Parts

An aggressively styled youth tire for all-condition riding, our Roller tire is the perfect tire for your kids to learn how to shred. - Casing: 22 TPI - Bead: Wire - Compound: 70a - Flat Protection: Flak Jacket - 12 x 2.125", PSI Max 40, approximate weight 280g

An aggressively styled youth tire for all-condition riding, our Roller tire makes the perfect tire for your kids to learn how to shred. - Casing: 30 TPI - Bead: Wire - Compound: 70a - Flat Protection: Flak Jacket - 20 x 2.125", PSI 35-100, approximate weight 580g

Upgrade to Specialized's Romin Evo Comp Gel Saddle and enjoy comfort like never before. Its extended cutout, Body Geometry ergonomics and lightweight padding with gel all ensure that no matter how far you ride, you'll feel great. Plus, the Romin boasts hollow-chromoly rails and a durable, water-resistant Micromatrix top. And, it's available in 3 widths for a perfect fit.

Perfect for your cruiser or urban commuter, The Cup is an extra-wide, supportive saddle that cradles your sit bones while you ride to provide comfort mile after mile. Couple that with super-supple honeycomb gel padding, and you get a Body Geometry saddle that’s ready to help you lift your fitness game, stay active, or take the scenic route on ‘round town errands. - Body Geometry V-groove design improves comfort and increases blood flow in critical areas - Extra-wide, ergonomic design for upright, relaxed comfort - Honeycomb gel padding to cradle your sitbones - Elastomer rail suspension for instant, plush comfort - Tough, lightweight, water-resistant Micromatrix cover - SWAT-compatible mounts allow for sleek and integrated storage solutions - Level 6 padding: Ideal for commuting and casual riding

- Shimano 105 R7000 Series CS-HG700-11 cassette - Average weight: 379g - Combination: 11-13-15-17-19-21-23-25-27-30-34T

The Shimano Altus 3x9 speed front derailleur offers light action and improved clearance for wide tires and mud. - 50mm chainline - Chrome-plated cage - 9-Speed

The Shimano Altus rear derailleur brings Shadow technology and wide-range capability to 9-speed drivetrains - B tension spring for quick and easy wheel installation and removal - Super low-profile concept with SHADOW mechanism - Wider linkage ensures durability and more precise shifting - Easy adjustment and maintenance - Direct mount compatible - Maximum cog size: 36t - Total capacity: 45t

This Shimano hydraulic disc brake and lever set combines a BR-M500 caliper with a Deore BL-MT501 lever, offering a perfect set up for XC to trail that delivers high-powered mountain biking SERVO WAVE performance. - Sleek and stable 2-piston caliper - Smooth and durable master cylinder design - Reliable power and rigid brake design - Insulated pad and piston - 2-finger lever design with adjustable reach - I-spec II lever clamp band provides more space and a cleaner appearance on the handlebar - J-Kit for simple hose connection

SHIMANO DEORE - 126 links for HG 12-SPEED - MTB Chain The M6100 chain provides smooth shifting and enhanced chain retention thanks to an extended portion of the inner plate. The new chain features QUICK-LINK assembly and is optimized for HYPERGLIDE+ cassettes and DYNAMIC CHAIN ENGAGEMENT+ chainrings. - Proprietary design ensures smooth shifting and strength - Extended inner plate improves chain engagement and retention - Shorter shift times and less pedaling shock - Optimized to work with HYPERGLIDE+ cassette sprockets and DYNAMIC CHAIN ENGAGEMENT+ chainrings

Shimano wrote the book on mountain bike shifting, and their Deore Rapidfire Shifter Set carries on that tradition. Light, smooth action is paired with decisive shifts for fast and easy on-trail gear changes. The left shifter incorporates a mode converter so these components can be used with either 2x or 3x drivetrains.

Shimano Deore M6000 Series 10-speed cassette. - Cogs: 11-13-15-17-19-21-24-28-32-36T

Shimano's Deore Hydraulic Brakes offer true performance at an entry-level price. Servo Wave lever actuation is a direct trickle down from Shimano's race-winning, pro-level disc brakes, with shorter lever stroke, increased pad clearance, and insane power right at your hands. I-Spec compatible design streamlines your handlebar setup by mounting your brake levers and shifter pods (sold separately) to the same clamp. Installation and adjustment is fast and easy thanks to the brake caliper's post-mount design, and the hydraulic line is pre-bled. Just mount them up and hit the trails!

