Wheels

Zipp's 3ZERO MOTO carbon 29 enduro/trail wheelset is inspired by moto to provide riders with the control and durability required for pure trail speed. This wheel and its MOTO Technology have already been proven by multiple victories in the Enduro World Series with our pioneering partnership with the Lapierre Zipp Collective. While other wheel brands limit their focus to traditional box-section rim designs, Zipp engineers—uninhibited by legacy technology—took a different approach. They looked to motorsports as a model. Zipp's Moto Technology's single-wall rim is the optimal approach for an enduro/trail wheelset. The resulting rim provides something we call "ankle compliance." Imagine a runner rounding a sharp turn, the ankle naturally flexing to maintain grip as the runner leans. The 3ZERO rim can locally flex to stay parallel to the ground during cornering, increasing traction like a human ankle adjusts while running. This ability to twist locally allows it to deflect during single bead impacts without the rider getting bounced offline. 3ZERO MOTO helps you take the most direct route, saving seconds when and where they count most. At the center of the 3ZERO MOTO is the ZM2 hubset. This German-engineered hubset features 12 pawls and 132 points of engagement for a quicker response. The hub's improved seal design means better durability on rough terrain. Quarq's TireWiz is an add-on option for 3ZERO to dial in your pressure for an even more compliant ride. - Higher impact resistance - Reduced chance of pinch flatting - More traction in rough corners - Smoother ride in rocky terrain - Ability to run lower tire pressure - Reduced rider fatigue - Frustration-free tire installation - Rim is designed for compliance, creating the feel of extra suspension - German-engineered hubset features 12 pawls and 132 points of engagement for quicker response and also has improved durability - Lifetime Warranty

Zipp's 353 NSW Tubeless Disc-brake wheel is the pinnacle of our pursuit of versatility and speed. This wheel fuses Zipp's two most advanced approaches, Sawtooth rim profile and TSE, for an all-encompassing approach to performance. With its undulating 45mm-deep rim shape, the 353 NSW provides speed on every terrain with best-in-class aerodynamic efficiency and crosswind stability. The 353 NSW is Zipp's lightest tubeless wheelset yet, making it a fast-puncher ready to fight its way into the breakaway. Zipp's use of a hookless (straight side) rim in the 353 NSW is integral to achieving our mission of Making You Faster. With hookless, the transition between the tire and the rim is more seamless and aero. Zipp's hookless rims have more efficient resin distribution, which means lighter wheels. They also are highly durable. Zipp's 353 NSW's Sawtooth rim shape with Hyperfoils optimizes aerodynamic efficiency and crosswind stability. The Sawtooth design also allows the rim to be structurally strong but light. That will help you snap out of corners and maintain that speed no matter the terrain, especially in the steep, punchy stuff. The 353 NSW utilizes Zipp's Total System Efficiency, or TSE, approach to wheel design: overcoming specific barriers to speed: wind resistance, gravity, rolling resistance, and vibration losses. The wheel's 25mm internal width is ideal for running wider tubeless tires at reduced air pressure for a more efficient ride. At the center of the 353 NSW is the Cognition V2 Hubset, re-engineered with an updated Axial Clutch V2 mechanism for quicker engagement and lower friction, as well as improved durability. - Versatile endurance wheel for the modern road bike with tubeless and hookless rim profile - Our lightest tubeless wheel yet, making it a fast-puncher ready to fight - Optimized tire bed for easy tire installation - TSE for greater efficiency and reduced rolling resistance - Sawtooth rim with Hyperfoil nodes and HexFin ABLC dimple pattern for top aero and crosswind-stable performance with an undulating rim depth - Cognition V2 hubset rolls efficiently whether you are pedaling or coasting. Its Axial ClutchV2 technology reduces drag and lowers friction - Ships with 12mm end caps - Center Lock rotor interface. Lockring is included - Zipp graphics applied using Zipp's ImPress direct-print technology - Lifetime warranty

