HUNT 5AM GRAVEL LIMITLESS WHEELSET - FD 54 X RD49 / FEW45 X REW38

HUNT 5AM GRAVEL LIMITLESS WHEELSET - AERO AT FULL VOLUME

FD 54 X RD 49 / FEW 45 X REW 38 / IW 27 / 1,447GRAM

Gravel racing isn’t slowing down, with race winners averaging over 35kph in key races. Higher speeds demand higher volume tyres, allowing for measurable aerodynamic gains. 5AM Gravel Limitless is engineered leveraging HUNT Patented Limitless Width Aero Technology, pairing the same aero maximised rim profiles as our wind tunnel-proven 5AM Gravel Limitless Ti_UD with Pillar Super Wing stainless steel spokes, delivering race-ready aero performance at just 1447g per pair. Tyre size: Aero optimised for 45mm and 50mm tyres; also fast with 40-60mm tyres.

PURPOSE

HUNT engineers collaborated with top gravel athletes to develop a gravel racing wheel system that combines category-leading aerodynamic performance for wide tyres with the responsiveness of a lightweight system when the course tilts up. The 5AM Gravel Limitless shares its rim profiles and Limitless Width Aero Technology with the Cyclingnews aero test-winning Ti_UD, laced with Pillar Super Wing spokes to create the most aerodynamic stainless steel spoke and hidden nipple combination we have ever developed. At 1447g per pair, with oversized rim beads to fend off race-ending pinch flats, the 5AM Gravel is built to carry speed and proven with victory at Gravel Mexico under the power of Hannah Shell, and 2nd at US Gravel National Championships by Sarah Lange.  

Informed by HUNT’s 5-Stage Aero Development process, the Aero Maximised system concentrates aerodynamic gains at the leading edge of the bike, with a wider, deeper front rim profile where it encounters clean air and offers the most aerodynamic benefit. The rear wheel is optimised for weight reduction and responsiveness, creating a lightweight system, holistically engineered for efficiency and stability at high speeds. Developed in the wind tunnel, light on the scales, tested on gravel, and built for the world’s fastest races.  

THE LAUNCHING VIDEO

https://youtu.be/i9X7to9CApk?si=-LaeXvosgZAU4BiU

FEATURES

Limitless Width Aero Technology (Advanced Carbon Construction)

5AM Gravel Limitless rims are made using a blend of T700, T800, and T1000 UD carbon fibers, 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.

• HUNT patented carbon construction with Aerospace-inspired carbon fibre layup strategy. 
• Low density structural polymer moulded between carbon layers. 
• Width & side-wind handling stability without weight. 

Pillar Super Wing Spokes (Hidden Spoke Nipples)

A new internal nipple interface further reduces aerodynamic and rotational drag across the wheel system, while double square nipples retain the ability to true and replace spokes as needed.

• Longest aerodynamic bladed section on the market, with an aerofoil profile to reduce drag. 
• Triple butted (2.2/0.95/2.0mm), cold drawn from high grade T302 stainless steel by Sandvik, Sweden. 
• Internal nipple interface further reduces turbulence across the rim surface. 

Pinch Flat Protection

• Extra wide rim beads (9mm front / 5.5mm rear) reduce chance of pinch flats. 
• Made possible with HUNT Patented Limitless Width Aero Technology. 
• Adds structural strength to rim profile. 

Aero Maximised System

• Deeper, wider front rim profile (54mm deep/45mm wide) engineered to slice through clean air. 
• Shallower, slightly narrower rear rim profile (49mm deep/38mm wide) engineered for weight savings and power transfer.

H_Ratchet 48T DBL Hub System

• The H_Ratchet 48T DBL is updated from the race-winning system developed for our 40 Limitless Gravel Aero wheelset. The ratchet system has been further improved with a new nickel coating, offering a quick 7.5° engagement angle and tested to survive over 100,000 cycles of 250Nm of torque (40% more torque than most other road and gravel-rated hubs). 

