SRAM GX Eagle 12 Sp Rear DerailleurBringing you the versatility, toughness and slick shifting you need for dominating your local trails, the GX Eagle rear mechanism brings 12-Speed compatibility to your mountain bike (MTB) at a more wallet-friendly price point. Built to handle the roughest trails, SRAM has added steel bearings into the pulley wheels for a smooth performance that lasts. Plus, its long cage design means it works with 10-50 and 10-52 tooth cassettes, giving you the range to ride efficiently in any situation. SRAM has also updated the design of the cage to give you increased chain retention and faster shifts as you blast your way through the forest.Finished with the GX Eagle™ master colourway, it compliments any cassette and chain colourway a rider wants from the Eagle™ Colour system. Further proof that the GX Eagle™ derailleur is there for one thing - to do the job.Features:Material: Cage: Aluminium; Pulley Bearings: SteelSpeed: 12-SpeedUse: All-Mountain (AM), Cross Country (XC) and EnduroMount: Standard hanger mountCage Type: LongMax Tooth: 52TCable Pull Ratio: X-ActuationClutch Type: YesBackwards compatible, works with both 10-50T and 10-52T cassettesUpdated cage architecture provides better chain retention and precise shiftsPart of Eagle™ Colour system and goes with all colours of Eagle cassettes & chainsManufacturer's Part Number: RD-GX-1-B2Weight: 680gBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM XX1 Eagle 12 Sp Rear DerailleurWhether you're competing in a cross-country event or shredding the MTB trails for leisure, this rear mech is engineered for fast and smooth operation. It features a carbon outer cage and a tough aluminium inner cage, which allows you to enjoy its fantastic durability, without sacrificing any weight. SRAM has also equipped this model with updated cage geometry that offers superior chain retention as well as crisper shifting. Another highlight is its backwards compatibility with 10-50T and more recent 10-52T cassettes.- Updated cage geometry provides better chain retention and crisper shifting- Comes in XX1 Eagle master colourway as part of Eagle Colour system - to go with all cassette and chain colour options- Backwards compatible, works with 10-50T and new 10-52T cassettesFeatures: Material: Outer Cage: Carbon; Inner Cage: Aluminium Use: MTB, Cross-Country Speed: 12 speed Type: Rear derailleur Max Tooth: 52T Mount: Standard Cable Pull Ratio: X-Actuation Single or Pair: SinglePart Number: RD8139000Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM X01 Eagle 12 Sp Rear DerailleurThis rear MTB derailleur features a rock-solid aluminium inner and outer construction, which makes it ideal at handling all the abuse that's associated with all-day epics in the mountains. SRAM has also equipped this top-tier Eagle series model with some of their finest technology, so you can benefit from faster and smoother shifting performance on your mountain bike. One final highlight is its updated cage design that provides superior chain retention and more precise shifts as you weave between the trails at speed.- Updated cage provides better chain retention and more precise shifts- Comes in X01 Eagle master colourway as part of Eagle Coloursystem - to go with all cassette and chain colour options- Backwards compatible, works with 10-50t and new 10-52t cassettesElevating the shift, expanding the capable, the X01 Eagle derailleur features an updated cage architecture, to provide better chain management than ever. The X01 Eagle rear derailleur works with the new 10-52t cassettes and is backwards compatible to also work with 10-50t options. As part of the new Eagle Coloursystem, it comes in X01 Eagle master colourway to go perfectly with any colour cassette and chain a rider wants.Features: Material: Aluminium Use: MTB Speed: 12 speed Mount: Standard Cable Pull Ratio: X-Actuation Max Tooth: 52 Type: Rear derailleur Part Number: Red: RD8138000; Lunar: RD8138001Technologies: X-Actuation: Developed specifically for SRAM 1x, X-ACTUATION keeps shifting sharp and consistent across the entire cassette. Eagle: Eagle technology represents our newest 1x drivetrain technology. Eagle is a lighter, simpler, more durable, and easier to use drivetrain. Eagle features all-new 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 500%, while is equal to 2x11 drivetrains. Cage Lock: With Cage Lock technology in the rear derailleur, wheel removal and installation - as well as chain installation - becomes faster and simpler. Just push the cage forward to create slack and lock it into place.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM X01 Eagle 12 Sp Rear DerailleurThis rear MTB derailleur features a rock-solid aluminium inner and outer construction, which makes it ideal at handling all the abuse that's associated with all-day epics in the mountains. SRAM has also equipped this top-tier Eagle series model with some of their finest technology, so you can benefit from faster and smoother shifting performance on your mountain bike. One final highlight is its updated cage design that provides superior chain retention and more precise shifts as you weave between the trails at speed.