero wheels in the chart below. The results below depict the performance of the 42 Limitless Gravel Aero wheelset among the range.

    Using the aerodynamic force data from wind tunnel testing sessions, it is possible to calculate the average aerodynamic power to derive the time needed to cover a certain distance. In this case, the authors have calculated the time loss based on 200-mile race.

    When it comes to quantifying performance, the use of Power (Watts) has become the norm, calculated in its simplest form, this is:

    𝑃 = 𝐹𝑣 (1)
    Where,
    F = force acting against the forward motion
    v = velocity of object

    The Aerodynamic Force to overcome drag obtained from the wind tunnel being:
    𝐹d = (p * cd * v2 * A) / (2)
    p = density of fluid
    Cd = coefficient of drag
    A = reference Area (often frontal area)
    However, the power required to maintain a rider’s speed is dependent on many other forces:
    π‘‡π‘œπ‘‘π‘Žπ‘™ π‘ƒπ‘œπ‘€π‘’π‘Ÿ = 𝑃! (π‘‘π‘Ÿπ‘Žπ‘”) + 𝑃) (π‘Ÿπ‘œπ‘™π‘™π‘–π‘›π‘” π‘Ÿπ‘’π‘ π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’) + 𝑃* (π‘“π‘Ÿπ‘–π‘π‘‘π‘–π‘œπ‘›) + 𝑃+ (π‘ π‘™π‘œπ‘π‘’) + 𝑃, (π‘Žπ‘π‘π‘’π‘™π‘’π‘Ÿπ‘Žπ‘‘π‘–π‘œπ‘›) (3)

    This is now a complicated equation that is very dependent on the conditions and not possible to solve from wind tunnel data alone.

    Calculation of Power and Time Loss
    Hyp: a 32km/h (8.88 m/s in S.I. units) speed is considered and a professional rider producing an average power of 317W over the 200 mile (321 km in S.I. Units) Unbound Gravel Course.
    Therefore, the propulsive force on the pedals is:
    𝑃=317 π‘Š
    𝐹= 𝑃𝑣= 3178.88=35.7𝑁 (1)
    In terms of grams of force 1g = 0.00981 N, so:

    36 𝑁=3638,96 𝑔
    Assuming aerodynamic drag (Fd from wind tunnel results) as the only resistive force, the propulsive force (Ftot) to maintain the rider’s speed can be calculated using:

    Ftot = Ξ”Fd + F (4)
    The values of F and P are now known. Therefore, by manipulating equation (1) it is possible to calculate the time it would take to complete 321 km:

    𝑃=𝐹 𝑣=πΉπ‘‘π‘œπ‘‘βˆ— 𝑠 / 𝑑

    𝑑= (πΉπ‘‘π‘œπ‘‘βˆ—π‘ ) / 𝑃
    Where s is the distance (m)

    Read Less

    The Purpose

    With the 42 Limitless Gravel Aero, HUNT set out to develop the premier performance gravel wheelset, optimising gravel-specific aerodynamics through patented Limitless technology, and balancing those against another critically important attribute for riders moving fast over inconsistent surfaces: crosswind stability (steering moment). The recent proliferation of gravel races across the globe means riders are now rethinking their equipment selections and employing aerodynamically designed skinsuits, helmets, frames and wheels.

    With industry-leading engineering and design talent in-house, HUNT aims to set a new standard for gravel-specific wheel performance.

    H_CARE Logo

    Includes FREE H_Care lifetime crash replacement for the first owners of these wheels. Read all about it here.

    Wind Tunnel Proven

    The wind tunnel data we recorded is shown against the full range of world-class aero wheels. The results below depict HUNT's standing among the range (the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).
    Further results are shown in the white paper attached; the 42 Limitless Gravel Aero wheelset offers riders the benefit of industry-leading aerodynamics ahead of industry incumbents but balanced against the clearly superior stability as measured above.

    Full Wind Tunnel Tests

    As a general rule, when comparing two aerodynamically profiled rims, deeper shapes will provide greater aerodynamic benefits. When studying equipment choices at premier gravel events, it was apparent that riders generally favoured shallower rims, presumably to achieve light weight, compliant ride characteristics and crosswind stability; all at the expense of substantive aerodynamic gains. The vibrational losses associated with deep rim profiles, along with the energy lost fighting hours of crosswinds, can cause fatigue over long racing distances. After testing a number of shapes and depths, HUNT identified the opportunity to develop the ideal solution: an extra-wide, aerodynamically optimised 42mm profile with outstanding crosswind performance and low relative weight.

