Parts

Comfort without sacrificing power Aeolus Elite brings comfort, power, and speed to road riders looking to dig deep and rotate further forward into a more aero road position. It's the go-to race saddle for both men and women who want to comfortably get the most out of their aero road bike. A shorter overall length with a wider nose and full cut-out ensure targeted support that eliminates soft-tissue pressure. Product details - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Designed to support riders in an Aero Road riding position - Full saddle cut-out minimizes soft-tissue pressure allowing for a more powerful, rotated position - Two sizes designed to align saddle with bone structure for both men and women and avoid soft-tissue compression - Austenite rails are lighter and stronger than hollow Titanium - Lightweight shell provides balance of weight, strength, and compliance - Elite-level trim optimizes foam padding for added lightweight comfort - Available Blendr accessory mounts to cleanly integrate rear light

Comfort without sacrificing power Aeolus Comp brings comfort, power, and speed to road riders looking to dig deep and rotate further forward into a more aero road position. Added padding make it the go-to saddle for anyone who wants to comfortably get the most out of their aero road bike. A shorter overall length with a wider nose and full cut-out ensure targeted support that eliminates soft-tissue pressure. Product details - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Designed to support riders in an Aero Road riding position - Full saddle cut-out minimizes soft-tissue pressure allowing for a more powerful, rotated position - Two sizes designed to align saddle with bone structure for both men and women and avoid soft-tissue compression - Lightweight shell provides balance of weight, strength, and compliance - Comp-level trim optimizes foam padding for added lightweight comfort - Available Blendr accessory mounts to cleanly integrate rear light

A durable lock-on grip with a unique finned texture for added comfort and control on the trail. Get a grip on sustainability The XR Trail Elite mountain bike grip has a finned texture that forms to your hand to keep you comfortable on all-day riding sessions. A higher density material surrounds the end of the grip for added durability and the lightweight CoreLock clamp holds the grip securely in place for confidence on even the most technical trails. You and your hands will both feel good knowing that the grip's core is made from recycled ocean-bound plastics. Product details - Finned texture pattern conforms to your hand for supportive grip - Rubber compound and tread design are optimized for control and comfort - Grip core made with recycled ocean-bound plastic - Single-clamp design maximizes grip surface for secure, predictable performance - Alloy core-lock clamp eliminates slipping by securing grip core to bar - Higher-density end cap resists scraping for added durability - 3mm M4 bolt increases hold and resists stripping - 31mm diameter

A lightweight carbon road handlebar that features a variable, compact radius for multiple hand positions. The Pro VR-C is a lightweight carbon road handlebar that features a unique Variable Radius Compact bend that creates the ideal hand position for quick transitions from the tops to the drops. Integrated Di2-compatible ports offer clean internal wire routing when used with Shimano EW-RS910 bar-mounted Di2 junction. Product details - OCLV Carbon construction - Variable Radius Compact (VR-C) design allows longer reach and drop - Laser-etched brake lever position lines for spot-on control set-up - Compatible with clip-on aero bars - Compatible with Shimano EW-RS910 bar end Junction-A for cleaner Di2 routing

Recommended for grip shift and riders looking for the best shock absorbing grip in the industry. 60 grams, standard grip length - 5 1/8", installed DIA. 32mm, weight plus or minus 5%, 1 set of bar plugs included. - 60 Grams - Standard Grip Length – 5 1/8" - 32mm - Weight plus or minus 5% - Made for 22mm bars (can fit applications down to 19mm) - Bar Plugs included - *Install Bar Plugs first for the protection of grips and ease of installation

- Allows quick chain removal without tools - MissingLink 410HD|~|1sp|~|BMX Heavy Duty chain|~|9.4mm|~|each|~| - MissingLink 410|~|1sp|~|BMX|~|8.6mm|~|each|~| - MissingLink II|~|8sp|~|all|~|7.1mm|~|6/card|~| - MissingLink-9|~|9sp|~|all|~|6.6mm|~|6/card|~| - MissingLink-10R|~|10sp|~|KMC, Shimano, SRAM|~|5.9mm|~|6/card|~| - MissingLink-10CR|~|10sp|~|Campagnolo only|~|5.9mm|~|6/card|~| - MissingLink-11|~|11sp|~|Campy, KMC, Shimano|~|5.5mm|~|6/card|~|

Bontrager's SSR Grips are made from a dual compound: the hard inner core eliminates slippage on the bars, the soft outer layer provides great grip and all-day comfort in any condition.