- Updated cage provides better chain retention and more precise shifts- Comes in X01 Eagle master colourway as part of Eagle Coloursystem - to go with all cassette and chain colour options- Backwards compatible, works with 10-50t and new 10-52t cassettesElevating the shift, expanding the capable, the X01 Eagle derailleur features an updated cage architecture, to provide better chain management than ever. The X01 Eagle rear derailleur works with the new 10-52t cassettes and is backwards compatible to also work with 10-50t options. As part of the new Eagle Coloursystem, it comes in X01 Eagle master colourway to go perfectly with any colour cassette and chain a rider wants.Features: Material: Aluminium Use: MTB Speed: 12 speed Mount: Standard Cable Pull Ratio: X-Actuation Max Tooth: 52 Type: Rear derailleur Part Number: Red: RD8138000; Lunar: RD8138001Technologies: X-Actuation: Developed specifically for SRAM 1x, X-ACTUATION keeps shifting sharp and consistent across the entire cassette. Eagle: Eagle technology represents our newest 1x drivetrain technology. Eagle is a lighter, simpler, more durable, and easier to use drivetrain. Eagle features all-new 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 500%, while is equal to 2x11 drivetrains. Cage Lock: With Cage Lock technology in the rear derailleur, wheel removal and installation - as well as chain installation - becomes faster and simpler. Just push the cage forward to create slack and lock it into place.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM X01 Eagle AXS 12 Speed Rear DerailleurThis off-road rear mech can be used for MTB or enduro riding as it features a hard-wearing forged aluminium and stainless-steel construction, that's more than capable of handling all the abuse that's associated with long days on the trails. SRAM has packed this model with its finest technologies such as Overload Clutch protection, where in the event of an impact, the motor gearbox disengages, giving the derailleur freedom to move, and instantly returns back to its position for a seamless experience for the rider.SRAM has also equipped this trail-ready rear mech with its renowned AXS technology. AXS lets you connect your AXS-enabled components to a mobile app, where you can assign custom actions to your controls. Everything speaks the same language, and you can even combine road and mountain bike parts to build the bike of your dreams.Part of the top-level Eagle series, this MTB rear derailleur is a lighter, simpler, more durable, and easier to use model. Eagle features 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 500%, while is equal to 2x11 drivetrains. - Eagle technology - Overload Clutch protection - AXS enabled componentry software that makes it possible to both program and personalise SRAM and RockShox components - System is completely water and dust proof to IP69K- Battery sold separatelyIt's a MTB derailleur that's specifically designed and optimized to be motor-driven instead of cable-actuated. AXS powered components enable customization and scale to an individual rider's liking via the AXS App. It features a shorter cage for 10mm more ground clearance, with more chain wrap on the cassette to sit slightly further forward, and further inboard from mechanical Eagle. The Eagle AXS derailleur is smart enough to protect itself thanks to its incredibly resilient Overload Clutch. In the event of an impact, the motor gearbox disengages, giving the derailleur freedom to move, and instantly returns back to its position for a seamless experience for the rider. The system is tested to IP69K water and dust proofing standard for creek crossings, mud splatterings and the resulting post-ride pressure washings. Features: Material: Cage: Forged Aluminum; Pulley Bearings: Steel; Hardware: Stainless Steel Use: MTB, Enduro Speed: 12 speed Max Tooth: 52 Mount: Standard Single or Pair: Single Type: Rear derailleur Part Numbers: Lunar: RD8126001; Red: RD8126002Technologies: AXS: When SRAM launched the original RED eTap in 2015, one of its most exciting features was that it was wireless. Now, we've taken eTap wireless to the next level with AXS. AXS is SRAM's bike component integration system that connects electronic bicycle components and software. AXS lets you connect your AXS-enabled components to a mobile app, where you can assign custom actions to your controls. Everything speaks the same language, and you can even combine road and mountain bike parts to build the party bike of your dreams. Wireless controls open the door to new levels of customization. With AXS, you can personalize your component behavior to match your riding style and preferences. Turn on enhanced shifting modes, or reassign shifting actions. The AXP Mobile App and AXS Web allow you to monitor your bike's performance and readiness. It's an easy way to keep tabs on your battery levels—including the CR2032 batteries in eTap shift levers—and keep AXS component firmware up-to-date. AXS Web analyzes your ride files specific to shifting, gear