    Understanding Crosswind Stability

    During testing, we monitor various elements of aerodynamic performance, including side forces that act on the rims, and the effect those forces have on the steering moment (a tool for measuring crosswind stability). As with our previous projects, our wheels are tested through a range of effective yaw angles between negative 20 degrees and positive 20 degrees.

    In real world riding conditions, wind does not distribute forces evenly. The frequency of effective yaw angles experienced by a rider follows Gaussian distribution (bell curve), based on the variables of wind direction and speed, as well as rider direction and speed. Simply stated, low yaw angles have a greater probability of occurring in real world riding conditions than high yaw angles. According to well-referenced data from scientific and industry sources, "a vehicle will spend at least 70% of the time at yaw angles below 10 degrees." (Cooper, 2003). In the context of riding, the rider will spend approximately 42 minutes experiencing yaw angles between negative and positive 10 degrees over the course of an average one-hour ride.

    In the chart below, the steering moment is tracked on the Y-axis, while the Yaw Angle is tracked on the X-axis. A flatter curve across the X-axis represents less impact on the rider's steering and stability. We are able to deduce from these results that the 42 Limitless Gravel has the smoothest steering moment relative to the other wheels tested. Whether descending or going flat out on unsheltered roads, the rider will spend less energy fighting against crosswinds, leading to a faster, more comfortable, and more efficient ride.





    Wind Tunnel Data

    The wind tunnel results below depict the performance of HUNT 42 Limitless Gravel Aero wheels among a range of world class aero wheels commonly used in competitive gravel racing. The data suggests that the HUNT 42 Limitless Gravel Aero is the most aerodynamic gravel wheelset, offering the rider a small power gain of 0.05W, or 6 seconds of advantage when compared to the next best ranked offering over the course of a 200-mile race averaging a speed of 32 km/h and power output of 317W (Note: the 3T Discus 45|40 was not available to test, as it was not released to the public when testing occurred).

    With the use of patented Limitless construction, HUNT was able to create a wheelset that offers an extremely wide rim profile with a truncated edge (blunted spoke bed) to help airflow remain attached to the system, while maintaining low overall weight and providing day-in and day-out performance and durability on the harshest gravel roads.

    HUNT 42 Limitless Gravel Disc Schwalbe G-One Wind Tunnel Data

    HUNT 42 Limitless Gravel Disc Teravail Cannonball Wind Tunnel Data

    The wind tunnel data HUNT recorded is shown against the full range of reputable aero wheels in the chart below. The results below depict the performance of the 42 Limitless Gravel wheelset Aero among the range.

    Using the aerodynamic force data from wind tunnel testing sessions, it is possible to calculate the average aerodynamic power to derive the time needed to cover a certain distance. In this case, the authors have calculated the time loss based on 200-mile race.

    When it comes to quantifying performance, the use of Power (Watts) has become the norm, calculated in its simplest form, this is:

    𝑃 = 𝐹𝑣 (1)
    Where,
    F = force acting against the forward motion
    v = velocity of object

    The Aerodynamic Force to overcome drag obtained from the wind tunnel being:
    𝐹d = (p * cd * v2 * A) / (2)
    p = density of fluid
    Cd = coefficient of drag
    A = reference Area (often frontal area)
    However, the power required to maintain a rider’s speed is dependent on many other forces:
    π‘‡π‘œπ‘‘π‘Žπ‘™ π‘ƒπ‘œπ‘€π‘’π‘Ÿ = 𝑃! (π‘‘π‘Ÿπ‘Žπ‘”) + 𝑃) (π‘Ÿπ‘œπ‘™π‘™π‘–π‘›π‘” π‘Ÿπ‘’π‘ π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’) + 𝑃* (π‘“π‘Ÿπ‘–π‘π‘‘π‘–π‘œπ‘›) + 𝑃+ (π‘ π‘™π‘œπ‘π‘’) + 𝑃, (π‘Žπ‘π‘π‘’π‘™π‘’π‘Ÿπ‘Žπ‘‘π‘–π‘œπ‘›) (3)

    This is now a complicated equation that is very dependent on the conditions and not possible to solve from wind tunnel data alone.