A light and versatile saddle with a shorter profile for targeted comfort, perfect for riders of all genders and all disciplines. Comfort in a compact package Verse Short Elite brings comfort to any riding position thanks to a lightweight package and targeted support, backed by a versatile design that’s optimized for any rider, any gender, and any discipline. A full cutout provides long-haul comfort and Wing Flex allows the saddle’s edges to flex and adapt to riders’ inner leg movement and pelvic rotation. Product details: - Short profile provides targeted support for riders of any gender in a performance riding position - Wing Flex allows the shell's edges to adapt to rider's inner legs movement and pelvic rotation - Full saddle cutout minimizes soft tissue pressure for lasting comfort and performance - Featherweight shell with Austenite rails that are lighter and stronger than hollow titanium - Elite-level trim optimizes foam padding for added lightweight comfort - Multiple widths and extended rail clamping area give more fit options - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Blendr accessory mounts offer clean integrated mount for rear Flare light Features: For men, for women, for mountain, for road. Verse Short is designed to add comfort for all genders. It's your go-to performance posture saddle for both trail and road. Short profile The short profile provides targeted support and a performance riding position for all genders. Wing flex Wing flex allows the saddle shell's side edges to flex and adapt to a rider's inner leg movement and pelvic rotation. Full-length cutout A full saddle cutout minimizes soft tissue pressure for lasting comfort and performance.

Made with recycled materials, this lock-on grip with a unique tread pattern and thick profile adds comfort and control on technical trails. Lock on to the trail Confidently handle any trail with the SE Elite Recycled Grip made with recycled plastics in the core. This lock-on grip uses clamps to secure the core for a tight hold in any terrain, while a unique opposing tread pattern provides the perfect amount of traction and padding for your palms. Using recycled materials in this product helps provide second life to unwanted end of life plastics. Product details - Grip core is made from recycled plastic - Opposing tread pattern absorbs shock in palms and increases grip at fingertips - Rubber compound provides confident grip, control, and comfort - Tread features continuous channels to funnel sweat for effective moisture management - Single-clamp design maximizes grip surface for secure, predictable performance - Core-lock clamp eliminates slipping by securing grip core to bar - 3mm M4 bolt increases hold and resists stripping - 32mm diameter - Length: 130mm - Weight: 115g Features: The net effect Fishing nets make up an estimated 10% of all plastic in the ocean. What's even worse is that they're 4 times more harmful to the ocean environment than all other forms of plastic pollution. A global issue Each year 18 billion pounds of plastic enters the ocean, polluting beaches and waterways around the world. Better products for a better planet We're committed to lightening our footprint and designing for circularity wherever possible. This product and others contain recycled material and are made using planet-friendlier manufacturing processes.

- Grade 10 chromium steel balls

Replacement handlebar display unit specifically for your Townie GO! 7D bike. Product details: - 22.2mm handlebar mount - Compatible with Townie GO! 7D only

SRAM's MRX Comp Twist Shifters are simple to use and offer solid shifting and reliable construction. They shift a 2:1 Shimano rear derailleur.

- MODEL NO: CS-HG400-9 - SERIES: SHIMANO ALIVIO M4000 Series - Compatible chain: HG 9-speed - Speeds: 9-speed - Type: HG

Shimano Deore XT RT-MT800 Center Lock disc brake rotors feature an advanced heat-dissipating design. - Rotor construction uses Shimano Freeza technology to boost heat dissipation and reduce fade - Quick and easy installation with spline mount and lock ring (included) - Compatible with metal and resin pads

SRAM's PowerGlide PG-820 Cassette is a fine 8-speed cassette. It features steel cogs with SRAM's DuraBlast technology for smooth, precision shifting and excellent durability.