use, power zones, and tyre pressure, so that you can quickly and easily learn more about how your bike is working for you and consider adjustments. Cage Lock: With Cage Lock technology in the rear derailleur, wheel removal and installation - as well as chain installation - becomes faster and simpler. Just push the cage forward to create slack and lock it into place. Overload Clutch Protection: The Eagle AXS derailleur is smart enough to protect itself thanks to its incredibly resilient Overload Clutch. In the event of an impact, the motor gearbox disengages, giving the derailleur freedom to move, and instantly returns back to its position for a seamless experience for the rider. The primary purpose of the Overload Clutch is to protect the derailleur shift motor, but it serves to protect your derailleur and derailleur hanger from damage as a by-product. A very helpful by-product. Horizon: This rear derailleur's "straight parallelogram" design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain hap across all gears. X-Sync: SRAM X-Sync 1X chain rings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chain rings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1X drivetrain. Eagle: Eagle technology represents our newest 1x drivetrain technology. Eagle is a lighter, simpler, more durable, and easier to use drivetrain. Eagle features all-new 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 500%, while is equal to 2x11 drivetrains. Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Universal Derailleur HangerIf you’ve ever snapped a gear hanger in the woods you know how infuriating it can be, so SRAM brings you its pivoting Universal Derailleur Hanger (UDH), which is compatible with a wide range of bike frames and all major drivetrain brands. The pivoting design of this rear mechanism hanger rotates slightly in the event of a sudden impact, protecting your expensive shifting component. It then enables you to position your chain on to your smallest cog so you can get rolling again in no time.Features: Material: Aluminium Compatibility: Many frame brands/models and SRAM, Shimano, Box and Sunrace rear derailleurs Use: Mountain Bike (MTB), electric mountain bike (E-MTB) Protects against chain jams Improves shifting performance Guarantees better alignment Consolidates thousands of mountain bike derailleur standards Offers unparalleled derailleur protection and perfect alignment Rotates rearward on impact and features the ability to “re-rail” the chain back onto the small cog Part Number: AC-DRHG-MTB-A1Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM XX1 Eagle AXS 12sp Rear DerailleurFeaturing a strong carbon cage construction and steel pulley bearings, this high-quality mountain bike (MTB) rear derailleur is designed to handle the demands that are associated with modern cross country (XC) and mountain bike (MTB) trail-riding. Thanks to its wireless AXS enabled technology, riders also will benefit from easy personalisation and control wherever their ride takes them. Coming equipped with SRAM's finest technologies including Cage Lock, Overload Clutch Protection, X-Horizon and X-SYNC, this is a great choice of upgrade for riders who want the highest level of performance and durability.Rear Derailleur with AXS Wireless ConnectivityMore than a mechanical derailleur with a battery and a motor bolted on, the Eagle AXS derailleur is the heart of the whole AXS system. It features a shorter cage for 10mm more ground clearance, with more chain wrap on the cassette to sit slightly further forward, and further inboard from mechanical Eagle. Instantaneous shifts from a single touch even while under World Cup-winning chain loads recorded in the heat of racing and affirmed in the test lab. Tested to IP69K water and dust proofing standard, so whatever race day brings, you’re ready.Features: Cage Material: Carbon Hardware Material: Titanium Pulley Bearing Material: Steel Use: XC, MTB Speed: 12 speed Max Tooth: 52T Battery Included: No, available separately XC focus and trail-ready Rainbow colourway Eagle technology Overload Clutch protection System is completely water and dust proof to IPX7 AXS enabled componentry software that makes it possible to both program and personalise new SRAM and RockShox componentsTechnologies: Cage Lock: With Cage Lock technology in the rear derailleur, wheel removal and installation as well as chain installation becomes faster and simpler. Just push the cage forward to create slack and lock it into place. Roller Bearing Clutch: Roller Bearing Clutch technology eliminates derailleur bounce and chain slap without sacrificing precision. X-Horizon: This rear derailleur’s “straight parallelogram” design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain gap across all gears. X-SYNC: SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation. Chainrings sold separately. Eagle: Eagle technology represents SRAM's updated 1x drivetrain technology. Eagle is a lighter, simpler, more durable, and easier to use drivetrain. Eagle features revised 1x components, engineered for even greater durability and performance