Components

Your time on the bike is precious, let Shimano make it even better. Ultegra ST-R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO-WAVE technology. The Di2 platform untethers the shifters while delivering fast and reliable wireless shifting. BR-R8170 disc brake caliper brings a new level of control to the road cycling world with improved modulation and a quicker initial braking point. Despite its smaller construction, the system is quieter than ever and easier to maintain. - The wireless connection provides a clean cockpit, enhancing the aerodynamic effect and easy maintenance - Wider pad clearance decreases brake noise - Maintenance-friendly bleeding process - Unparalleled ergonomic features, such as raised hood peaks on levers - Brake control is optimized with light and smooth lever action - Enhanced modulation thanks to an expanded braking control area - Compatible with wireless or wired connection

The heart of the connected cadre. The SRAM RED eTap AXS rear derailleur is AXS enabled for easy personalization and designed for both 1x and 2x systems. Advanced chain management keeps it silent and secure no matter the terrain. The derailleur also comes with faster pulleys, bearings, motors, and signals, improving speed in every way. - SRAM AXS-enabled for easy personalization - Orbit chain management technology keeps drivetrain quiet and secure - A single rear derailleur for all gearing combinations, including 1x and 2x - Improved motor and signal travel for faster shifting - Larger X-SYNC pulleys and ceramic bearings for increased durability and efficiency - Compatible with existing eTap batteries - Battery sold separately

Level up with the proven speed, durability, and ride quality of modern carbon mountain bike wheels. Lighter wheels for a faster you Kovee Elite 30 is a durable carbon XC wheel designed to level up every ride, complete with elite-level OCLV Carbon rims, a shallower profile, and quick-engaging Rapid Drive 108 XC hubs. 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 - Elite-level OCLV Carbon rims with 29mm internal width, 35mm external width, and 22mm depth - Shallow profile and wider inner rim width optimizes compliance and tire support for unmatched ride feel - Wider bead hooks add durability and help protect against pinch flats - Rapid Drive 108 XC hub with a splined drive ring shaves weight while adding durability - Tubeless ready rim comes with TLR rim strip and valve pre-installed for easy setup - Boost 110/148, 28 spoke front and rear with Grand Forza spokes and nipples (14/15) - 6-bolt disc with SRAM XD driver, additional freehubs available - No rider weight limit, warrantied for life Features: All-new rim shape The same rim profile of our industry-leading Kovee RSL wheels in a more modest build perfect for budget-concious riders looking for a value-packed performance upgrade. Smoother and stronger A shallower profile helps absorb harsh impacts and thicker bead hooks deliver a strong, durable wheel that's ready to take hits. Wider is faster A wide 29mm internal rim width better supports tire sidewalls and provides additional tire volume so you can run lower pressure for added traction and a smoother, faster ride. Fewer flats A wider hook bead offers a larger outside hook radius which provides more surface area on sharp impacts to help prevent pinch flats. OCLV Carbon Unique materials, layup procedures, and advanced engineering combine for the most sophisticated carbon available. Warrantied for life Carbon wheels can give your ride an instant upgrade in speed and handling – and when you choose Bontrager, your investment is protected. All Bontrager carbon wheels are backed by a lifetime warranty for the original owner. Better together Bontrager offers a complete tubeless system including wheels, tires, sealant, valves, and rim strips. Every part of this setup is designed to work smoothly together and offer top-of-the-line performance.

A high-value, high-performance, full-carbon disc brake road wheel packed with all of the aero and performance benefits of a 35mm carbon rim. Wheels for free speed Unlock the speed and performance of a carbon wheel upgrade with Aeolus Elite 35 TLR. This full carbon, tubeless-ready, disc brake road wheel balances durability, weight, and aerodynamics for outstanding performance that doesn't break the bank. A proven shape with a 35mm depth and the added versatility of disc brake hubs make this the perfect high-performance, high-value carbon road wheel. All Bontrager carbon wheels are warrantied for life for the original purchaser and come with the added protection of carbon care. If you damage your wheels while riding in the first 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 - D3 Dual Directional Design profile cuts drag at tire-leading and rim-leading edge - Tubeless Ready (TLR) rims allow for quick transition to tubeless system - 35mm depth OCLV Carbon rim (27mm outer, 19.5mm inner width) Grand Strada spokes 24/24, hex alloy nipples - Center lock disc hubs with 12mm thru-axle front and rear, Bontrager 24 point engagement, 3-pawl hub - Compatible with Shimano 10/11 speed, SRAM 10/11 freehubs, 12sp available separately - Includes TLR rim strip, TLR valve, and traditional rim strip - 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