    Calculation of Power and Time Loss
    Hyp: a 32km/h (8.88 m/s in S.I. units) speed is considered and a professional rider producing an average power of 317W over the 200 mile (321 km in S.I. Units) Unbound Gravel Course.
    Therefore, the propulsive force on the pedals is:
    𝑃=317 π‘Š
    𝐹= 𝑃𝑣= 3178.88=35.7𝑁 (1)
    In terms of grams of force 1g = 0.00981 N, so:

    36 𝑁=3638,96 𝑔
    Assuming aerodynamic drag (Fd from wind tunnel results) as the only resistive force, the propulsive force (Ftot) to maintain the rider’s speed can be calculated using:

    Ftot = Ξ”Fd + F (4)
    The values of F and P are now known. Therefore, by manipulating equation (1) it is possible to calculate the time it would take to complete 321 km:

    𝑃=𝐹 𝑣=πΉπ‘‘π‘œπ‘‘βˆ— 𝑠 / 𝑑

    𝑑= (πΉπ‘‘π‘œπ‘‘βˆ—π‘ ) / 𝑃
    Where s is the distance (m)

    Read Less

    Key Features

      • Wind tunnel proven to offer the lowest aerodynamic drag among tested gravel-specific wheelsets under 50mm depth, offering the rider up to .12 Watt savings over renowned competitors, and 16.8 Watt savings over non-aero gravel wheels.
      • Rims | 700c Designed by HUNT's in-house engineering team, HUNT Limitless Technology delivers industry-leading cross wind stability verified by smooth steering moment data proven in wind tunnel testing. 25mm internal and 36mm external widths, and a 42mm u-shape profile.
      • Bearings | Featuring CeramicSpeed's world-renowned low-friction Coated Bearings, designed for off road use. These coated bearings are a further 75% tougher than their standard hardened steel races, and boast an average lifetime 7.5 times longer than other non-coated solutions. EZO bearing option also available.
      • Tyres | Designed around a 25mm internal rim width optimised aerodynamically for 38-42c gravel tyres. Feature a hooked tyre retention design for safety, fully ETRTO-compliant and tubeless-ready. To see recommended widths and pressures, see full specs here.
      • Hubs | New Sprint SL straight-pull center lock hubs. 15mm diameter 6066-T6 body and axle for supreme strength-to-weight. Circular dropout interface steps for added security in fitment. 3x treble-tooth pawls, resulting in just 7.5˚ engagement. Steel spline inserts to protect the cassette body.

        Please note: If you require a 6-bolt adapter you can purchase separately here.

      • Elliptical Wing Spokes | Pillar Wing spokes with aerofoil profile. Tested and proven to provide aerodynamic advantage over flat or bladed options both from Pillar and other competitors.
      • Axles | Easily adaptable & we fit them for you. Fit all current axle sizes and are easy to change. Click here to see all axle sizes.
      • Hand-built | All of our wheels are built and finished by hand, inclusive of a full quality control inspection.
      • Included | Tubeless tape & valves, spare spokes, axle adapters (please fill in the simple form after checkout to select your required size).
      • Weight | 1548g
      • See the full specs here

    The Experts' View

    Cycling News Recommends review Bicycling Australia LogoPeloton Magazine Logo

    Full Specs

  • Rims

    • Wind tunnel tested, aerodynamically optimised for 38-42c tyres
    • Hooked
    • H-lock bead-seat up-kicks for easy and secure tubeless installation
    • Unidirectional T24/30 carbon fiber with 3K weave re-enforced spoke holes
    • 36mm outer and 24.5mm inner width
    • 42mm depth
    • Matt black base finished with matt white contrasting graphics

  • Spokes

    • Pillar Wing with Aerofoil
    • 24 front and 24 rear interlaced
    • Aero Butted 2.0-2.2/0.95-2.0 then PSR section is 2.2
    • Straight-pull for excellent torsional strength and direct power transfer
    • Cold drawn from high grade T302 (18/10) stainless steel wire by Sandvik Sweden
    • Patented Pillar Spoke Re-enforcement, butted again just before the spoke head providing more durability in high stress area
    • Black stainless treatment

  • Nipples

    • Alloy square body for external adjustment and square head for easy internal adjustment/tensioning.
    • 16mm length with washer for a strong connection to the spoke added durability
    • 14 gauge
    • Black anodized finish

  • Tyres Info

      • HUNT recommends a 38-42mm tyre for best performance, tyre widths between 29mm and 64mm are also safe to use.
      • You must not exceed the maximum tyre pressure limits set out in the table below or the maximum limit set by your tyre manufacturer if this is lower.
      • Note: best performance is usually gained by using tyre pressures lower than the maximum, you can see our blog post here about this.
      • Tubeless-ready for lower weight and rolling resistance.