while maintaining a significant weight advantage over other drivetrain solutions. Eagle technology also provides an expanded gear range of 520%, which is equal to 2x11 drivetrains. AXS: AXS is SRAM’s bike component integration system that connects electronic bicycle components and software. The SRAM AXS app allows riders to see battery status, change component behaviour, personalise controls, get maintenance reminders, and update firmware.Manufacturer's Part Number: 00.7518.125.000Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM RED eTap AXS 12sp Rear Derailleur Exploring new limits has never been easier with this AXS enabled rear derailleur that's specifically developed for the demands of modern road cycling. It features a high-quality carbon cage material for fantastic strength and durability, without adding any unnecessary weight to your bike. Thanks to its AXS wireless technology, it offers easy personalisation, while its advanced chain management keeps it silence and secure no matter the terrain. Another highlight is it comes with faster pulleys, bearings, motors and signals to improve speed in every way and ensure you're always in the right gear.AXS Enabled Rear DerailleurControl. Personalize. Monitor. AXS is SRAM’s bike component integration system that takes eTap wireless shifting to the next level. The SRAM AXS app allows riders to see battery status, change component behaviour, personalise controls, get maintenance reminders, and update firmware.Super Smooth Orbit TechnologyOn tarmac or gravel, 1x or 2x, eTap AXS gives a quiet, secure, and smooth ride. Thanks to the ultra-lightweight Orbit fluid damper, you’ll ride more confidently and efficiently than ever, no matter the terrain.X-Range Modern GearingRoad bikes are faster and more capable than ever before, and riders are expanding what’s possible with drop bar bikes. X-Range offers wider range, more useful and smoother gear progression, as well as smarter shift settings, enabled by AXS.Features: Cage Material: Carbon Pulley Bearings Material: Ceramic Use: Road Speed: 12 speed Cage Size: Short Cage Max Tooth: 33T Battery Included: No, available separatelyTechnologies: X-SYNC: SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation. eTap: All of the underlying tech in our new SRAM RED eTap groupset, such as wireless shifting, advanced battery power management, and mechatronics technologies, are meant to serve one ultimate purpose: to facilitate the most intuitive and consistent shifting available. This shift logic is called eTap. Right lever makes it harder, left lever makes it easier, both levers shift the front derailleur. Simple, unmistakable, and intuitive. Orbit: Orbit technology is an innovative new form of derailleur motion control. It utilizes silicon fluid as part of an elegant and ultra-lightweight damper system. Compared to a standard friction clutch system, Orbit technology places no additional resistance on the rear derailleur’s spring when under slow or light movement. This means easier shifting and rear wheel removal. And while riding, the fluid damper reduces chain bounce. It’s rock-solid reliability for both 1x and 2x systems. AXS: AXS is SRAM’s new bike component integration system that connects electronic bicycle components and software. The SRAM AXS app allows riders to see battery status, change component behavior, personalize controls, get maintenance reminders, and update firmware. X-Range: Road bikes are faster and more capable than ever before, and riders are expanding what’s possible with drop bar bikes. X-Range is gearing for today’s road riding. We completely reimagined road gearing for wider range, more useful and smoother gear progression, as well as smarter shift settings—enabled by AXS. With X-Range, you’re always in the right gear.Manufacturer's Part Number: 00.7518.120.000Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Red 22 11 Speed Road Front DerailleurThis stunning front mech is specially developed for road cyclists who want to gain the edge over their competitors as it offers fast and consistent shifting performance. This top-quality model features the renowned Yaw technology where its derailleur cage actually rotates instead of moving back and forth, producing an accurate angular relationship with your chain. As a result, you'll benefit from unmatched shifting making this the ultimate choice of a replacement for your old or worn-out existing derailleur.Features: Material: Outer Cage: Aluminium; Inner Cage: Steel Mount: Braze-on Speed: 2x11 speed Use: Road Compatibility: SRAM RED 22/Force 22 front-shift brake levers/X-GlideR Chainrings; SRAM R2C Aero SL-1190/SRAM R2C Aero SL-1150 shifters; SRAM 900/SRAM 500 Aero brake levers Slim spring design eliminates frame interference Optimised for shifting with X-GlideR chainrings Precision install markings Integrated chain spotter protects your frame without adding any extra clunk and adjusts independently of the derailleur itself Weight: 69gTechnologies: Yaw: With a front derailleur cage that rotates to maintain a consistent angular relationship with the chain, Yaw technology eliminates the need for shifter trim. As a result, shifts feel more direct and precise, delivering an unmatched performance advantage in front shifting.