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HUNT 4AM Limitless Ti_UD Carbon Spoke Disc Wheelset | Previous Model IC469

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HUNT 4AM Limitless Ti_UD Carbon Spoke Disc Wheelset | Previous Model IC469

1156g	Depth	Width ext	Width int	size
1156g	F49.5/ R47	F34.2/ R30	23 mm	700c

Built for efficiency, no matter where the road takes you.

The 4AM Limitless accelerates faster while delivering speed across steep mountain climbs and handles blistering descents with confidence at race pace. Delivered through HUNT's 5-Stage Aero Development, with patented Limitless Width Aero Technology, Ti_UD Carbon Spokes, and unreleased CeramicSpeed bearings.

Tyre size: 28–30mm tyres for maximum efficiency and stability. Hooked rim supports up to 50mm tubeless or clincher setups.

More details

The Purpose _

Engineered for the demands of Queen stages found in modern road racing, the 4AM Limitless maintains speed and composure from fast flats to high alpine mountain roads. By optimising the balance between weight, aero drag, and stability, the HUNT in-house engineering team has set the standard for mid-depth road wheels.

Drawing on 10 years of wheel development, materials innovation and an evolving process of aerodynamic and real-world testing, the 4AM Limitless was created using a complete system approach to performance. Each component of the wheel system was engineered, vetted and validated through HUNT’s 5-Stage Aero Development process, to make riders faster in actual racing conditions, not just on paper.

KEY FEATURES_

Limitless Width Aero Technology

HUNT patented carbon construction.
Low density structural polymer moulded between carbon layers.
Width without weight.

Stable Profile

Aero maximised front rim profile.
Reduced aerodynamic drag.
Improved stability through higher wind angles.

Aero Drag Reduction Spokes

Vonoa ultralight unidirectional carbon fibre.
Reduced front spokes from 18 to 15.
Weighing just 1.7g per spoke.

Chase SLC Hub System

Precision-machined from high strength 7075 alloy. 289g per pair.
Dual-sided zinc-coated ratchet system.
7.5° engagement angle.

CeramicSpeed Bearings

Unreleased ceramic ball bearings with a new stainless steel bearing race.
Friction reduction & corrosion protection.
Covered by lifetime warranty.

TECHNOLOGY _

Designed by HUNT’s in-house engineering team, the 4AM Limitless is the stablemate to our flagship 5AM – it shares the same rider-first philosophy and aerodynamic DNA, but tuned for those who want Limitless performance in a more versatile, everyday package. Built on years of aerodynamic learning and the same 5-Stage Aero Development process that shaped the 5AM, the 4AM is engineered to perform in the real world, with a rider on the bike. Through this proven, layered development process and patented Limitless Width Aero Technology, performance is maximised to achieve the optimal balance between aerodynamics and weight, delivering the fastest wheel system available under 50mm.

The front wheel runs in clean air, offering the greatest opportunity to reduce drag. By increasing rim depth and width, while minimising rotational drag through reduced spoke count, hidden spoke nipples and low profile hub design, we maximise aerodynamic efficiency where it matters most without compromising crosswind stability.

The rear wheel encounters turbulent airflow, downstream of the front wheel, frame, and rider movement, making rear wheel aerodynamic gains less important in the context of the complete system. Rear wheel efficiency is achieved by reducing weight and maximising power transfer. A shallower, narrower rim paired with additional spokes delivers enhanced responsiveness and efficient transmission of every watt to the road.

Read the full in-depth white paper, here.

4.06 watts faster than the ZIPP 353 NSW with a 30mm tyre. Paired with a 28mm tyre, the 4AM Ti_UD performed 0.32 and 1.25 watts faster than the deeper and heavier Roval Rapide CLX II and ZIPP 454 NSW wheels, respectively.

In outdoor testing, conducted in partnership with Dr. Barnaby Garrood at Aerosensor™, the rotational drag reduction of the more aerodynamic spoke design and lower spoke count, play an important role in developing the best road racing wheelset to the market.

Full Specs _

Rims

49.5mm deep front rim profile with a 34.2mm external width. 47mm deep rear profile with a 30mm external width. Hooked 23mm internal profile. Compatible tyres ranging from 28-50mm to be fitted including tubeless or clincher tyres in line with ETRTO guidelines. Aerodynamically optimised for a 28-30mm tyre. Unique carbon fibre layup strategy, comprised of T700, T800, T1000 and a high modulus Mitsubishi Pyrofil HR4012M carbon. Pre-formed 3D spoke reinforcement. Designed by HUNT’s in-house Engineering Team using Computational Fluid Dynamics (CFD) and then validated using wind tunnel testing. High gloss finish unidirectional carbon fibre rim.