Zipp's 101 XPLR is our first purpose-built rim for gravel. Thanks to MOTO Technology, this wheelset arms gravel cyclists with more control and durability over harsh terrain, providing a smooth ride quality that helps reduce fatigue. That means a more comfortable ride. The 101 XPLR -short for explore-is purpose-built for riders searching for adventure beyond the norm. Think of it as a magic carpet ride over primitive roads, especially with large tubeless tires at lower tire pressures. This rim is ideal for gravel racing, adventure, or any long day in the saddle. Based on Zipp's MOTO Technology, the 101 XPRL's single-wall rim construction provides excellent compliance and vibration damping. Less fatigue, allows you to ride longer and faster. Quarq's TireWiz is an add-on option for 101 XPRL to dial in your pressure for an even more compliant ride. - All day comfort and compliant ride - Available in 700c or 650b - 27mm wide internal profile - Reduced chance of pinch flatting - More traction in rough corners - Smoother ride in rocky terrain - Ability to run lower tire pressure - Less fatigue, which allows you to ride longer and faster - Frustration-free tire installation - Lifetime Warranty

Zipp's 101 XPLR is our first purpose-built rim for gravel. Thanks to MOTO Technology, this wheelset arms gravel cyclists with more control and durability over harsh terrain, providing a smooth ride quality that helps reduce fatigue. That means a more comfortable ride. The 101 XPLR -short for explore-is purpose-built for riders searching for adventure beyond the norm. Think of it as a magic carpet ride over primitive roads, especially with large tubeless tires at lower tire pressures. This rim is ideal for gravel racing, adventure, or any long day in the saddle. Based on Zipp's MOTO Technology, the 101 XPRL's single-wall rim construction provides excellent compliance and vibration damping. Less fatigue, allows you to ride longer and faster. Quarq's TireWiz is an add-on option for 101 XPRL to dial in your pressure for an even more compliant ride. - All day comfort and compliant ride - Available in 700c or 650b - 27mm wide internal profile - Reduced chance of pinch flatting - More traction in rough corners - Smoother ride in rocky terrain - Ability to run lower tire pressure - Less fatigue, which allows you to ride longer and faster - Frustration-free tire installation - Lifetime Warranty

Zipp's 303 S Tubeless Disc Brake wheelset provides today's cyclists the versatility they demand with the speed they crave. Expanding greatly on its heritage of conquering the Spring Classics, this 303 wheelset maintains its ideal-for-every-terrain 45mm rim depth but adds a significantly wider internal width to provide greater performance and ride quality in almost every measurable way. This wheelset is tubeless for disc-brake bikes, allowing the ability to run wide tires at lower pressures for race-ready speed on or off the pavement. The 303 S is among our lightest wheelsets, optimized for top aero performance with a 28mm tire but capable of handling gravel tires up to 50mm wide. - Wide rims optimize tire profile to allow lower tire pressure, especially with tubeless. The result is a larger contact patch for increased grip and confident cornering, descending, and handling in wet conditions. - Lower tire pressures and larger volume provides a compliant ride with fewer vibrations. - Significant watt savings when running larger tires at lower pressure. - Wide, hookless rims create a seamless transition to the tire, reducing drag. - Fastest with 28mm, but fits wide gravel tires as well - New Zipp graphics and cosmetic identity that scream speed