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM NX Eagle 12 Speed Rear DerailleurThe NX Eagle 12-Speed Rear Mech provides the same shifting performance as the top of the range XX1 and X01 equivalents from SRAM, but at a more affordable price. Featuring SRAM’s 1x specific X-Horizon cage design, which ensures capacity and shifting accuracy for the huge 11-50T cassette range while complimenting the smooth shifting performance of the Eagle 12-Speed drivetrain transmission. This mech also features the SRAM Type-3 Roller Bearing Clutch to provide industry-leading durability, quiet performance and unmatched shifting stability. Gap Adjustment Gauge not included.Cage Lock: With Cage Lock technology in the rear derailleur, wheel removal and installation, as well as chain installation, becomes faster and simpler. Just push the cage forward to create slack and lock it into placeRoller Bearing Clutch: The Roller Bearing Clutch delivers maximum drivetrain stability even through the most punishing terrain. This stability benefits the drivetrain dramatically, as derailleur bounce and chain slap are eliminated without sacrificing precision.Features: Material: Aluminium (cage), Steel (spring, pulley), Stainless Steel (hardware) Max Tooth: 50T Compatibility: All 12-Speed Eagle drivetrains Gap Adjustment Gauge not included Weight: 339g Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Rival 1 11 Speed Rear DerailleurThe SRAM Rival 1 Rear Mech delivers incredibly smooth, quiet and reliable shifting even in the most demanding conditions. It takes the proven technologies of SRAM's 1x mountain bike derailleur design and applies them to provide exceptional off-road performance for cyclocross use.Quiet and Smooth Shifting PerformanceThe internal clutch design eliminates chain slack, making it almost impossible for the chain to fall of the chainring whilst cycling; a real benefit when riding on rough terrain. It also creates a noticeably smoother, quieter and higher performing drivetrain configuration for your bike.Features: Cage Material: Aluminium Pulley Bearings: Steel sealed cartridge bearings Pulley Wheel Size: 12T Speed: 11-Speed Cable Pull Ratio: Exact Actuation Maximum Sprocket Size: Medium Cage: 36T; Long Cage: 42T Weight: Medium Cage: 432g; Long Cage: 438gTechnologies: Cage Lock: Wheel removal and installation, as well as chain installation, becomes faster and simpler. Just push the cage forward to create slack and lock it into place. X-Sync: The X-Sync pulley features a 12-tooth design that helps control the chain’s lateral movement Roller Bearing Clutch: Maximum drivetrain stability even through the most punishing terrain. With Roller Bearing Clutch technology, derailleur bounce and chain slap are eliminated without sacrificing precision. Exact Actuation: Simplified and stabilised shifting over tight cog spacing found on modern cassettes. By using exact cable tension, the end result is the easiest index shifting system to set up and it stays that way. X-Horizon: The ‘straight parallelogram’ design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain gap across all gears.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Rival 1 11 Speed Rear DerailleurThe SRAM Rival 1 Rear Mech delivers incredibly smooth, quiet and reliable shifting even in the most demanding conditions. It takes the proven technologies of SRAM's 1x mountain bike derailleur design and applies them to provide exceptional off-road performance for cyclocross use.Quiet and Smooth Shifting PerformanceThe internal clutch design eliminates chain slack, making it almost impossible for the chain to fall of the chainring whilst cycling; a real benefit when riding on rough terrain. It also creates a noticeably smoother, quieter and higher performing drivetrain configuration for your bike.Features: Cage Material: Aluminium Pulley Bearings: Steel sealed cartridge bearings Pulley Wheel Size: 12T Speed: 11-Speed Cable Pull Ratio: Exact Actuation Maximum Sprocket Size: Medium Cage: 36T; Long Cage: 42T Weight: Medium Cage: 432g; Long Cage: 438gTechnologies: Cage Lock: Wheel removal and installation, as well as chain installation, becomes faster and simpler. Just push the cage forward to create slack and lock it into place. X-Sync: The X-Sync pulley features a 12-tooth design that helps control the chain’s lateral movement Roller Bearing Clutch: Maximum drivetrain stability even through the most punishing terrain. With Roller Bearing Clutch technology, derailleur bounce and chain slap are eliminated without sacrificing precision. Exact Actuation: Simplified and stabilised shifting over tight cog spacing found on modern cassettes. By using exact cable tension, the end result is the easiest index shifting system to set up and it stays that way. X-Horizon: The ‘straight parallelogram’ design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain gap across all gears.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.