Zipp's 353 NSW Tubeless Disc-brake wheel is the pinnacle of our pursuit of versatility and speed. This wheel fuses Zipp's two most advanced approaches, Sawtooth rim profile and TSE, for an all-encompassing approach to performance. With its undulating 45mm-deep rim shape, the 353 NSW provides speed on every terrain with best-in-class aerodynamic efficiency and crosswind stability. The 353 NSW is Zipp's lightest tubeless wheel yet, making it a fast-puncher ready to fight its way into the breakaway. Zipp's use of hookless (straight side) rims in the 353 NSW is integral to achieving our mission of Making You Faster. With hookless, the transition between the tire and the rim is more seamless and aero. Zipp's hookless rims have more efficient resin distribution, which means lighter wheels. They also are highly durable. Zipp's 353 NSW's Sawtooth rim shape with Hyperfoils optimizes aerodynamic efficiency and crosswind stability. The Sawtooth design also allows the rim to be structurally strong but light. That will help you snap out of corners and maintain that speed no matter the terrain, especially in the steep, punchy stuff. The 353 NSW utilizes Zipp's Total System Efficiency, or TSE, approach to wheel design: overcoming specific barriers to speed: wind resistance, gravity, rolling resistance, and vibration losses. The wheel's 25mm internal width is ideal for running wider tubeless tires at reduced air pressure for a more efficient ride. At the center of the 353 NSW is the Cognition V2 Hubset, re-engineered with an updated Axial Clutch V2 mechanism for quicker engagement and lower friction, as well as improved durability. - Versatile endurance wheel for the modern road bike with tubeless and hookless rim profile - Our lightest tubeless wheel yet, making it a fast-puncher ready to fight - Optimized tire bed for easy tire installation - TSE for greater efficiency and reduced rolling resistance - Sawtooth rim with Hyperfoil nodes and HexFin ABLC dimple pattern for top aero and crosswind-stable performance with an undulating rim depth - Cognition V2 hubset rolls efficiently whether you are pedaling or coasting. Its Axial ClutchV2 technology reduces drag and lowers friction - Ships with 12mm end caps - Center Lock rotor interface. Lockring is included - Zipp graphics applied using Zipp's ImPress direct-print technology - Lifetime warranty

A light, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Good things last A lightweight carbon mountain bike wheelset ready to tackle any trail and stand up to that rock you just didn't see. Line Pro 30 features best-in-class strength and durability and even helps prevent pinch flats. Plus, simple tubeless setup makes it easy to unlock their full potential and run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - Ultra-durable OCLV Pro carbon provides a lighter layup for the ultimate in lightweight strength - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear DT Swiss Competition Race 14/16G spokes with Alpina alloy locking nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

A light, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Good things last A lightweight carbon mountain bike wheelset ready to tackle any trail and stand up to that rock you just didn't see. Line Pro 30 features best-in-class strength and durability and even helps prevent pinch flats. Plus, simple tubeless setup makes it easy to unlock their full potential and run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - Ultra-durable OCLV Pro carbon provides a lighter layup for the ultimate in lightweight strength - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear DT Swiss Competition Race 14/16G spokes with Alpina alloy locking nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

A strong, durable, OCLV Carbon MTB wheel with best-in-class impact strength, durability, and resistance to pinch flats. Warrantied for life This durable carbon mountain bike wheelset keeps the good times rolling. It delivers performance on any trail and durability against any rocks you can't avoid. Line Elite 30's robust rim profile delivers best-in-class strength and durability and resists pinch flats. Plus, simple tubeless setup makes it easy to run lower pressure for more confidence and a smoother, faster ride. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of Carbon Care. If your wheel sustains damage from riding within two years of ownership, we'll replace them. It’s that easy. Product details - OCLV carbon offers an optimized blend of weight, strength, and durability - Rim profile and hook bead design adds impact strength and helps prevent pinch flats - Rapid Drive 108 hub with 3.3 degrees of engagement for quick, confident energy transfer - Tubeless-ready (TLR) rims allow for quick upgrades to tubeless - Boost 110/148, 28 front/rear Grand Forza 14/15G spokes with Alloy hex nipples - 29mm internal, 38mm external width, 28 hole front/rear - 6 bolt disc, SRAM XD: Shimano 10/11 and MicroSpline driver available separately - Warrantied for life, no rider weight limit