Zipp's 303 S Tubeless Disc Brake wheelset provides today's cyclists the versatility they demand with the speed they crave. Expanding greatly on its heritage of conquering the Spring Classics, this 303 wheelset maintains its ideal-for-every-terrain 45mm rim depth but adds a significantly wider internal width to provide greater performance and ride quality in almost every measurable way. This wheelset is tubeless for disc-brake bikes, allowing the ability to run wide tires at lower pressures for race-ready speed on or off the pavement. The 303 S is among our lightest wheelsets, optimized for top aero performance with a 28mm tire but capable of handling gravel tires up to 50mm wide. - Wide rims optimize tire profile to allow lower tire pressure, especially with tubeless. The result is a larger contact patch for increased grip and confident cornering, descending, and handling in wet conditions. - Lower tire pressures and larger volume provides a compliant ride with fewer vibrations. - Significant watt savings when running larger tires at lower pressure. - Wide, hookless rims create a seamless transition to the tire, reducing drag. - Fastest with 28mm, but fits wide gravel tires as well - New Zipp graphics and cosmetic identity that scream speed

The No.9 CX Flat Mount fork is a light-weight, forward-compatible front-end upgrade, ideal for cyclocross, gravel, or commuting. Featuring the flat mount disc brake standard, easy fender mounts and 12mm thru-axle dropouts to create a refined, clean design that trims considerable weight over previous versions. The fork provides big tire clearance, precise handling and tracking capabilities, and a comfortable ride quality that Whisky forks are known for. - 12mm thru-axle, 100mm spacing - Designed for flat mount disc brakes - Hidden, removable fender mounts - 42mm max recommended tire size - ASTM Condition 2 - For off-road riding and jumps less than 12-inches - Includes thru-axle and Whisky Parts Co. compression plug

Our No.9 84w rim looks to split the difference between our 70w and 100w rims, offering an 84mm internal width and a dash of versatility to fatbikers running 4–5-inch tires. We’ve narrowed the spoke bed to cut a little weight, and we’ve utilized a large, reinforced rim wall edge to withstand impacts related to running low pressures. Thanks to our convex rim profile designed to roll right through sand and snow, paired with our double-wall construction, all-season riding is within reach.

The Whisky No.9 CX Flat Mount fork is a lightweight, forward-compatible front-end upgrade, ideal for cyclocross, singletrack, gravel, or commuting. Redesigned, thoroughly tested, and dialed in for rough, off-road riding, it features the flat-mount disc brake standard, easy fender mounts, 12mm thru-axle dropouts, and internal brake routing for a refined, clean design. The fork provides big tire clearance, precise handling and tracking capabilities, and a comfortable ride quality that Whisky forks are known for. - 12mm thru-axle, 100mm spacing - Designed for flat-mount disc brakes - Fender eyelets on outside of fork leg for easy mounting - 700c x 42mm or 650B x 50mm max recommended tire size - ASTM Condition 3 – For rough off-road riding and jumps less than 24-inches - Includes thru-axle and Whisky Parts Co. compression plug

Sleek and serviceable, the Whisky No.9 CXLR Fork is a tough, lightweight upgrade for gravel riders and bikepackers looking to carry a little cargo up front. Sporting 3-pack mounts, mid-blade mounts for low-rider rack compatibility, and fender eyelets on the outside of the fork legs for easy mounting, the CXLR keeps everything clean and tidy with internal routing for brakes and dynamo hubs. Additional features like flat-mount brakes, 12mm thru-axles, and ample tire clearance make this standout piece perfect for your packing setup. - 12mm thru-axle, 100mm spacing - 700c x 42mm or 650b x 50mm max recommended tire size - ASTM Condition 3 – For rough off-road riding and jumps less than 24 - Includes thru-axle and Whisky Parts Co. compression plug - Brake Mount: Flat Mount 140 - Material: Carbon - Weight: 526g - Steerer Type: Tapered - Offset/Rake: 45 - Steerer Tube Length: 350mm - Axle to Crown Length: 395mm - S.H.I.S. Crown Race Diameter: 40 - S.H.I.S. Stem Clamp Diameter: 28.6 - Fork Minimum Rotor Size: 140 - Fork Maximum Rotor Size: 160