Shimano's Deore Shadow+ Rear Derailleur is loaded with mountain bike technology. The Shadow design tucks the rear derailleur closer in to the wheel, reducing damage from rocks, roots, and trail obstacles. When it comes to gear changes, Shimano's Dyna-Sys supplies consistent, smooth shifting across the entire cassette. And the Shadow+ clutch maximizes chain control by virtually eliminating chain slap and excess noise with its integrated cage-tensioning clutch. - Medium Cage (for 2x10 drivetrains) - Long Cage (for 3x10 drivetrains) - For use with Shimano 10-speed drivetrains - High-efficiency drivetrain for aggressive trail riding - Optimized gear combinations and ratios for trail riding - Maximum chain wrap capacity: 41T (medium cage)/43T (long cage) - Largest cog: 42T (medium cage)/36T (long cage) - Compatible with wide range cassette - Silent and stable for technical trail riding - Improved stability and chain retention longevity - Light shifting effort - OPTISLICK cable - Smooth and precise shifting - DYNA-SYS compatible system

Shimano's XT Ice-Tech rotors use a 3-layer sandwich of steel, aluminum and steel which reduces the temperature of the braking surface. This means quieter braking, and more importantly, less fade on long downhill sections , plus improved pad life. The various sizes give you total freedom of choice over the delicate balance of power versus weight.

Shimano's Deore XT Dyna-Sys 10-Speed Front Derailleur sports a lightweight aluminum cage that's chrome plated to reduce wear. Wide parallel pivots provide fast, smooth, and reliable shifts every time. This is an e-type front derailleur that mounts under your bottom bracket cup.

Shimano G04S metal disc brake pads. - Fits XTR BR-M9000, BR-M9020, BR-M985, XT BR-M8000, BR-M785, SLX BR-M666, Alfine BR-S700 and BR-R785, BR-RS785 road disc calipers - Sintered Metal pad with consistent, high stopping power in wet or dry conditions and excellent durability - Ventilated steel backing plate for improved heat dispersion - Backing Plate Material: Steel - Compound: Metal

- Wide pedal-to-shoe contact - Lower platform height for pedaling stability - Integrated cage increases stability and control when not clipped in and protects binding mechanism against impacts - Robust retention claws provide smooth engagement and release - Customize the entry and release tension settings - Strong, durable chrome-molly spindle with 8 mm hex wrench mount - Sealed mechanism - 1.0 mm cleat spacer included - Binding Dual sided - SM-SH51 Cleat included - Cleat retention adjuster - Integrated cage - Cartridge axle - Average weight: 438g - Optional cleat: SM-SH56 - Pedal Type: Off-Road (SPD)

- Deore/Tiagra 9-speed compatible - 3/32-inch - 116 links

Shimano HG-800 11-speed cassette. - High-performance gear combinations provide superior rider choice - With hub body for MTB to fit a variety of bikes from MTB to road - Average Weight: 335 grams

- Pair of J-Type disc brake pads with fins, for 1 caliper - Available with resin or metallic compound - Fits 2-piston SLX and XT calipers from 10 to 12 speed groups and 10 or 11 speed XTR brakes - Ice Technologies fins & aluminum backplate cools down the brakes in use, which improves braking consistency and power and reduces brake fade during long, technical dowhnill stretches - Longer lasting than G-type pads - Interchangeable with F-Type and G-Type pads - Includes spring and pin

K04S Disc Brake Pads - Compatible with Shimano Models: BR-M9100, BR-M9110, BR-M8110, BR-R9270, BR-R8170, BR-R9170, BR-R8070, BR-R7070, BR-4770, BR-RS805, BR-RS505, BR-RS405, BR-RS305, BR-U5000, BR-RX810, BR-RX400 - Sintered Metal pad provides consistent, high stopping power in wet or dry conditions with excellent durability - Ventilated stainless steel backing plate for improved heat dispersion

- Pair of L-Type brake pads with fins, for one caliper - Ice Technologies fins & aluminum backplate cools down the brakes in use, which improves braking consistency and power and reduces brake fade, especially in long descents - Choice of compound: Resin, for improved modulation & lower noise, or Metallic, for improved durability & higher braking power in muddy conditions - Longer lasting than K-Type pads - Interchangeable with K-type finless pads - Fits all Shimano flat mount gravel & road disc calipers, including Dura Ace BR-R9170, Ultegra BR-R8070, 105 BR-R7070, GRX BR-RX810 and BR-RX400 - NOT compatible with XTR BR-M9100