Race Tyre Optimised

• Optimised for aerodynamic performance and low rolling resistance with 45-50mm tyres. 
• 27mm internal width offers optimal tyre profile, rather than overly squared profile, for better sidewall support, pinch flat protection and cornering performance. 
• Fully compatible with 40-60mm Hookless/TSS tyres.

TECHNOLOGY

Designed from scratch by the HUNT engineering team to meet the future demands of high-speed gravel racing. Building on over ten years of aerodynamic and real-world rider testing, leveraging learnings from the 5-Stage Aero Development process, the HUNT 5AM Gravel Limitless wheel system was engineered to prioritise key performance benefits: aerodynamic drag reduction optimised for modern gravel racing tyres (45-50mm); pinch flat protection and race-ready durability; stability and predictability in changing wind conditions; and low system weight for responsiveness and climbing efficiency. These demands are achieved through front and rear-specific aero maximised wheel designs, which consider each component in the context of optimal system efficiency.  

The front wheel runs through clean air, offering the greatest opportunity to reduce aerodynamic drag. By increasing rim depth and width, while minimising rotational drag with hidden spoke nipples, the 5AM Gravel maximizes aerodynamic efficiency where it matters most without compromising crosswind stability. The 45mm-wide external rim profile with 9mm-wide rim beads smooths the airflow from wide gravel tyres across the rim profile. The wide, blunt profile of the bead is designed to spread impact force, preventing pinch flats.  

The rear wheel encounters turbulent airflow, downstream of the front wheel and tyre, 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 with a 5.5mm-wide bead provides efficient transmission of every watt to the ground, while preventing pinch flats. 

The 5AM Gravel Limitless pairs these Aero Maximised rim profiles with all-new Pillar Super Wing stainless steel spokes, featuring the longest aerodynamic bladed section on the market. Combined with a new internal nipple interface that further reduces turbulence across the rim surface, it’s the most aerodynamic stainless steel spoke and hidden nipple combination we have ever developed, bringing the 5AM Gravel Limitless platform to a compliant, easily serviceable build at 1447gper pair.  

In the wind tunnel, the 5AM Gravel Limitless proved fastest overall across the 12 wheels tested with 45mm tyres (0.24 watts faster than the DT Swiss GRC 50, and 0.63 watts faster than the Reserve 48|53 GR). Compared to the Zipp 303 XLPR SW, the 5AM Gravel Limitless saves 2.51 Watts with 45mm tyres and 1.09 watts with 50mm tyres, while weighing slightly less (3g). 

SPECIFICATIONS

CARBON RIMS

• 54mm deep front rim profile with a 45mm external width. 
• 49mm deep rear profile with a 38mm external width. 
• Hookless 27mm internal profile. 
• Aerodynamically optimised for a 45-50mm tyre.   
• Unique carbon fibre layup strategy, comprised of T700, T800, T1000 and a High Modulus 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 extensive rounds of wind tunnel testing. 
• High gloss finish unidirectional carbon fibre rim. 

SPOKES

• 24 front | 24 rear (2 cross both sides). 
• Pillar Super Wing 20 with aerofoil profile to reduce aero drag. 
• Triple butted 2.2/0.95/2.0mm to increase strength. 
• Straight-pull for excellent torsional strength and direct power transfer. 
• Cold drawn from high grade T302 (18/10) stainless steel by Sandvik, Sweden. 
• Patented Pillar spoke reinforcement, additional butting near the head of the spoke to increase strength in this high-stress area. 
• Black stainless treatment. 

NIPPLES

• Internal spoke nipples for improved aerodynamic performance. 
• 10mm in length. 
• Black anodised finish. 

FRONT HUB

• H_Ratchet DBL 48T.
• CNC’d 6061-T6 heat treated aluminium alloy body. 
• 7075-T6 aluminium alloy axle to increase stiffness. 
• Push-fit endcaps for easy serviceability. 
• Polished anodised black finish with laser graphics. 
• Centre-lock disc mount. If you require a 6 bolt adaptor you can purchase separately here. 