Unparalleled comfort A carbon road handlebar with IsoCore that reduces road vibration by 20% and features a variable compact radius that offers additional ergonomic positions. Chain-rattling pavement is no longer an issue thanks to our innovative IsoCore technology in this Pro IsoCore VR-CF road bar. An additive to the carbon layup, IsoCore mutes 20% more vibration than other carbon bars. Features Di2 compatible ports for clean internal wire routing when integrated with Shimano EW-RS910 bar-mounted Di2 junction. Once you experience the comfort and control of IsoCore, you'll never want to ride another bar. - OCLV carbon with IsoCore continuous inner-laminar technology - Replaceable IsoZone EVA pads maintain original grip diameter - Variable Radius Compact Flare (VR-CF) bar shape offers greater comfort in all hand positions - IsoCore technology decreases road vibration by 20% over traditional carbon bars - Compatible with clip-on aero bars - Includes four replaceable EVA IsoZone pads for tops and drops - Compatible with Shimano EW-RS910 bar end Junction-A for cleaner Di2 routing

Bar end plugs (2)

Ellipse Relaxed features a central anatomic hole for pressure relief and 3D Skingel to guarantee maximum comfort in the ischial and perineal areas. To guard against impacts and abrasions, the Ellipse also features Double Cover, a double-layer material applied to the sides of the saddle to double resistance against impacts and abrasions. Rear elastomers are added for better shock absorption — they're effective for even the most severe and unexpected shocks, and work both vertically and horizontally for safe, silent, and permanently non-deformable performance. A patented clip system is positioned at the rear of the saddle for easy attachment of a Selle Royal saddle bag or other accessories.

SRAM's PC 830 Chain offers accurate shifting, excellent durability, and superior power transfer for 8-speed drivetrains.

SRAM's CenterLine rotors are light-weight, quiet, smooth and robust, featuring a two-piece design with an aluminum center and steel brake track.

The classic Oury feel updated with lock-on from ODI. Bonus pack includes snap-caps and Lock Jaws. - Made by ODI - Snap-caps and Lock Jaws included

With a focus on reduced weight and cross-country tuned stopping power, Shimano SLX M7120 brakes provide intuitive modulation so that you can explore your limits with confidence. The BL-M7100 levers feature an optimized lever axle position, an additional handlebar contact point for greater stiffness, and refined ergonomics for rider comfort. At the caliper end, the BR-M7120 4-piston caliper is optimized for the toughest enduro trails. - 10% stiffer than previous generation M7000, even under high-temp conditions - Quicker brake engagement with shorter free stroke - Tool-free lever reach adjustment - I-SPEC EV Clamp Band enables optional integrated shifter setup - Includes finned metal pads

The perfect fit The Bontrager Elite Blendr Stem provides easy solutions for accessory integration. This alloy stem is light and strong, and it gives you endless options to integrate lights, a computer and more with Blendr accessory integration. Product details - Blendr Elite allows seamless accessory integration - 4-bolt dual band clamp retains stiffness and reduces weight - Opposing 2-bolt steerer tube clamp - Uses M5 countersunk, corrosion-resistant steel bolts with 5.2Nm torque spec - Approved for carbon bars and steerer tubes - Suitable for both MTB or road use - Includes Blendr mono base and accessory mounts

Instantly add comfort to your existing saddle with a cushy Bontrager Gel Saddle Cover. Rubberized on the underside to help it stay firmly in place, Bontrager's Gel Saddle Cover installs in seconds, thanks to a drawstring and toggle closure retention system.

The drag-defying profile of Bontrager's Elite Aero VR-CF Handlebar is proven to save up to 23 seconds per hour over a traditional round handlebar. Take advantage of the shaped 6066-T6 aluminum and internal routing, and bring your ride's aerodynamics to the next level. - Custom-butted, 6066-T6 alloy construction - Variable Radius Compact Flare (VR-CF) increases wrist clearance for ergonomic positions - Compatible with clip-on aero bars - Aero drop bar profile is more aerodynamic compared to traditional round bars - Internal cable routing for Di2 and standard housing - Laser-etched brake lever position lines for spot-on control setup - UCI compliant

This classic bar tape combines the traditional feel of natural cork with the vibration damping power of gel for a comfortable ride feel and a clean aesthetic that will never go out of style. It's easy to install and comes with Bontrager finishing strips and bar end plugs. - Gel tape with natural cork feel - Ideal stretch for quick and easy installation - Inner gel strip for extra comfort - Finishing strips and reflective Bontrager bar end plugs included - Non-adhesive backing

Platform pedals with a durable nylon design and replaceable pins for consistent grip. - Durable nylon body with a proven shape for comfort and confidence - Virtual concave design with pin placement secures your shoe for pedaling and descending - Durable axle spins on sealed cartridge bearings - Replaceable steel traction pins - Install with 8mm hex wrench