- Shimano, BR-7900 R55C3 Replacement cartridge pads, pair - Also fits BR-6700 and BR-5700

Reliable and Durable 2-Bolt Cleat Small details make a big difference—especially when it comes to mountain biking. Worn-out cleats can lead to poor pedal function including premature or stubborn release. But swap on a new set of Shimano SM-SH51 Cleats and you know they're purpose-built to work seamlessly with nearly all Shimano SPD Pedals, delivering long-lasting performance thanks to their heat treated forged steel construction that will stand up to even the harshest riding conditions. Features: - Shimano SM-SH51 SPD Cleats come stock with all Shimano SPD pedals and are the go-to choice for mountain bikers, indoor cyclists, and anyone looking for a durable and reliable 2-bolt cleat. - Customizable: Engineered specifically to work with nearly all Shimano SPD pedals, which allow you to micro-adjust the spring force required to clip in and out of your pedals - Secure Engagement: Deliver 4 degrees of float, which assures just the right amount of movement while also providing a secure connection to your bike - Ease of Disengagement: Feature a 13-degree clip-out angle, allowing you to quickly get out of your pedals when the need arises - Built to Last: Made from heat treated forged steel that delivers durable long-lasting performance even under the most severe riding conditions PREDICTABLE ENGAGEMENT With 4 degrees of float, Shimano SM-SH51 Cleats permit just the right amount of movement for critical on-the-fly weight shifts while still delivering the secure cleat-pedal engagement needed to confidently tackle technical terrain. USER FRIENDLY Shimano SM-SH51 Cleats are compatible with nearly all Shimano SPD pedals, which allow you to micro-adjust how hard or easy it is to clip in and out, providing an unmatched level of customization. These cleats also feature a 13-degree clip-out angle, meaning with the simple outward twist of your heel you can quickly get out of your pedals when the need arises.

- Internal cable routing for lighter steering action and a clean handlebar area - Effortless and accurate shift operation - Ergonomic brake lever - Clean internal cable routing - Engineering plastic bracket body - Aluminum main lever - Adjustable reach - Compatible only with FD-4703 front derailleur

Shimano's Tiagra Flat Bar Brake Levers offer powerful and confident braking for bikes with flat bars. Their aluminum lever blades are ergonomically curved for a controlled grip.

Compatible with DUAL SIS index shifting, the Shimano Tourney TY front derailleur is perfect for 3x7 and 3x6 speed drivetrains. - Action: TOP SWING - Angled clamp band design - Applicable Top-Mid tooth difference: 8T - Chain line: 47.5/50mm - Chain stay angle: 66-69 - Top gear teeth: 42T - Total capacity: 18T

Compatible with DUAL SIS index shifting, the Shimano Tourney TY front derailleur is perfect for 3x7 and 3x6 speed drivetrains. - Action: TOP SWING - Angled clamp band design - Applicable Top-Mid tooth difference: 10T - Chain line: 47.5/50mm - Chain stay angle: 66-69 - Top gear teeth: 48T - Total capacity: 20T

Shimano XT RT86 6-Bolt Disc Rotor - 3-layer structure with aluminum core and two stainless steel outer layers reduces rotor surface temperature approximately 100 degrees Celsius compared to all-steel rotors - Aluminum spider - Includes rotor fixing bolts and non-turn washers - Hub/Disc Compatibility: 6-Bolt Disc - Weight: 173 g - Rotor Size (mm): 203 mm - Rotor Type: Two Piece - Pad Compatibility: All Pad Compounds

Classics. Tires in traditional sizes and classic tread designs. Active Line quality. K-Guard puncture protection. Wired tires.

- Whether you're travelling on tarmac or trail, the beefy Super Moto-X offers you the best riding characteristics and plenty of comfort. - The 3 mm Green Guard puncture protection and reinforced sidewalls lets you reach your destination safely, even in the toughest conditions.

SRAM's 3.0 Twist Shifters are simple to use and offer solid shifting and reliable construction. Using SRAM's 1:1 actuation ratio technology, the 3.0s are easy to set up and easy to adjust. Plus, with a simple twist of the wrist, you can shift a handful of gears at once.