At the core of this all-around wheelset lies a modern, wide and light aluminum rim. Being the foundations of the wheel, it makes for a balanced width to stiffness to weight ratio. The rim is complemented by DT's proven pawl drive system and a high end build with bladed spokes and alloy nipples. These features make it a premium training wheel easily able to race your mates to the city limits sign. - Spline hub - Straight-pull hub and spokes are radial laced - Includes RWS Eco skewer, tubeless ready tape and tubeless valve

Versatility. A mountain bike is meant to go up and down mountains and to provide fun while doing so. The H1700 Spline do precisely that. And since e-bikes allow the rider to go up and down many mountains in one ride, reliability and weight is key. - 350 based Spline hub - E-bike specific straight pull spokes are built with a 3-cross pattern - Includes tubeless tape and tubeless valve

The entry into the world of gravel riding, the G 1800. If you want to give cycling a try and plan to do your first rides off-road the G 1800 is your choice of wheel. Combining all the key advantages of DT's gravel segment wheels at a very attractive price point, these wheels may be your entry into the world of gravel riding. Leave for beaten roads and turn to the unexplored paths, the G 1800 will join you. - 370 based hub

When heavy duty riding is your passion, the C 1800 is the right partner fro any mission. It is right at home at anything from jumping obstacles, cutting through mud and sprinting up steeps. Trademark DT Swiss reliability coming from precision hubs, sturdy bladed spokes and superb wheel build guarantee trouble free rides. - Spline hub - Straight-pull hub and spokes are laced 2-cross - Includes tubeless ready tape and tubeless valve

The new standard in modern day, high performance cross country wheelsets. With its hookless full carbon and tubeless ready rim, the XRC 1200 strikes a perfect balance between lightweight and aggressive riding-readiness. Its intricately machined hubshell is superlight while the 25mm tall rim has the inherent stiffness necessary for efficient riding and to precisely hold a line. Together with the renowned DT Swiss build quality, this wheel really sets the benchmark for going fast up and down, whether it's between the tape or not. - Tubeless ready wide and light carbon rim - 180 Ratchet EXP 36pt hub with straight-pull DT spokes, 3-cross pattern - Factory installed tubless-ready tape - Includes tubeless valve, 6-bolt rotor adapter, XD and MicroSpline freehub bodies, tools and wheel bag

Tailored to the needs of performance orientated cross-country riders, the XRC 1501 SPLINE ONE leaves nothing to be desired. Lightweight 30 mm wide carbon rims offer ideal support for modern XC tires. Rolling on race proven and super durable 240 hubs and Competition Race spokes, allowing every bit of energy to be transferred into forward motion. - Designed for Cross Country applications - Carbon rim with 30mm internal width - 240 hub - Competition race spokes and Squorx nipples

If cross country means high speed after work rides and the occasional endurance race to you, then have a closer look at the XR 1700 SPLINE wheel. The lightweight and welded aluminum rim, laced with competition spokes and reliable 350 hub, create a snappy accelerating wheel. - Welded Aluminum rim with 25mm internal width - 350 hub with 36 point SL Ratchet system - Competition spokes and Squorx nipples - Designed for Cross Country applications

The XM 1700 SPLINE wheels were designed to dominate the mountain. Light and robust welded rims with perfect tubeless compatibility for grip and puncture resistance, built on reliable and smooth rolling 350 hubs. - Welded Aluminum rim with 30mm internal width - 350 hub with 36 point SL Ratchet system - Competition spokes and Squorx nipples - Designed for All Mountain applications

The ARC 1400 DiCut wheels also benefit from the AERO+ profile supporting safe riding in the aero position through optimal aerodynamics. The combination of new and proven aero components allows cyclists to control many riding situations at high speeds. - AERO+ optimized rims by Swiss Side - Stainless steel bearings