Whisky poured over every detail, pushed the limits and broke new ground during the creation of the No.9 Rigid Carbon Mountain Bike Fork. It eliminates uncomfortable chatter and vibration over rough sections for an astoundingly plush ride. The delightfully stiff and compliant UD carbon fiber construction, tapered steerer, and 15mm thru-axle ensure minimal weight and precise handling. It all results in an enhanced riding experience and adds up to performance that you can count on. - Custom DT RWS Skewer included - 3.0" max recommended tire size - Axle to Crown Length: 480mm - Brake Mount: IS Disc Brake 160mm - Crown Race: 40 - Defined Color: Black - Front Axle: 15 x 100mm - Offset: 51mm - S.H.I.S. Stem Clamp Diameter: 28.6 - Steerer Type: Tapered - Weight: 750 grams - Wheel Size: 29-inch

Whisky poured over every detail, pushed the limits, and broke new ground during the creation of the No.9 Fat Rigid Carbon Mountain Bike Fork. It eliminates uncomfortable chatter and vibration over rough terrain, so you experience an astoundingly plush ride with precise handling. They've accomplished this by using a delightfully stiff and compliant UD carbon fiber construction, a tapered steerer, and a 15 x 150mm thru-axle. It all results in an enhanced riding experience and adds up to performance that you can count on. - Post style brake mount - DT RWS Axle included - UD full carbon construction - Axle to Crown Length: 480mm - Brake Mount: Post Mount 160mm - Crown Race: 40 - Front Axle: 15 x 150mm - Material: Carbon - Offset: 51mm - S.H.I.S. Stem Clamp Diameter: 28.6 - Steerer Type: 1-1/8 – 1-1/2-inch tapered - Weight: 750 grams - Wheel Size: 26-inch

The Whisky No.9 MCX “monster cross” fork brings extra-wide tires to your drop-bar bike. How wide? The MCX accommodates tires up to 700c x 51mm or 650b x 61mm (that’s 2.4-inches). A relatively short 415mm axle-to-crown minimizes the geometry effects of a larger fork, and a 51mm offset improves toe clearance with large tires or fenders. The design draws from our CX forks, with lightweight carbon construction, a 12mm thru axle, and flat-mount brakes. Three-Pack mounts, dynamo cable routing, and fender mounts (700c x 45mm tire clearance with fender) add versatility for bikepackers and gravel riders. - 12 x 100mm thru-axle - Designed for flat mount disc brakes - Hidden, removable fender mounts - 700c x 51mm or 650b x 61 mm max tire size - ASTM Condition 2 - For off-road riding and jumps less than 12-inches - Includes thru axle and Whisky Parts Co. compression plug

A thoughtful complement to the Whisky No. 9 MTN Boost LT Fork, this short-travel offering is just the piece for transforming hardtail racers into fully rigid cross-country champs. Lightweight carbon construction, a tapered steerer, and thru-axle dropouts promise dependable strength and steering. - Lighter and stiffer than a suspension fork, the MTN Boost ST Fork is long enough to replace forks with 110–120mm of travel - 485mm axle to crown - Boost 110mm spacing with clearance for 29 x 3.0” or 27.5 x 3.0” tires - Room for up to 180mm rotor - Whisky No.9 Thru Bolt and compression plug included

For carving XC courses, going the distance on gravel roads, or roaming along bikepacking routes, the Whisky No.9 MTN Boost Fork brings a new dimension to your mountain bike. Lighter and stiffer than a suspension fork, it’s long enough to replace forks with 120mm to 130mm of travel. The boost 110mm spacing means your current wheels will likely bolt right in, and clearance for up to a 29 x 3.0" or 27.5 x 3.0" tire lets you alter your setup for wherever you’re riding. The Three-Pack mounts handily hold extra water, camping gear, tools, tubes, and more. - 15mm thru-axle with 110mm Boost spacing - Post-style brake mount - 1.5" tapered carbon steerer - Two sets of Three-Pack mounts - ASTM Condition 3 - For rough off-road riding and jumps less than 24"