- Replacement bolt for DUB cranks

The high torque loads of E-MTBs require tough components. The straighter chain line EX1 offers allows the use of a chain that is wider and more robust than those found on drivetrains not specifically engineered for E-MTBs. The EX1 chain has been engineered to run quiet across the gear range and transmit more power to the rear wheel. - EX1 chain is wider and designed for the high-torque, heavy-duty use of E-MTB - Compatibility: 10-speed - Chain length: 144 links

It’s simple. It’s about performance. The pure shifting performance of Eagle AXS is the real difference maker. Shift under load, over the roughest terrain, uphill, without changing your grip on the bar. Eagle AXS changes your level of control on the bike when you’re under pressure and pushing hard into the red. But more than that, it changes your relationship with the bike. No cable, housing or wires to manage opened up design and engineering possibilities with the Eagle AXS controller. Helping us pioneer a completely new shifting experience with new ergonomic touchpoints that take just enough effort to press. Touchpoints that are totally customizable to your preferences, allowing you to choose which button does what through the AXS App. - Compatible with MatchMaker X - Eagle technology - Customize in-board and outboard shift options - Pairs with both XX1 and X01 Eagle AXS derailleurs - AXS enabled componentry software that makes it possible to both program and personalize new SRAM and RockShox components - System is completely water and dust proof to IP69K

Beyond an incremental improvement. The Flattop technology of the SRAM Force chain creates a lighter, quieter, stronger chain. Ride far, long and fast—this chain can go the distance. - Flattop technology allows for a narrower chain with quieter operation and increased strength and durability - Hard Chrome plated inner and outer plates for faster and more precise shifts

SRAM's Force 22 Front Derailleur gives you the freedom to shift with incredible speed into either chainring. Experience precision shifting with YAW technology that allows the cage to rotate to better align with the chain and eliminates the need for shifter trim. An integrated chain spotter is included for seriously bumpy roads and cyclocross action. Paired with SRAM's X Glide R chainrings, unmatched front shifting will be the norm on your bike.

Incredibly fast, astonishingly quiet, and impressively precise — fly through all 11 gears with SRAM's Force 22 WiFLi Rear Derailleur. It takes advantage of SRAM's Exact Actuation technology for precision shifts every time. Carefully shaped jockey wheels work together with the sculpted cage for lightning-fast, ultra-precise shifts, and an elastomer coating applied to the jockey wheels makes for extra quiet operation. A carbon outer cage, aluminum inner cage, and magnesium inner link keep the Force 22 WiFLi at a svelte 190 grams. The WiFli version shifts up to a 32T max cog for a super-wide gear range.

- Unique link shape creates a lighter, quieter, stronger chain. - Flattop technology allows for a narrower chain with quieter operation and increased strength and durability - Hard Chrome plated inner and outer plates for faster and more precise shifts

Designed for the next generation of drivetrains and the next generation of riders. The SRAM Force XG-1270 cassette is optimized for electronic shifting and features our X-Range gearing technology. Smooth, precise shifts, from 10T on up. - Features at least five one-tooth jumps for a smoother gear progression - 10-tooth start helps provide a wider gearing range - Designed to work with an XDR driver body - MINI CLUSTER construction reduces weight and increases durability - All Zipp wheels starting from 2012 are XDR-ready - SRAM Force XG-1270 cassettes sold prior to 2021 have a black finish. In 2021, the design was updated to a nickel-chrome finish.

SRAM's GX 1x11 X-Horizon rear derailleur is engineered for smooth, reliable shifting action—from the larger upper pulley offset to the 12-tooth X-Sync pulley wheels. By eliminating unwanted chain movement, this X-Horizon rear derailleur shifts faster, puts an end to ghost shifting, and reduces shift force and chain slap. And with Cage Lock technology, wheel removal and installation are easier than ever. • Long cage • X-Horizon design reduces shift force, ghost shifting, and chain slap • 12-tooth X-Sync pulley wheels • Large upper pulley offset automatically adjusts chain gap • Sealed cartridge bearings • Aluminum Cage

Get sharp, dependable, Exact Actuation shifting with SRAM's GX 2x10 Rear Trigger Shifter. This right-side rear shifter is compatible with SRAM’s GX 2x10-speed components and offers precise, swift shifting across their wide-range 10-speed cassette. • Dedicated 10-speed rear trigger shifter • Multi-position mounting • Aluminum pull lever • MatchMaker X compatible • Weight: 122 grams