  • Axle Sizes

    These wheels are available with all existing disc brake road bike axle adapter sizes. We fit the axles you need, just complete the simple form shown after checkout:

    • Front: 12x100mm Thru-Axle, 9x100mm Thru-Axle, Quick Release 9x100mm
    • Rear: 12x142mm Thru-Axle, 12x135mm Thru-Axle, 10x135mm Thru-Axle, Quick Release 9x135mm

    If you are unsure what size your axles are don't worry it also includes the option to tell us your bike model and we will find out and then fit the correct axles, plus we're happy to change them later at our cost if you don't quite get it right. Please note; this form is shown after you have completed your order.

  • Front Hub

      • Forged and CNC’d 6066-T6 heat treated aluminum alloy body.
      • 6066-T6 aluminum alloy axles.
    • Center-lock disc mount. If you require a 6 bolt adapter you can purchase separately here.
    • HUNT SPRINT SL Disc straight-pull super-light alloy.
    • Polished anodized black finish with laser graphics.

  • Rear Hub

      • 6066-T6 heat-treated aluminum alloy freehub body.
      • Steel Spline Insert freehub body reinforcement provides excellent durability against cassette sprocket damage to the Shimano freehub often seen on standard alloy freehub bodies.
        • 3x treble-tooth individually leaf sprung pawls with 48 teeth on the ratchet ring for fast 7.5-degree engagement and instant acceleration.
        • All freehub standards accounted for.
        • Hunt Race Season Disc straight-pull super-light alloy.
          • Forged and CNC’d 6066-T6 heat treated aluminium alloy body.
          • Center-lock disc mount. If you require a 6 bolt adapter you can purchase separately here
          • Polished anodized black finish with laser graphics.
          • Intended use: Fast and light gravel riding. For loaded gravel riding and bikepacking, please consider wheelsets featuring HUNT 4 Season hubsets.

  • Bearings

    • Industry leading CeramicSpeed ceramic coated bearings. EZO bearing option also available.
    • 75% tougher than their standard hardened steel races, boasting an average lifetime seven and a half times longer than other non-coated solutions
    • CeramicSpeed bearing balls are of the highest quality, featuring the highest achievable surface finish and roundness
    • Life-time warranty (When registered with CeramicSpeed)

    • Warranty, HUNT Rolling Road Tests & Weight Limits

    These wheels come with H_CARE (Free Lifetime Crash Replacement) for the first owners. Read all about it here.

    A full 3 years (Life-time on CeramicSpeed bearings*) from purchase date warranty is offered to the original purchaser only on all HUNT wheels against material or workmanship defects, please click here to read full details. *Must be registered with CeramicSpeed

    All HUNT wheels models have to pass our harsh cobbled-rolling-road tests for rider weight limits, please see here for more details. Max system weight 130kg (system weight – total weight of fully kitted up rider, bike and luggage). If a rider is over 105Kgs then an experienced bike mechanic should check the wheel regularly. We are cyclists ourselves and do of course go above and beyond to offer excellent service if you ever do experience any issues. We carry full spares at very reasonable prices and offer complete support.

    60 Day Ride & Return Period. We are certain you'll be impressed by the acceleration, low-weight, speed and durability of our wheels. We are cyclists and as such strive to offer class leading service and support. Buy with confidence, if for any reason you wish to return the wheels for a full refund of your order you can do so up to a full 60 days after you receive them whether they have been ridden or not. Please note we cannot offer refunds on wheels that have suffered from crash damage but do offer H_CARE (Free Lifetime Crash Replacement) on these wheels.

    Reviews

    Bike Magazine and Website Experts' Views

    Cycling_News_Recommends Logo

    Cycling News Recommends

    "Though you might not fully appreciate the aerodynamic benefits at all times, you will certainly appreciate the wheelset’s ability to keep your bike planted, even in strong crosswinds. This is an aero wheel for any road, and any weather."
    Bicycling Australia Logo

    Bicycling Australia 9.5/10 Review

    "Overall, we’d give the wheels 9.5/10. They're fast, versatile, strong, light, look great and roll exceptionally well."

    HUNT 42 Limitless Gravel Aero Wheelset

    42 Deep | 36 Wide Ext | 25 Wide Int | 1548g | CeramicSpeed

    Which freehub do I need?
    Β£1,249
    Β£99 Deposit Option, refundable. (In dropdown)
    Pre-Order Now. Shipping:
    EZO (Steel) Bearings - Jan Wk 4 (Β£1,249)
    CeramicSpeed Bearings - Dec Wk 4 (Β£1,599)Items are selected to ship from us in the week stated. Delivery time is 1 day*
    We will ask for axle info after checkout.



    Order by 3pm for Next Day Delivery
    Our wheels are in high demand, don't miss out. Order now.

    *If shown in stock

    HUNT 42 Limitless Gravel Aero Wheelset Β£1,249.00