Your entire focus lies on the right line choice, the exact braking point and the spot-on steering movement. All the everyday stress fades away, you feel free and only hear the precise sound of the freehub system. The E 1900 Spline wheels were developed precisely for these freewheeling moments. A proven aluminum rim and hand-laced steel spokes provide the reliability required from an Enduro wheel. - Intended use = All-Mountain/Trail, Enduro and Freeride - Tubeless ready, 30mm wide and light rim - Straight-pull hubs/spokes built with a 3-cross pattern - Includes Tubeless Valve and Tape

Your entire focus lies on the right line choice, the exact braking point and the spot-on steering movement. All the everyday stress fades away, you feel free and only hear the precise sound of the freehub system. The E 1900 Spline wheels were developed precisely for these freewheeling moments. A proven aluminum rim and hand-laced steel spokes provide the reliability required from an Enduro wheel. - Intended use = All-Mountain/Trail, Enduro and Freeride - Tubeless ready, 30mm wide and light rim - Straight-pull hubs/spokes built with a 3-cross pattern - Includes Tubeless Valve and Tape, 6-bolt adapter with lockring

After a long climb, the perfect trail lies ahead of your tires: flowy, dusty, varied, endless. Nothing holds you back from entering the All-Mountain thrills with the M 1900 Spline wheels. A rim developed with optimal balance of durability and weight offers efficient climbing characteristics as well as dent resistance on single trails. With experienced wheel building by hand, this wheel is a reliable partner to collect freewheeling moments in the mountains. - Intended use = XC and All-Mountain/Trail - Tubeless ready, 30mm wide and light rim - Straight-pull hubs/spokes built with a 3-cross pattern - Includes Tubeless Valve and Tape, 6-bolt adapter with lockring

Increase the agility of lightweight eMTBs using this specific aluminum wheelset. Aligned to the purpose of lightweight eMTBs, the HX 1700 SPLINE LS aim for the right balance between lightness and resistance for more dynamic handling. The 350 hubs have been redesigned for eMTB to offer more resistance to the acceleration and braking forces. In addition, the spokes have been modified to increase their strength without drastically increasing the weight. These wheels are ready to be ridden on the fastest lines in technical sections and to carve into fast and tight turns. - Built to provide enhanced riding agility for light eMTBs - Agility-focused aluminum rims are light, yet resistant; helping to enable agile riding - New Hybrid-specific spokes for an advanced riding experience, combining resistance and lightweight - Built with the 350 Hybrid LS hub for enhanced reliability and contained weight

When motor assistance and leg power meet, the range of terrain a bike can conquer grows almost exponentially. The H 1900 SPLINE is designed for this, now upgraded with the famous DT Swiss Ratchet technology. The Ratchet LN system distributes the combined forces from the rider and the motor over a larger area than the previous pawl freehub systems, increasing the systems’ durability thanks to lower load peaks. The 370 hub enables full power transmission to the ground with reinforced hybrid spokes laced to a resistant aluminum rim, available in two inner widths. - Aluminum rim, Hooked / Crotchet tubeless ready - DT Hybrid 1 spokes are reinforced and increase the lateral and torsional stiffness of the wheel - 370 Hub - Includes Tubeless Valve and Tape, 6-bolt adapter with lockring

Nowadays, road riding is much more than riding on a road. Gravel, rough roads, fenders, lights and racks have broadened the horizon and ER 1400 is the premium alloy choice. It's 20mm, super light and resilient rim and 240s based hub is just what you need when rides lead into the unknown. - 240s based Spline hub with 36t ratchet system - Straight-pull hub and spokes are laced 2-cross - Includes tubeless ready tape and tubeless valve

Get back on the road with a genuine replacement wheel for your Cruiser Go!. When it's time to refresh your trusty bike, Trek original replacement wheels have you covered. PRODUCT DETAILS - Rear wheel equipped with Hyena hub motor - Does not include skewer, reflector, rim strip, valve, or owner's manual - Wheels shipped as photographed

- Designed, tested, and raced to victories on the World Cup DH and Enduro World Series circuits - Tie beam triple-cavity rim design resists damage and prevents air loss under impacts - 29mm internal width optimized for 2.35" to 2.8" Trail, All-mountain, and DH tires - E-sync hubs Specs: - Wheel Tire Type: Tubeless Ready - Wheel-Brake Comp.: Disc IS 6-bolt - Rim Material: Aluminum - Spoke Type: Sapim D-Light - Valve: Presta - Rim Construction: Double wall