Get sharp, dependable X-Actuation shifting with SRAM's GX 2x11 Rear Trigger Shifter. This right-side rear shifter is compatible with SRAM’s 2x11-speed components, offering precise, swift shifting across their wide-range 11-speed cassette. • Dedicated 11-speed rear trigger shifter • Multi-position mounting • Discreet clamp • Aluminum pull lever • MatchMaker X compatible • Weight: 122 grams

Simplicity and performance made for all day adventures. The pure shifting performance of Eagle AXS is now available with GX. Shift under load, over the roughest terrain, uphill, without changing your grip on the bar. GX Eagle AXS changes your level of control on the bike when you're under pressure and pushing hard. More than that, it changes your relationship with the bike. No cable, housing or wires to manage opened up design and engineering possibilities with the GX Eagle AXS controller. Featuring the proven ergonomic touchpoints that make shifting effortless, they are customizable to your preferences, allowing you to choose which button does what through the AXS App. - AXS enabled componentry software makes it possible to both program and personalize compatible SRAM and RockShox components - Touchpoints are totally customizable to your preferences, allowing you to choose which button does what through the SRAM AXS App - Customize inboard and outboard shift options - Compatible with SRAM MatchMaker X - System is completely water- and dust-proof to IP69K - Pairs with all derailleurs in the SRAM Eagle AXS ecosystem

Riders want a derailleur that shifts on command, whether under climbing load or sprinting to the stage finish. The GX Eagle AXS derailleur gets it done with everything you have come to expect from our AXS connect components. The GX Eagle AXS derailleur is smart enough to protect itself thanks to its incredibly resilient Overload Clutch. Engineered with a variety of rider preferences in mind, it is compatible with our new expanded range 10-52t cassette as well as our 10-50t cassette. Showcasing its lineage from the proven GX Eagle mechanical line, the GX Eagle AXS derailleur is there for one thing: to do the job. Features - AXS enabled componentry software that makes it possible to both program and personalize new SRAM and RockShox components - Overload Clutch protection - Finished with the GX Eagle master colorway - Battery sold separately Specifications - Speeds: 12 - Cage Material: Steel - Pulley Bearings Material: Steel - Max Tooth: 52

SRAM GX Eagle drivetrains are engineered for optimal performance. Eagle drivetrains are designed, tested, and proven to deliver durable performance for all riders. Eagle technology provides an expanded, optimum gear range and is 100-percent compatible with all levels of SRAM Eagle drivetrain systems. - The GX crankset is engineered for complete chain control with each tooth precisely designed to work seamlessly with the chain’s inner and outer links - The GX Eagle rear derailleur gets the job done with an updated cage architecture that improves chain management and is compatible with both 10-52T and 10-50T cassettes - The XG-1275 10-52T cassette offers expanded 520% gear range and features SRAM's Full Pin technology, making it both lightweight and durable - The trigger shifter puts total control of your gear selection into the thumb of one hand - GX Eagle chain for smooth and efficient shifting - DUB bottom bracket sold separately

SRAM's GX 2x10 rear derailleur provides incredible shifting speed and precision. Exact Actuation technology eliminates slop and shifting variation. Roller Bearing Clutch technology delivers maximum drivetrain stability—even through the most punishing terrain. And with Cage Lock technology, wheel removal and installation are easier than ever.

SRAM's NX trigger shifter with X-ACTUATION technology gives you sharp, dependable shifting. Built for precise and swift shifting across SRAM's wide range 11-speed cassette, the NX trigger shifter brings industry changing technology to everyone. - X-ACTUATION for precise and dependable 11-speed performance - Fully compatible with all SRAM 1x drivetrains - Weight: 142 grams - Speeds: 1 x 11 - Colors: Black

The SRAM NX X-HORIZON rear derailleur provides the same smooth, reliable shifting action as XX1—from the larger upper pulley offset to the 12-tooth X-SYNC pulley wheels. By eliminating unwanted chain movement, X-HORIZON shifts faster, puts an end to ghost shifting and reduces shift force and chain slap. And with Cage Lock technology, wheel removal and installation are easier than ever. - X-HORIZON design that reduces shift force, ghost shifting and chain slap - 12-tooth X-SYNC pulley wheels - Fully compatible with all SRAM MTB 1x drivetrains - Most affordable fully featured 1x rear derailleur in the industry - Speeds: 11-speed - Weight: 322 grams - Color: Black - Compatibility: X-ACTUATION - Bearings: Steel - Cage Size: Long - Max Tooth: 42