Shimano's M540s are race-ready clipless pedals that don't require a team budget. These rugged, light beauties feature dual-sided Shimano SPD bindings that are easy to enter and exit and deliver excellent power transfer and maneuverability. The bindings are adjustable for dialing in the perfect tension and these sweet pedals have an open mud-shedding design to prevent clogging. Plus, the M540s are built to last with chromoly axles and sealed-cartridge bearings. - 352 grams (pair)

The PC-951 is SRAM's most economical PowerChain and maintains their high standards of quality. It boasts tough chrome-hardened pins for durability and accurate shifting. And, with its great PowerLink, you don’t even need tools to install it.

A fitness saddle with a patented fluid technology that moves freely with you as you pedal for less pressure and more comfort. Bontrager's Commuter Fluid Saddle moves with you to reduce pressure on fitness rides and commutes. The patented fluid technology performs better than standard gel—and it's paired with air foam and a full cutout for soft tissue protection and support. Plus, you can easily attach a Flare tail light to the rear-facing Blendr mount! Product details - Fluid adds comfort by moving with you as you pedal to alleviate pressure - Fluid is better than gel at reducing pressures, showing an average reduction of over 20% in peak pressure compared to gel alone - Full cutout provides targeted support and soft-tissue relief - Dual-density shell and air foam construction is soft yet supportive - Blendr attachment allows for integrated rear light mounting - inForm saddles utilize the latest in biomechanical research to maximize performance and rider comfort - The Unconditional Bontrager Guarantee offers 30 days to love it, or we'll take it back

- 1-Piece, molded, cage-style body - Loose ball bearings - Accepts toe clips/straps - Spindle Material: Chromoly - 305g

When it's time to replace your old 8-speed cassette, check out SRAM's PG-850. Its steel construction and SRAM's PowerGlide technology combine to deliver miles of solid shifting and outstanding durability.

Shimano's M520s are affordable clipless pedals that are easy to enter and exit, and built to last. They boast dual-sided Shimano SPD bindings, which make them perfect for mountain bikers or roadies who prefer wearing walkable shoes with recessed cleats. The bindings are adjustable for dialing in the perfect entry and exit tension, and they have an open, mud-shedding design that prevents clogging. Chromoly axles and sealed bearings add tons of durability. - 380 grams (pair)

A comfort saddle with a patented fluid technology that moves freely with you as you pedal for less pressure and more comfort. Bontrager's Boulevard Fluid saddle puts your comfort first with patented fluid technology that moves with you to reduce pressure while you're pedaling. The full cutout design and air foam deliver a difference you can feel on casual cruises through your town and neighborhood. Plus, it has an integrated mount for a tail light! Product details - Fluid adds comfort by moving with you as you pedal to alleviate pressure - Fluid is better than gel at reducing pressures, showing an average reduction of over 20% in peak pressure compared to gel alone - Full cutout provides targeted support and soft-tissue relief - Dual-density shell and air foam construction is soft yet supportive - Blendr attachment allows for integrated rear light mounting - inForm saddles utilize the latest in biomechanical research to maximize performance and rider comfort - The Unconditional Bontrager Guarantee offers 30 days to love it, or we'll take it back

Feel the difference The inForm Satellite Plus IsoZone system is the comprehensive defense against hand and wrist discomfort. By pairing integrated elastomer handlebar inserts with advanced ergonomic grips, this bar and grip combo reduces peak hand pressure by nearly 30% while reducing vibration and absorbing impact for a smoother, more enjoyable ride. Product details - Custom-butted, 6061-T6 alloy construction - IsoZone elastomer inserts offer reduced upper body fatigue - Performs best when combined with inForm IsoZone grips (included) Specifications - Backsweep: 9 deg. - Upsweep: 4 deg. - Material: Alloy - Weight: 487g

Size specific composite platform pedal with optimal shoe/pedal interface. - Optimal surface area - Minimal profile 13mm thin - 9 hex traction pins per side - Premium bearings & seal system - Stamp large recommended for shoe sizes: 10-15 (us) // 43-49 (eu) - Body Material: Composite - Footprint: 111mm x 114mm - Hex Traction Pins: 9 per side (mounted from back) - Inner Bearing Type: Igus LL-glide bearing - Outer Bearing Type: Enduro cartridge bearing - Shoe Size: 10-15 (us) // 43-49 (eu) - Spindle Material: Forged scm 435 chromoly steel - Warranty: 5 years - Weight: 329g per pair

