Shimano's Deore XT Rear Derailleur uses cold-forged construction and cutting edge technology to deliver crisp shifting, real-world reliability, and trademark precision. Plus-type derailleurs use a lever-actuated clutch spring to prevent chain slap, reduce noise while on the trail, and improve chain engagement when riding over rough terrain. Sealed pulley bearings keep things spinning smoothly, and wide plate construction prevents the derailleur from getting clogged with mud and debris.

Shimano's Deore XT Rear Derailleur uses cold-forged construction and cutting edge technology to deliver crisp shifting, real-world reliability, and trademark precision. Plus-type derailleurs use a lever-actuated clutch spring to prevent chain slap, reduce noise while on the trail, and improve chain engagement when riding over rough terrain. Sealed pulley bearings keep things spinning smoothly, and wide plate construction prevents the derailleur from getting clogged with mud and debris.

The Box Four Rear Derailleur is the base of Prime 9 Technology that offers an affordable clutch based 1 by 8-speed derailleur that is simple and light; this makes it a perfect candidate for every entry-level bike that traditionally has a 3 by drive-train that is neither durable nor user friendly.

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 Apex Rear Derailleur features cold-forged aluminum construction for sweet shifting, dependability and low weight. Designed for SRAM's 10-speed road drivetrains and featuring their Exact Actuation Technology, Apex will provide you with perfect shifting every time.

The Shimano Deore XT RD-M8100/M8120 rear derailleur is designed to provide smooth and stable shifting for 2 x 12-speed MTB drivetrains. - Offers fast and shockless shifting - The low-profile design includes a bumper added to the derailleur pulley cage - Shimano Shadow RD+ technology reduces chain slap and creates a quieter drivetrain - Includes large, 13T pulley - Long cage is designed to be used with 2 x 12 drivetrain systems - Rear Derailleur Mount Type: Shimano Rear Direct Mount - Drivetrain Speeds: 12 - Cage Length: Long - Chain Wrap Capacity (teeth): 45 teeth - Largest Cog: 45 - Weight: 284 g - Rear Der/Shifter Compatibility: Shimano Mountain

With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner. - Adjustable chain stabilizer prevents chain slapping and drops - Switch stabilizer ON/OFF to match the terrain - Gravel-tuned clutch tension - Maximum front T difference: 16T - Silent and uninterrupted rear shifting on rough terrain - Low cog: Max. 36T/Min. 30T - High cog: Max. 11T/Min. 11T - Total capacity: 41T - Smooth and reliable mixed-surface shifting - Compatible with current 10s road DUAL CONTROL LEVER - Compatible with wide-range front gearing

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 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 chain pulley 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 at a svelte 178 grams.

Shimano's 105 Rear Derailleur delivers high-end function with upscale looks. With a body of light, durable cold-forged aluminum in Shimano's wide-pivot design with their light-action spring, rear shifting is practically effortless and always super smooth. The top pulley stays a uniform distance from each cassette cog ensuring that every shift resonates with the plunk of exact gear engagement.

SRAM's X9 Rear Derailleur is favored by everyone from weekend rippers to marathon riders crossing the Alps. It offers a great balance of durability, low weight and slick shifting. To achieve that, the X9 features an aluminum/composite construction, SRAM's 1:1 actuation ratio and direct cable routing for quick, reliable shifts. Plus, this beauty is built to last so you can sample singletrack for years to come.

Find new ways to enjoy trekking and daily flat-handlebar riding with this reliable rear Shimano CUES RD-U6020 Shadow derailleur's seamless shifting and pedaling. Its low-profile design and chain stabilization give riders the confidence to choose rougher routes. Plus, e-bikers will benefit from reliable, long-lasting performance thanks to its eBike rated design. - Stable drivetrain performance on trails, gravel, and city streets - Shadow low-profile design protects rear derailleur from obstacles in a wide variety of riding scenes - Designed and tested to provide enduring e-biking performance - 11t upper and 13t lower pulley wheels - Compatible with LINKGLIDE AND HG 11-speed chains

- 1x11-speed SHIMANO SHADOW RD+ rear derailleur - MTB: Direct attachment (Shadow+) - 11T Min top Sprocket - 51T Max Low Sprocket - Stable drivetrain on the trail - Low-profile design avoids damage from rocks - Chain stabilizer reduces chain drop, slap and noise - Silent drivetrain in all gear positions - Decreased rear derailleur and chain tension in low gear - Bigger 13T pulley

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 Tiagra Rear Derailleur GS (10-speed) is sleek, balanced and consistent. The Tiagra 4700 series provides serious entry-level riding performance with trickle-down technology from the top shelf Dura Ace line. - Model Number: RD-4700-GS - Series: Tiagra - Cassette Compatibility: 10 - Maximum Sprocket: low sprocket: 34T / top sprocket: 12T (front double) / 20T low sprocket: 32T / top sprocket: 12T (front triple) - Minimum Sprocket: low sprocket: 28T / top sprocket: 11T (front double) / 20T low sprocket: 25T / top sprocket: 11T (front triple) - Maximum Front Difference: 16T (front double) / 20T (front triple) - Total Capacity: 39T (front double) / 41T (front triple)