Whisky's No.9 RD+ is an all-road fork designed for versatility with abundant tire clearance, up to 700x38c or 650x47c. Hidden and removable fender mounts make this fork all season capable. - 12mm Thru Axle - Flat Mount Disc Brake - Tapered Steerer Tube - 700x38c/650x47c clearance

The Whisky No.9 RD thru-axle fork is designed from the ground up to offer a modern road fork experience. Big tire clearance, flat mount brake capability, and internal cable routing all add up to a clean look and capable performance. Featuring sleek hidden fender mounts, this fork carries through with Whisky’s promise of refined, versatile performance. - 1-1/4-inch Tapered steerer tube - 12mm thru-axle, 100mm spacing - Designed for flat mount disc brakes - Hidden, removable fender mounts - 700 x 30c max recommended tire size - Includes thru axle and Whisky Parts Co. compression plug

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 i30 wheels were designed to handle it all, which is why they feature a strategically reinforced carbon layup and are hand built using double-butted spokes, brass nipples and high-engagement hubs featuring top-tier bearings and oversized freehub seals to establish themselves as wheels that simply won't quit. 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. 3-Cross Lacing & Brass Nipples - Too many companies are trying to save weight by offering "enduro" wheels with 2-cross lacing patterns and inadequate alloy nipples. While those are suitable for XC and light trail usage, there's no replacement for the long-term reliability of a 3-cross lacing pattern with brass nipples holding it all together. Frequency Hub - 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. Heavy-Duty Pawl Springs - CZR i30 wheels feature heavy-duty pawl springs that engage with greater force to counteract the additional torque caused by sudden cranking on steep trails. We also offer a Light Pawl-Spring Kit that can be purchased separately for CZR i30 riders who prefer a quieter hub with lighter pawl engagement. Usage: Trail, Enduro

Our flagship CZR carbon rims deliver minimal rotational weight and fine-tuned compliance to make you feel at one with the terrain. Reinforced spoke holes, TCS 2.0 technology, an asymmetrical design, and two years of development make them the most dependable carbon rims on the market. CZR rims set themselves apart from the pack by providing unbeatable strength and ride quality at a more affordable price. Available in i23 and i30 inner widths to satisfy the needs of both gravel and mountain riders. FEATURES: - Reinforced spoke beds, proven 4D angled spoke hole drilling, and an asymmetrical design…all the necessary ingredients of an incredibly durable rim. - Two internal width options… 23mm for the gravel-centric and 30mm for the mountain-focused. - When compared to the competition, lab tests proved our CZR carbon rims to be lighter overall, more impact resistant, and laterally stiffer while remaining vertically compliant. To be precise, our CZR i23 rims were 38% more impact resistant than their direct competition while our CZR i30 rims were 10% more impact resistant. USAGE: Adventure Road / Gravel / Cross-Country / Trail / Enduro

- The stiffest and most aero integrated handlebar and stem system - All carbon construction - Di2 compatible with integrated junction box compartment and wiring conduits - Compact 125mm drop, 80mm reach - 395g

- Light enough to take XC racing but was born from research and testing on the Enduro World Series circuit, making it a great rim for anyone looking to improve both descending and climbing - Asymmetric rim design allows for a stronger wheel while offering the easy inflation and Stan's trademark unmatched airtight seal. - 28mm internal width ideal for 2.2-2.5" tires - Light and durable 6069 aluminum with welded joint and reinforced spoke bed

- Light enough to take XC racing but was born from research and testing on the Enduro World Series circuit, making it a great rim for anyone looking to improve both descending and climbing - Asymmetric rim design allows for a stronger wheel while offering the easy inflation and Stan's trademark unmatched airtight seal. - 28mm internal width ideal for 2.2-2.5" tires - Light and durable 6069 aluminum with welded joint and reinforced spoke bed