A gravel handlebar with a wider flare that gives riders more comfort and control through any terrain. The bar with a flare for adventure The GR Elite Road Handlebar is a lightweight alloy bar designed to give gravel and adventure riders more comfort, control, and confidence, especially when in the drops. IsoZone EVA pads deliver entire-ride comfort, while the bar's 75mm reach, 128mm drop, and 13-degree flare make it easy to access brake levers and shifting controls from all riding positions. Product details - 13-degree flare allows for more control in the drops - Custom-butted, lightweight 6061-T6 alloy construction - Shorter reach and wider flare allows for confident handling and easy access to controls - Replaceable IsoZone EVA pads add comfort while maintaining original grip diameter - Compatible with Shimano EW-RS910 bar end Junction-A for cleaner Di2 routing - Laser-etched brake lever position lines for spot-on control setup - Compatible with clip-on aero bars

If you're suffering from a slipping seatpost, Surly has the remedy. The Constrictor Seatpost Clamp grabs your post tight and hangs on for dear life. It's machined from anodized aluminum billet, uses an 8mm bolt for ultimate strength, and can accommodate a rear cantilever brake hanger.

Our most versatile performance saddle offers a full cutout for targeted support and soft tissue pressure relief for riders of all genders and all disciplines. For mountain, for road, for men, for women Our most versatile performance saddle puts you in a power posture for speed and control wherever you ride—and it’s available in an wide range of sizes to ensure you get the fit you need. A full cutout ensures long-haul comfort for all riders and all terrain. Plus, it has longer saddle rails to tailor your fit and an integrated Blendr mount for a Flare tail light. Product details - Saddle design supports riders of all genders in a performance riding position on road and mountain bikes - Full saddle cutout minimizes soft tissue pressure for lasting comfort and performance - Lightweight shell provides balance of weight, strength, and compliance - Comp-level trim optimizes foam padding for added lightweight comfort - Multiple widths and extended rail clamping area give more fit options - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Available Blendr accessory mounts to cleanly integrate rear light

Genuine replacement parts Revive your ride with a fresh set of bearings for your BB90/95 equipped carbon bike. Proprietary replacement bottom bracket for the Trek family of bikes. - Only compatible with 24mm cranks - Not compatible with BB30 cranks

Handlebar tape that's made from partially recycled materials and designed for a comfortable, durable, and tacky grip feel. Tape for confident and comfortable riding Perfect for white-knuckle crits, 100-mile gravel rides, and weekend adventures, EcoTack handlebar tape has a tacky, confidence-inspiring grip with vibration-damping comfort. Plus, It's made from partially recycled material. - 3mm of shock-absorbing foam elevates comfort - Super-tacky texture offers a no-slip grip - Made from 45% recycled materials and 29% biobased foam - Ideal stretch for quick and easy installation - Adhesive backing simplifies installation - Finishing strips and reflective Trek bar end plugs included - Weight: 108g

Key features: - Designed for use on carbon rims - Confirm wheel compatibility before use - Use in mud and grit will accelerate rim wear - 520554 is the Shimano style Flash Evo and fits Shimano and SRAM - 520555 is the Campagnolo style Race Pro

Trek proprietary suspension hardware. - Designed for 2022-2023 Session 29 - Refer to Service Manual for assembly instructions and service

Genuine replacement parts Revive your ride with a fresh set of bearings for your BB90/95 equipped carbon bike. Proprietary replacement bottom bracket for the Trek family of bikes. - Only compatible with 24mm cranks - Not compatible with BB30 cranks

SRAM's PC-1 Single Speed Nickel Chain is designed for singlespeed bicycles so it won't jump off when you're laying down the power. It comes with a connector link for easy installation and removal.