The basis of every Eagle drivetrain is its chain—and the NX Eagle chain is designed and manufactured using genuine SRAM Eagle architecture, so it is fully compatible with every other component in the Eagle ecosystem. The NX Eagle chain features solid pin construction, Eagle PowerLock, and smooth, efficient shifting that you can count on every time out. Features/Specs - Eagle PowerLock chain connector with FLOW LINK technology provides better chain-guiding and increased longevity - Unique features and design also provide significantly improved wear resistance on Eagle cassettes and rings - Weight: 278g (126 links) - Material: steel - Speeds: 12 - Compatibility: All levels of Eagle drivetrain systems

SRAM's 1071 chain is lightweight, smooth, and precise-shifting. It features the PowerLock connecting link and HollowPin construction for weight savings with no sacrifice of strength. - SRAM Road 10-speed compatible - HollowPin construction for weight savings with no sacrifice of strength - Features the PowerLock connecting link

SRAM's 1170 11-Speed Cassette is constructed of light, durable materials and boasts SRAM's PowerGlide tooth profiles and shift ramps for quick, positive gear changes. This excellent cassette also sports a semi-spider construction for a maximum stiffness-to-weight ratio, a lightweight aluminum lockring, and is available in three ranges to suit all your riding.

SRAM's PG-730 7-Speed Cassette is the perfect replacement for your worn-out gears. It features a rugged steel construction for awesome durability and SRAM's PowerGlide technology for smooth, precise shifts throughout its 12-32 tooth range.

The all-new SRAM RED chain was redeveloped from the ground up. The unique link shape allows the chain to be narrower and lighter while increasing strength and providing more space between the outer plates of the chain and the cogs on either side. The result: a quieter chain with faster, more precise shifts. - Flattop technology enables a narrower chain with quieter operation and increased strength and durability - Hard Chrome plated inner link plates and rollers for reduced wear and prolonged life - HollowPin construction for increased strength and efficiency - Chain length: 114 links

For unrivaled shifting, upgrade to SRAM's Rival Front Derailleur. Because consistency equals victory, Rival boasts lightweight and durable cold-forged-aluminum construction plus SRAM's Exact Actuation Technology for awesome shifting every time. The Rival shifts beautifully on standard and compact cranksets, too.

Our premier X-Range gearing; which utilizes tight jumps between chainrings and a 12-speed, wide range, 10-tooth start cassette; is now available for Rival. This includes new cassettes that feature smooth, precise shifting in ranges that cover road, gravel, and everything in between. - X-Range gearing gives you more range and a smoother gear progression, so you're always in the right gear - Nickel chrome plating for quiet and durability - FULL PIN construction for durability and light weight - Designed to work with an XDR driver body

Original equipment pads for no-compromise disc brake performance. - Pad Shape Number: 37

This new SX Eagle derailleur is your entry point to the SRAM Eagle Ecosystem. Sharing many features with the rest of the Eagle Ecosystem like the proven SRAM 1x-specific X-HORIZON body design, it can accommodate both 11-50T and 10-50T cassettes. The SX Eagle is cross compatible with much of the Eagle Ecosystem, making it easy to personalize and upgrade your ride when you are ready. - A full featured Eagle derailleur, compatible with the Eagle Colorsystem - X-SYNC pulley technology provides greater efficiency, crisper shifting, and quieter operation - Cage Lock offers discovery-level riders easy wheel removal - 50T max rear cog - Battery Not Included

SRAM's Disc Brake Pads are reliable and rugged. These pads are compatible with Avid Trail and SRAM Guide and G2 disc brakes.

The radical new look and feel of SRAM's X-SYNC 2 Eagle chainring is a direct result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-SYNC chainrings. The longer, positive-rake tooth shape has been designed to work perfectly with the Eagle chain to increase chain retention and overall pedaling efficiency, while decreasing friction, noise and wear. - Can be used with Eagle 12 speed or SRAM 11 speed chains - Direct mount rings with 3mm offset fit Boost geometry Eagle cranks; direct mount rings with 6mm offset fit traditional geometry - Eagle cranks and GXP spindle XX1, X01, X0, X1 and X9 cranks