REAR HUB

• H_Ratchet DBL 48T. 
• Forged and CNC’d 6061-T6 heat treated aluminium alloy body. 
• 7075-T6 aluminium alloy axle. 
• Dual sided ratchet rings, 7.5˚ engagement. 
• The ratchets are nickel-coated to maximise longevity, tested to 100,000 cycles at 250Nm of torque. 
• All freehub standards accounted for. 
• Toolless fitment making routine servicing a simple task. 
• Polished anodised black finish with laser graphics. 
• Centre-lock disc mount. If you require a 6 bolt adaptor you can purchase separately here. 

BEARINGS

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

AXLE SIZES

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

     * Shimano Microspline and Campagnolo N3W is only available in 12x142mm 

TYRE INFO

• HUNT recommends a 45-54mm tyre for best performance, tyre widths between 40mm and 60mm are also safe to use. Only use tyres suitable for hookless (TSS) rims. If unsure, please contact the tyre manufacturer. Leading brands, including Schwalbe, Continental and Vittoria, have many tyres suitable for hookless TSS rims. 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 (Max Pressures: 40~44C: 51 PSI / 45~54C: 44 PSI / 55~60C: 36 PSI). Note: best performance is usually gained by using tyre pressures lower than the maximum, you can see our blog post about this, read here. 

MAX RIDER WEIGHT

• A max system weight of 130kgs (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.

IN THE BOX

• HUNT BlackShield tubeless tape fitted to wheels.  
• Spare spoke of each length along with nipple and nipple washer. 
• 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.  
• 1x 80mm and 1 x 60mm Tubeless Valves.  
• Pair of centre-lock rings. 
• Pair of HUNT padded wheel bags.   
• Quality control card signed by your wheel builder. 

WARRANTY: 3 YEARS W/ H_CARE

DESIGNED IN THE UK AND MADE IN TAIWAN

HUNT 5AM GRAVEL LIMITLESS WHEELSET - AERO AT FULL VOLUME

FD 54 X RD 49 / FEW 45 X REW 38 / IW 27 / 1,447GRAM

Gravel racing isn’t slowing down, with race winners averaging over 35kph in key races. Higher speeds demand higher volume tyres, allowing for measurable aerodynamic gains. 5AM Gravel Limitless is engineered leveraging HUNT Patented Limitless Width Aero Technology, pairing the same aero maximised rim profiles as our wind tunnel-proven 5AM Gravel Limitless Ti_UD with Pillar Super Wing stainless steel spokes, delivering race-ready aero performance at just 1447g per pair. Tyre size: Aero optimised for 45mm and 50mm tyres; also fast with 40-60mm tyres.

PURPOSE

HUNT engineers collaborated with top gravel athletes to develop a gravel racing wheel system that combines category-leading aerodynamic performance for wide tyres with the responsiveness of a lightweight system when the course tilts up. The 5AM Gravel Limitless shares its rim profiles and Limitless Width Aero Technology with the Cyclingnews aero test-winning Ti_UD, laced with Pillar Super Wing spokes to create the most aerodynamic stainless steel spoke and hidden nipple combination we have ever developed. At 1447g per pair, with oversized rim beads to fend off race-ending pinch flats, the 5AM Gravel is built to carry speed and proven with victory at Gravel Mexico under the power of Hannah Shell, and 2nd at US Gravel National Championships by Sarah Lange.  

Informed by HUNT’s 5-Stage Aero Development process, the Aero Maximised system concentrates aerodynamic gains at the leading edge of the bike, with a wider, deeper front rim profile where it encounters clean air and offers the most aerodynamic benefit. The rear wheel is optimised for weight reduction and responsiveness, creating a lightweight system, holistically engineered for efficiency and stability at high speeds. Developed in the wind tunnel, light on the scales, tested on gravel, and built for the world’s fastest races.  