The Arch MK4 is the wheelset a lot of us here at Stan's choose to ride. All-mountain, Downcountry, Trailduro—whatever they're calling it this week, when you like pushing your limits on climbs, descents, and every kind of trail, this is your wheelset. The Arch MK4's 28mm internal width and patented lightweight, low-profile design is not afraid to climb, while being an absolute monster on the descents. With a welded seam, reinforced spoke bed, and durable 6069 aluminum construction, the Arch MK4 rims give you the confidence to ride everything. When it comes to a consistent and reliable airtight tubeless seal, nothing beats Stan's patented Bead Socket Technology. The Arch MK4 rims feature an asymmetric design with offset spoke holes to improve spoke angle and create a stronger all-around wheel. Unlike most asymmetric rims that suffer from difficult inflation and poor tubeless performance, Stan's BST-Asymmetric design delivers all the advantages of a stronger wheel, with no compromises in tubeless performance. Nobody likes downtime, so the Arch MK4 wheelset is built with traditional J-bend spokes based on their proven strength, ride quality, and easy serviceability. Stan's has always made it easy to find replacement spokes should you ever damage your wheel, and now we've made it even easier. MK4 front and rear wheels of the same diameter all use the exact same very common spoke length, both sides, front and rear. Serviceability doesn't get any easier than that. From the first click of the incredible M-pulse hubs, it's clear that confidence is the philosophy behind every part of this wheelset. Designed and CNC machined by Project321 in Bend, Oregon, M-pulse freehubs feature 6 pawls with Neodymium magnets that lock into place with greater force than conventional pawl springs, but offer virtually no resistance when coasting. Multiple teeth on each pawl offer better load distribution for years of trouble-free riding, and the angle of the pawls was engineered to transfer stress away from the rotating bearings, decreasing stress and wear on the entire freehub. That durability extends to the 17mm axles machined of 7075 aluminum and the full complement of Enduro brand bearings, including a double-row freehub bearing. M-pulse internals are also fully shielded inside the hub, because the only thing better than a good bearing seal is a good bearing seal most dirt can't even reach. As durable as they are, these hubs are also built for speed. M-pulse hubs engage with only 1.66°of rotation, putting down power nearly instantaneously, but how smooth these hubs roll is what really stands out. Adjustable preload allows you to fine tune M-pulse hubs for reduced friction, and less drag means more speed on the ground.The result is a bombproof hub with quick, consistent engagement and less resistance for more speed. Available with Shimano Micro Spline, HG, or SRAM XDR freehub, and 6-bolt or Centerlock brake style, with options to fit all popular axle configurations. Tubeless ready with rim tape installed. The Arch MK4 is our most versatile wheelset, and the best aluminum wheelset available for riders who want to push limits on every trail. Up, down, and wherever the ride takes you, the Arch MK4 wheelset has it under control. - Arch MK4 wheels include pre-installed tape for tubeless use and presta valves. - Versatile 28mm internal rim width optimized for 2.2-2.5” tires - Light and durable 6069 aluminum with welded joint and reinforced spoke bed - BST-Asymmetric design combines Stan’s legendary easy tubeless inflation with a stronger, more balanced wheel build - M-pulse ultra-low drag magnetic pawl adjustable hubs with 1.66° engagement - Enduro bearings with double-row freehub bearing - Matched wheelsets use traditional J-bend lacing and share a single spoke length for easy serviceability - Connection program includes 5-year hub warranty, 3-year rim warranty, 1-year crash replacement, and $10 donation to trail maintenance or advocacy group of your choice

- Asymmetric rim design allows for a stronger wheel while offering the easy inflation and Stan's trademark unmatched airtight seal. - 25mm width optimized for 40mm Gravel tires and up to 2.3" mountain tires - Light and durable 6069 aluminum with welded joint and reinforced spoke bed

- Asymmetric rim design allows for a stronger wheel while offering the easy inflation and Stan's trademark unmatched airtight seal. - 25mm width optimized for 40mm Gravel tires and up to 2.3" mountain tires - Light and durable 6069 aluminum with welded joint and reinforced spoke bed

- 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 - 250lb Recommended Maximum Rider Weight - 27.5": 420g, 29": 455g