EX 1700 SPLINE wheels feature a super strong and welded 30 mm wide aluminum rim with a profile design made to withstand the hardest use of Enduro racing, while still keeping the weight low for long and demanding uphills. Laced to double butted competition straightpull spokes, the EX 1700 SPLINE wheels are built to take a beating. - Welded Aluminum rim with 30mm internal width - 350 hub with 36 point SL Ratchet system - Competition spokes and Squorx nipples - Designed for Enduro applications

Wherever the road takes you, the ERC 1400 wheels with AERO+ optimized rim profiles allow you to stay in control during your extended endurance ride. Ride longer distances effortlessly thanks to wider and more comfortable tires. Each pedal force is transferred into propulsion and speed onto the 240 DICUT Aero hub by the reliable Ratchet EXP freehub system and DT aero comp t-head spokes. Simply enjoy your ride along the way. - Fast and light, Aero-optimized wheels for those longer rides on various terrains along your route. Ride comfortably and handle your bike safely even in fast descends

CRC 1400 Spline wheels are ready to conquer the harshest conditions with convenience. Never mind if the conditions are windy, muddy or rainy, the CRC 1400 Spline is ready to conquer them all. The aero-optimized rim supports your high speeds on descents and on the hunt for your competitors, no matter where the wind blows. The rim profile is tubeless ready, allowing you to take advantage of the technology and simply and conveniently change the tires according to the prevailing conditions of the track. This will ensure you always find the sweet spot between traction and rolling resistance.

Best seller. You'll be hard-pressed to find a better wheel anywhere near these prices.

- Asymmetric Bead Socket Technology brings Stan's legendary easy inflation and the most reliable airtight seal to wider, offset carbon rims - Custom carbon layup equalizes impact forces on both the long and short sides of the rim, making both stronger - Asymmetric rim shape with offset drilling improves bracing angle and balances spoke tension to create a stronger overall wheel - M-pulse hubs - 250lb Recommended Maximum Rider Weight

CZR i23 gravel wheels are designed to minimize weight while blending stiffness and compliance to maximize power transfer and increase comfort. CZR i23 rims feature a 24mm section depth to maximize energy transfer, reduce weight, improve vertical compliance, and reduce rider fatigue while a hooked bead also improves tire retention with high-pressure adventure road and gravel tires. CZR I23 CARBON RIMS Reinforced spoke beds improve overall wheel strength and durability while also minimizing weight in areas where less strength, and therefore material, is needed. CZR i23 rims feature 3mm of asymmetrical spoke offset and a 24mm section depth to improve radial stiffness and maximize energy transfer without being affected by crosswinds like other wheels with deeper profiles. SOLID STRIP & TCS TAPE Durable nylon strip that lies between the rim and tubeless tape to prevent tubeless tape from pushing into the spoke holes and ensures a smooth interface between the tire and rim. The smooth surface makes it easier to mount a tire by preventing air from escaping around the bead at each indent during inflation. Solid Strip also protects the airtight system from puncture in the case of a broken spoke. 2-CROSS OR 3-CROSS LACING CZR i23 gravel wheels with 24 spokes feature a 2-cross lacing pattern to increase radial stiffness and decrease weight. CZR i23 wheels with 28 spokes feature a 3-cross pattern to increase durability while still providing ample radial stiffness due to the additional spokes. FREQUENCY HUBS The world's best carbon rims deserved to be paired with high-quality hubs that further improve the performance of a lightweight, dependable carbon wheelset. Frequency hubs feature a low-drag, 6-pawl design that alternates contact between two sets of 3-pawl groupings to provide a responsive 5 degrees of freehub engagement. Frequency hubs laced to CZR i23 wheels feature lightweight pawl springs that minimize drag and therefore improve efficiency for drop-bar usage. AERODYNAMIC WING SPOKES Pillar racing spokes that are cold-forged into an aerodynamic wing shape that reduces drag at the trailing end of each spoke. As a result, wing spokes improve overall efficiency while still retaining the gram-conscious weights of traditional bladed spokes. SAPIM ALLOY NIPPLES All CZR i23 wheels feature time-tested Sapim alloy nipples to further reduce overall wheel weight while still exceeding the durability requirements of gravel. Countless Configurations CZR i23 wheels are available in a 24-spoke option for riders looking to minimize weight and increase compliance, while the 28-spoke versions are best for heavier or more aggressive riders who prioritize stiffness and durability. All CZR i23 wheels are available with Centerlock or 6-bolt rotor mounts. CZR i23 front wheels use a 12x100mm Frequency hub, but 15mm end caps are also available separately. Why Choose CZR i23? Fast and light CZR i23 gravel wheels were designed to minimize weight and maximize compliance on rough gravel roads. With front-wheel weights starting at 620g and rears at 775g, they also deliver the greatest strength-to-weight ratio of any gravel wheelset on the market. We even stand behind them with our Ride With Confidence Guarantee for those few-and-far-between crash replacement cases.