THE LAUNCHING VIDEO

https://youtu.be/i9X7to9CApk?si=-LaeXvosgZAU4BiU

FEATURES

Limitless Width Aero Technology (Advanced Carbon Construction)

5AM Gravel Limitless rims are made using a blend of T700, T800, and T1000 UD carbon fibers, 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.

• HUNT patented carbon construction with Aerospace-inspired carbon fibre layup strategy. 
• Low density structural polymer moulded between carbon layers. 
• Width & side-wind handling stability without weight. 

Pillar Super Wing Spokes (Hidden Spoke Nipples)

A new internal nipple interface further reduces aerodynamic and rotational drag across the wheel system, while double square nipples retain the ability to true and replace spokes as needed.

• Longest aerodynamic bladed section on the market, with an aerofoil profile to reduce drag. 
• Triple butted (2.2/0.95/2.0mm), cold drawn from high grade T302 stainless steel by Sandvik, Sweden. 
• Internal nipple interface further reduces turbulence across the rim surface. 

Pinch Flat Protection

• Extra wide rim beads (9mm front / 5.5mm rear) reduce chance of pinch flats. 
• Made possible with HUNT Patented Limitless Width Aero Technology. 
• Adds structural strength to rim profile. 

Aero Maximised System

• Deeper, wider front rim profile (54mm deep/45mm wide) engineered to slice through clean air. 
• Shallower, slightly narrower rear rim profile (49mm deep/38mm wide) engineered for weight savings and power transfer.

H_Ratchet 48T DBL Hub System

• The H_Ratchet 48T DBL is updated from the race-winning system developed for our 40 Limitless Gravel Aero wheelset. The ratchet system has been further improved with a new nickel coating, offering a quick 7.5° engagement angle and tested to survive over 100,000 cycles of 250Nm of torque (40% more torque than most other road and gravel-rated hubs). 

Race Tyre Optimised

• Optimised for aerodynamic performance and low rolling resistance with 45-50mm tyres. 
• 27mm internal width offers optimal tyre profile, rather than overly squared profile, for better sidewall support, pinch flat protection and cornering performance. 
• Fully compatible with 40-60mm Hookless/TSS tyres.

TECHNOLOGY

Designed from scratch by the HUNT engineering team to meet the future demands of high-speed gravel racing. Building on over ten years of aerodynamic and real-world rider testing, leveraging learnings from the 5-Stage Aero Development process, the HUNT 5AM Gravel Limitless wheel system was engineered to prioritise key performance benefits: aerodynamic drag reduction optimised for modern gravel racing tyres (45-50mm); pinch flat protection and race-ready durability; stability and predictability in changing wind conditions; and low system weight for responsiveness and climbing efficiency. These demands are achieved through front and rear-specific aero maximised wheel designs, which consider each component in the context of optimal system efficiency.  

The front wheel runs through clean air, offering the greatest opportunity to reduce aerodynamic drag. By increasing rim depth and width, while minimising rotational drag with hidden spoke nipples, the 5AM Gravel maximizes aerodynamic efficiency where it matters most without compromising crosswind stability. The 45mm-wide external rim profile with 9mm-wide rim beads smooths the airflow from wide gravel tyres across the rim profile. The wide, blunt profile of the bead is designed to spread impact force, preventing pinch flats.  

The rear wheel encounters turbulent airflow, downstream of the front wheel and tyre, 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 with a 5.5mm-wide bead provides efficient transmission of every watt to the ground, while preventing pinch flats. 

The 5AM Gravel Limitless pairs these Aero Maximised rim profiles with all-new Pillar Super Wing stainless steel spokes, featuring the longest aerodynamic bladed section on the market. Combined with a new internal nipple interface that further reduces turbulence across the rim surface, it’s the most aerodynamic stainless steel spoke and hidden nipple combination we have ever developed, bringing the 5AM Gravel Limitless platform to a compliant, easily serviceable build at 1447gper pair.  