Key features: - Blendr works with this simple formula: Stem + Base + Mount. Add accessory. - Bases for use with the Madone KVF Aero Integrated Bar/Stem - Add any XXX accessory mount (sold seperately) for an elegant, integrated look

Get that fresh cleat feel These solidly-built cleats work with Bontrager road pedals or any Look Cycle’s KÉO-compatible clipless pedals. Whether you're looking for replacements, need a new set for a new pair of kicks, or just like to keep an extra pair in your toolkit. Product details - Replacement cleats for all Look Cycle’s KÉO®-compatible road pedals - Directly compatible with Bontrager Comp Road pedals - Set includes 1 pair

Genuine replacement parts Get back on the road with a genuine replacement stem For optimal adjustability. - Bontrager adjustable stems - Available in several lengths - Includes M6 x 40mm bolt

Clean up your Bontrager Elite stem cockpit with Blendr Elite bases. Blendr works with this simple formula: Stem + Base + Mount. Add accessory. Key features: - Bases for use with Elite stem - Add any XXX accessory mount for an elegant integrated look

Ellipse Athletic features a central anatomic hole for pressure relief and 3D Skingel to guarantee maximum comfort in the ischial and perineal areas. To guard against impacts and abrasions, the Ellipse also features Double Cover, a double-layer material applied to the sides of the saddle to double resistance against impacts and abrasions. Additionally, it has a patented clip system positioned at the rear of the saddle for easy attachment of a Selle Royal saddle bag or other accessories.

Key features: - Original equipment replacement saddle ears for use with Bontrager saddles with carbon rails - Compatible with Bontrager and Trek rotary head seatpost and seat mast systems - Consult with manufacturer on compatibility with other saddle brands

Z6 is a basic, affordable replacement chain for use on 6 and 7 speed bikes. - Features inner plate chamfering to smooth shifting - Z-bridge shape - Links (links): 116 - Width: 7.3 mm - Drivetrain Speeds: 6 , 7 - Chain Connection Type: Reusable Master Link

Shimano Dura-Ace 9000 11-Speed Chainrings. - Chainring BCD: 110 Shimano Asymmetric - Color: Silver/Black - Defined Color: Silver - Drivetrain Speeds: 11 - Material: Aluminum - Ring Position/Type: Outer

Get back on the road with a replacement handlebar for your cruiser bike. Customize your bike with a new handlebar that fits your own personal style. PRODUCT DETAILS - Traditional 35 degree back sweep handlebar - 6061-T6 polished aluminum with anodize finish - RIDE+ versions have an integrated cable guide inside

Pro's Smart Silicon Handlebar Tape is soft to the touch for top comfort. Plus, it's made of EVA foam for an excellent grip and total control even in the wet. This great tape is also durable and features adhesive backing for easy wrapping and a stay-put hold.

- 1/2" x 11/128" - 116 Links - EPT anti-rust coating - 9-speed - Compatible with Shimano, SRAM & Campagnolo 9 Speed Systems - Mushroomed Pin Riveted - 277 grams

Run your favorite 31.8mm clamping diameter handlebar on a bike with Knock Block with the Rhythm Comp 31.8. It adds Knock Block compatibility to a durable stem with multiple lengths to let you fine-tune the fit to your ride. Get 31.8mm handlebar compatibility with your Knock Block system;Also compatible with standard headsets and spacers;Knock Block system protects frame from impacts by fork and handlebars by eliminating over-rotation of bars;Available in a wide range of sizes for today's mountain rider;See Service Parts for other Knock Block parts;

A light and lean performance saddle developed directly with Lidl-Trek athletes for comfort through the toughest races. - Race Shop Limited design was developed for the needs of Lidl-Trek athletes - OCLV Carbon shell provides a perfect balance of weight, strength, and compliance - Short profile provides targeted support for riders of any gender in a performance riding position - Full saddle cutout minimizes soft tissue pressure for lasting comfort and performance - Minimally bonded padding shaves weight and creates a sleek, high-end aesthetic - Oversized carbon rails for lightweight strength (specific seat post rail clamps required)

Get back on the road with a genuine replacement fork. Details: - Original equipment replacement forks for Émonda SL bikes - Color matched for direct compatibility - Rim brake models use direct-mount brakes

The RD-M9100 XTR rear derailleur is intended for use with 1x drivetrains. It is compatible with both 11- and 12-speed cassettes. - Decreased rear derailleur tension at low gear position, to prevent high chain tension - Added bumper at rear derailleur pulley cage - Bigger 13T pulley - Direct mount compatible - Compatible cassette size: 10-51 (12-speed), 10-45 (11-speed) - Total capacity: 35t (GS Medium Cage) / 41t (SGS Long Cage)