CZR i23 gravel wheels are designed to minimize weight while blending stiffness and compliance to maximize power transfer and increase comfort. CZR i23 rims feature a 24mm section depth to maximize energy transfer, reduce weight, improve vertical compliance, and reduce rider fatigue while a hooked bead also improves tire retention with high pressure adventure road and gravel tires. CZR I23 CARBON RIMS Reinforced spoke beds improve overall wheel strength and durability while also minimizing weight in areas where less strength, and therefore material, is needed. CZR i23 rims feature 3mm of asymmetrical spoke offset and a 24mm section depth to improve radial stiffness and maximize energy transfer without being affected by crosswinds like other wheels with deeper profiles. SOLID STRIP & TCS TAPE Durable nylon strip that lies between the rim and tubeless tape to prevent tubeless tape from pushing into the spoke holes and ensures a smooth interface between the tire and rim. The smooth surface makes it easier to mount a tire by preventing air from escaping around the bead at each indent during inflation. Solid Strip also protects the airtight system from puncture in the case of a broken spoke. 2-CROSS OR 3-CROSS LACING CZR i23 gravel wheels with 24 spokes feature a 2-cross lacing pattern to increase radial stiffness and decrease weight. CZR i23 wheels with 28 spokes feature a 3-cross pattern to increase durability while still providing ample radial stiffness due to the additional spokes. FREQUENCY HUBS The world's best carbon rims deserved to be paired with high-quality hubs that further improve the performance of a lightweight, dependable carbon wheelset. Frequency hubs feature a low-drag, 6-pawl design that alternates contact between two sets of 3-pawl groupings to provide a responsive 5 degrees of freehub engagement. Frequency hubs laced to CZR i23 wheels feature lightweight pawl springs that minimize drag and therefore improve efficiency for drop-bar usage. AERODYNAMIC WING SPOKES Pillar racing spokes that are cold-forged into an aerodynamic wing shape that reduces drag at the trailing end of each spoke. As a result, wing spokes improve overall efficiency while still retaining the gram-conscious weights of traditional bladed spokes. SAPIM ALLOY NIPPLES All CZR i23 wheels feature time-tested Sapim alloy nipples to further reduce overall wheel weight while still exceeding the durability requirements of gravel. COUNTLESS CONFIGURATIONS CZR i23 wheels are available in a 24-spoke option for riders looking to minimize weight and increase compliance, while the 28-spoke versions are best for heavier or more aggressive riders who prioritize stiffness and durability. All CZR i23 wheels are available with Centerlock or 6-bolt rotor mounts. CZR i23 front wheels use a 12x100mm Frequency hub, but 15mm end caps are also available separately on our Replacement Hub Parts page. WHY CHOOSE CZR I23? Fast and light CZR i23 gravel wheels were designed to minimize weight and maximize compliance on rough gravel roads. With front-wheel weights starting at 620g and rears at 775g, they also deliver the greatest strength-to-weight ratio of any gravel wheelset on the market. We even stand behind them with our Ride With Confidence Guarantee for those few-and-far-between crash replacement cases. Read below for more info.