In the wind tunnel, the 5AM Gravel Limitless proved fastest overall across the 12 wheels tested with 45mm tyres (0.24 watts faster than the DT Swiss GRC 50, and 0.63 watts faster than the Reserve 48|53 GR). Compared to the Zipp 303 XLPR SW, the 5AM Gravel Limitless saves 2.51 Watts with 45mm tyres and 1.09 watts with 50mm tyres, while weighing slightly less (3g). 

SPECIFICATIONS

CARBON RIMS

• 54mm deep front rim profile with a 45mm external width. 
• 49mm deep rear profile with a 38mm external width. 
• Hookless 27mm internal profile. 
• Aerodynamically optimised for a 45-50mm tyre.   
• Unique carbon fibre layup strategy, comprised of T700, T800, T1000 and a High Modulus 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 extensive rounds of wind tunnel testing. 
• High gloss finish unidirectional carbon fibre rim. 

SPOKES

• 24 front | 24 rear (2 cross both sides). 
• Pillar Super Wing 20 with aerofoil profile to reduce aero drag. 
• Triple butted 2.2/0.95/2.0mm to increase strength. 
• Straight-pull for excellent torsional strength and direct power transfer. 
• Cold drawn from high grade T302 (18/10) stainless steel by Sandvik, Sweden. 
• Patented Pillar spoke reinforcement, additional butting near the head of the spoke to increase strength in this high-stress area. 
• Black stainless treatment. 

NIPPLES

• Internal spoke nipples for improved aerodynamic performance. 
• 10mm in length. 
• Black anodised finish. 

FRONT HUB

• H_Ratchet DBL 48T.
• CNC’d 6061-T6 heat treated aluminium alloy body. 
• 7075-T6 aluminium alloy axle to increase stiffness. 
• Push-fit endcaps for easy serviceability. 
• Polished anodised black finish with laser graphics. 
• Centre-lock disc mount. If you require a 6 bolt adaptor you can purchase separately here. 

REAR HUB

• H_Ratchet DBL 48T. 
• Forged and CNC’d 6061-T6 heat treated aluminium alloy body. 
• 7075-T6 aluminium alloy axle. 
• Dual sided ratchet rings, 7.5˚ engagement. 
• The ratchets are nickel-coated to maximise longevity, tested to 100,000 cycles at 250Nm of torque. 
• All freehub standards accounted for. 
• Toolless fitment making routine servicing a simple task. 
• Polished anodised black finish with laser graphics. 
• Centre-lock disc mount. If you require a 6 bolt adaptor you can purchase separately here. 

BEARINGS

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

AXLE SIZES

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

     * Shimano Microspline and Campagnolo N3W is only available in 12x142mm 

TYRE INFO

• HUNT recommends a 45-54mm tyre for best performance, tyre widths between 40mm and 60mm are also safe to use. Only use tyres suitable for hookless (TSS) rims. If unsure, please contact the tyre manufacturer. Leading brands, including Schwalbe, Continental and Vittoria, have many tyres suitable for hookless TSS rims. 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 (Max Pressures: 40~44C: 51 PSI / 45~54C: 44 PSI / 55~60C: 36 PSI). Note: best performance is usually gained by using tyre pressures lower than the maximum, you can see our blog post about this, read here. 

MAX RIDER WEIGHT

• A max system weight of 130kgs (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.

IN THE BOX

• HUNT BlackShield tubeless tape fitted to wheels.  
• Spare spoke of each length along with nipple and nipple washer. 
• 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.  
• 1x 80mm and 1 x 60mm Tubeless Valves.  
• Pair of centre-lock rings. 
• Pair of HUNT padded wheel bags.   
• Quality control card signed by your wheel builder. 

WARRANTY: 3 YEARS W/ H_CARE

DESIGNED IN THE UK AND MADE IN TAIWAN