With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience while delivering shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features an ON/OFF switch for the chain stabilizer. The RD-RX810 rear derailleur is compatible with road cassettes with a max cog size of 34T. - Adjustable, gravel-tuned chain stabilizer prevents chain slapping and drops - Switch stabilizer ON/OFF to match the terrain - Silent and uninterrupted rear shifting on rough terrain - Low cog: Max. 34T/Min. 30T - High cog: Max. 11T/Min. 11T - Total capacity: 40T - Compatible with current road Dual Control Lever - Maximum front chainring range: 17T

The SLX M7100 series of derailleurs deliver advanced shifting performance with decreased tension in the low gear position and an added bumper on the pulley cage. Larger 13T pulleys increase efficiency and chain management while compatibility with Shimano's new 12-speed cassettes boosts range. - Advanced shifting performance provides the confidence to enjoy any trail - Fast and shockless shifting - Hyperglide+ - Extra wide range 12-speed drivetrain -10-51T (12-speed) - Silent drivetrain in all gear positions - Decreased rear derailleur and chain tension in low gear - New bumper added to rear derailleur pulley cage - Bump Stopper - Bigger 13T pulley - Stable drivetrain on rough terrain - Low-profile design - Shimano Shadow RD+

With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience with shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain stabilizer. The RD-RX812 rear derailleur is compatible with MTB cassettes with a max cog size of 42T. - Adjustable, gravel-tuned chain stabilizer prevents chain slapping and drops - Switch stabilizer ON/OFF to match the terrain - Silent and uninterrupted rear shifting on rough terrain - Smooth and reliable mixed-surface shifting - Compatible with current road Dual Control Levers - High cog: Max. 11T/Min. 11T - Low cog: Max. 42T/Min. 40T - Total capacity: 31T

Shimano 105 7000-series components offer much of the same technology and functionality as their top-level 11-speed drivetrains at a more budget-friendly price point. The RD-R7000 rear derailleur provides stable shifting performance and wide-range compatibility in two different cage lengths. The Shadow RD design limits the amount the derailleur sticks out from the side of the bike, reducing the risk of it making contact with objects and bending. - Maximum cog size: 30t (SS) / 34t (GS) - Total capacity: 35t (SS) / 39t (GS) - Pulleys: 11t - Chain compatibility: HG-EV 11-speed/HG-X11 - Direct mount compatible

Incredibly fast, astonishingly quiet, and impressively precise—fly through all 11 gears with SRAM's Rival 22 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 chain pulley cage for lightning-fast, ultra-precise shifts, and an elastomer coating applied to the jockey wheels makes for extra quiet operation. Aluminum inner and outer cages, aluminum links, and stainless steel hardware keep the durable Rival 22 at a svelte 180 grams.

Designed with the rider in mind, the ADVENT rear derailleur packs trail-ready features into an attainable wide-range drivetrain system. The derailleur kinematics are precisely tuned to use a more direct cable path, making the shifting feel consistent across the lowest and highest gears, and everything in between. - Clutch provides stronger chain management over rough terrain - Ratchet-and-pawl clutch is easily adjustable and repairable - Direct cable routing for smooth, responsive shifting - Compatible with 11-42T 9-speed cassettes - Compatible with ADVENT shifters only

Shimano's 105 Rear Derailleur delivers high-end function with upscale looks. With a body of light, durable cold-forged aluminum in Shimano's wide-pivot design with their light-action spring, rear shifting is practically effortless and always super smooth. The top pulley stays a uniform distance from each cassette cog ensuring that every shift resonates with the plunk of exact gear engagement.

Run silent, run deep. Shimano's ZEE rear derailleur uses a short cage and a Shadow profile to keep tucked out of the way of rocks, roots, whatever. The Plus part is a one-way clutch system that stabilizes the cage and your chain when ripping over rough terrain. Chain slap and the noise that goes with it, as well as dropped chains, are virtually eliminated. Of course, it still has the smooth action and sniper-like shifting that Shimano is rightly famous for. Freeriders and trail riders can run a typical MTB cassette like an 11-32, 11-34, or 11-36. And DHers can choose the close-ratio version and run a road cassette like 11-23, 11-25 or 11-28.

SRAM's XX1 Ceramic Bearing Rear Derailleur Pulleys run on super-smooth, efficient ceramic bearings so your drivetrain rolls with ease. They are lighter than conventional pulleys and even come with SRAM's ceramic-bearing grease in an easy-to-use 10ml syringe.

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.

The SRAM Rival 1 rear derailleur is engineered for smooth, reliable shifting action, delivering 100% of what you demand. By eliminating unwanted chain movement, X-HORIZON shifts faster, reducing shift effort and chain slap. - X-HORIZON design reduces shift force while eliminating ghost shifting and chain slap - Large upper pulley offset automatically adjusts chain gap - Sealed cartridge bearings and aluminum cage - Technologies: X-HORIZON, EXACT ACTUATION, X-SYNC, ROLLER BEARING CLUTCH, Cage Lock - Medium cage: 11-26 through 11-36 cassettes, 269g - Long cage: 10-42 cassette, 275 g

Incredibly fast, astonishingly quiet and impressively precise—fly through all 11 gears with SRAM's Rival 22 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 chain pulley cage for lightning-fast, ultra-precise shifts, and an elastomer coating applied to the jockey wheels makes for extra quiet operation. Aluminum inner and outer cages, aluminum links, and stainless steel hardware keep the durable Rival 22 at a svelte 191 grams. Plus, SRAM's WiFLi technology delivers a wider range of gears than your standard triple, faster shifts through two chainrings and every gear on the rear cassette, all with significant weight savings.

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

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

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