49.5mm deep front rim profile with a 34.2mm external width.
47mm deep rear profile with a 30mm external width.
Hooked 23mm internal profile.
Compatible tyres ranging from 28-50mm to be fitted including tubeless or clincher tyres in line with ETRTO guidelines.
Aerodynamically optimised for a 28-30mm tyre.
Unique carbon fibre layup strategy, comprised of T700, T800, T1000 and a high modulus Mitsubishi Pyrofil HR4012M carbon.
Pre-formed 3D spoke reinforcement.
Designed by HUNT’s in-house Engineering Team using Computational Fluid Dynamics (CFD) and then validated using wind tunnel testing.
High gloss finish unidirectional carbon fibre rim.

Spokes

Ti_UD VONOA carbon spokes. 15 front spokes, 2 cross on the rotor side and radial on the drive side. 18 rear spokes, 2 cross on the drive side, 1 cross on the rotor side. Spokes built in a 2:1 lacing pattern. Titanium Ti6-4AL-4V spoke end hardware. Tuned carbon spoke gauges each side to match 2:1 spoke pattern.

Ti_UD VONOA carbon spokes.
15 front spokes, 2 cross on the rotor side and radial on the drive side.
18 rear spokes, 2 cross on the drive side, 1 cross on the rotor side.
Spokes built in a 2:1 lacing pattern.
Titanium Ti6-4AL-4V spoke end hardware.
Tuned carbon spoke gauges each side to match 2:1 spoke pattern.

Nipples

Aluminium nipple, with a Nyloc insert. Fully serviceable, unlike bonded carbon spoke systems. Internal nipple for truing. Black anodised finish.

Aluminium nipple, with a Nyloc insert.
Fully serviceable, unlike bonded carbon spoke systems.
Internal nipple for truing.
Black anodised finish.

Front Hub

Chase SLC front hub. CNC machined from 7075-T6 heat-treated aluminium. Hub weight of 90g. 7075-T6 aluminium alloy axle to increase stiffness. Keyed and captive spoke holes lock spokes into place once tensioned. Push-fit endcaps for easy serviceability. Satin gunmetal grey finish.

Chase SLC front hub.
CNC machined from 7075-T6 heat-treated aluminium.
Hub weight of 90g.
7075-T6 aluminium alloy axle to increase stiffness.
Keyed and captive spoke holes lock spokes into place once tensioned.
Push-fit endcaps for easy serviceability.
Satin gunmetal grey finish.

Rear Hub

Chase SLC rear hub. CNC machined from 7075-T6 heat-treated aluminium. Hub weight of 199g. H_Ratchet DBL 48T drive system, features two floating star ratchet rings with 48 teeth, to offer a fast 7.5° engagement angle. Zinc-coated ratchet rings to maximise longevity, tested to 100,000 cycles at 250Nm of torque. Keyed and captive spoke holes lock spokes into place once tensioned. Push-fit endcaps for easy serviceability. H_CERAMIK coated alloy freehub body. Satin gunmetal grey finish.

Chase SLC rear hub.
CNC machined from 7075-T6 heat-treated aluminium.
Hub weight of 199g.
H_Ratchet DBL 48T drive system, features two floating star ratchet rings with 48 teeth, to offer a fast 7.5° engagement angle.
Zinc-coated ratchet rings to maximise longevity, tested to 100,000 cycles at 250Nm of torque.
Keyed and captive spoke holes lock spokes into place once tensioned.
Push-fit endcaps for easy serviceability.
H_CERAMIK coated alloy freehub body.
Satin gunmetal grey finish.

Bearings

Unreleased CeramicSpeed ceramic ball bearings and a new stainless steel bearing race. Custom-made light contact seals. Covered by CeramicSpeed lifetime warranty. Or Stainless steel cartridge bearings. Manufactured by TPI. CN clearance to provide the best fitment possible and long bearing life under cycling conditions.

Unreleased CeramicSpeed ceramic ball bearings and a new stainless steel bearing race.
Custom-made light contact seals.
Covered by CeramicSpeed lifetime warranty.

Or

Stainless steel cartridge bearings.
Manufactured by TPI.
CN clearance to provide the best fitment possible and long bearing life under cycling conditions.

Tyres Info

HUNT recommends a 28-30mm tyre for best performance, tyre widths between 28mm and 50mm are also safe to use. Tubeless-ready for lower weight and rolling resistance. Also designed to work excellently with standard clincher tyres and inner tubes. 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.

HUNT recommends a 28-30mm tyre for best performance, tyre widths between 28mm and 50mm are also safe to use.
Tubeless-ready for lower weight and rolling resistance. Also designed to work excellently with standard clincher tyres and inner tubes.
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.

Axles

These wheels are available in the following 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, Quick Release 9x100mm. Rear: 12x142mm Thru-Axle, 12x135mm Thru-Axle, 10x135mm Thru-Axle, Quick Release 9x135mm. If you're not sure about your axle size, no problem - we’ve got you covered. You can simply provide your bike model after check out, and we’ll identify and fit the correct axle adaptors for you. If it turns out they’re not quite right, we’ll happily replace them at no extra cost. Please note: the axle form will appear after you’ve completed your order.

These wheels are available in the following 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, Quick Release 9x100mm.

Rear: 12x142mm Thru-Axle, 12x135mm Thru-Axle, 10x135mm Thru-Axle, Quick Release 9x135mm.

If you're not sure about your axle size, no problem - we’ve got you covered. You can simply provide your bike model after check out, and we’ll identify and fit the correct axle adaptors for you. If it turns out they’re not quite right, we’ll happily replace them at no extra cost.

Please note: the axle form will appear after you’ve completed your order.

HIGH SPECIFICATION COMPONENTS _

Advanced Carbon Construction

4AM Limitless rims are made using a blend of T700, T800, and T1000 UD carbon fibres, with high-modulus Mitsubishi Pyrofil HR4012M - a material more common in aerospace, aviation and motorsport applications. This blend offers lateral and sidewall strength, enabling low weight without compromising durability or trueness. The high gloss finish resists dirt build up and helps minimise aerodynamic skin drag.

Ti_UD VONOA Carbon Spokes

The top of the wheel moves through the fork at twice the speed of the bike, meaning small design features add up to large aero gains. We have combined a slim frontal profile with elongated bladed shape for improved aerodynamic efficiency. Titanium Ti6-4AL-4V end hardware keeps weight exceptionally low, while maintaining strength and resistance to corrosion.

Hidden Spoke Nipples

Internal spoke nipples further reduce aerodynamic and rotational drag across the wheel system.

Limitless Aero Maximised Front Rim

HUNT patented Limitless Width Aero Technology enables us to build a rim that possesses wide, blunt dimensions and class-leading aerodynamic and side wind handling characteristics, whilst maintaining a weight that won’t detract from the all-round performance of the wheelset. What does that mean on the road? The wheel carries speed like a deeper wheel, with the stable feel of a shallower wheel.

Chase SLC Hub

The Chase SLC hubset is our premium hubset that has evolved from the race winning 48T DBL ratchet system, developed for our Limitless Road and Gravel Range. Coming in at an astonishing 289g for the pair, a reduction in weight found from the utilisation of higher grade 7075 alloy. This has been tested to withstand over 100,000 cycles at 250Nm of torque, providing exceptional reliability, sprint after sprint.

CeramicSpeedWheel Bearings

HUNT have partnered with CeramicSpeed to exclusively bring a yet-to-be-released wheel bearing offering the optimal balance between performance and durability to the wheelset. Hand-built in Denmark, these bearings feature a ceramic ball with stainless steel bearing race for industry-leading performance.

Covered by CeramicSpeed's lifetime warranty.

What's in the box _

HUNT BlackShield tubeless tape fitted to wheels.
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.
Cassette spacer for 8/9/10 speed and XDR-XD compatibility.
Tyre insert compatible tubeless valves with valve core removal endcap 60mm.
Colour-matched brake disc rotor lockrings, cassette tool fitment.
Pair of HUNT padded wheel bags.
Quality control card signed by your wheel builder.

WARRANTY_

A full 3 years from purchase date warranty is offered to the original purchaser only on all Hunt bike wheels against material or workmanship defects, please click here to read full details. 

These wheels come with  H_Care  FREE  Lifetime Crash Replacement which aims to protect your investment in HUNT technology by enabling first owners of eligible HUNT wheels free access to any HUNT-branded replacement parts and labour to repair in the event of damage through intended use. We will cover the reasonable cost of the labour to repair your wheels at a local bike shop or professional bike mechanic or perform the work free of charge at our nearest office. If a repair is unrealistic, we will replace your damaged wheel. 

Stated wheel weights: Our stated wheel weights reflect the wheelset only; without rim tape, tubeless valves or disc brake lock rings, as is industry standard. While a 3% variance (lower or higher) in total system weight is completely normal in manufacturing.  A max system weight of 120kgs (system weight – total weight of fully kitted up rider, bike and luggage). If a rider is over 100kgs then an experienced bike mechanic should check the wheel regularly.

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