SRAM Rival eTap AXS 12 Speed Rear DerailleurBenefitting from wireless electronic eTap shift logic, this 12 speed rear derailleur provides intuitive shifting, easy setup and reliability on your road bike. SRAM has also equipped this model with a rock-solid aluminium cage with steel pulley bearings, so you'll benefit from the best balance of strength, durability and performance on every mile of road. SRAM AXS Enabled Road Bike Rear DerailleurThis rear derailleur is low on complexity, but rich with features. SRAM has equipped it with its renowned AXS wireless technology, which allows for easy personalisation and control on your road bike. Thanks to its eTap shift logic, it delivers intuitive shifting, easy setup and reliability that has been proven at the highest levels. AXS technology means personalisation is in your hands.The precision and reliability of 12-speed eTap AXS, now at a whole new level. On any surface you can imagine, in any drivetrain configuration, the Rival eTap AXS rear derailleur will handle it. Secure chain management and fast, precise shifting make for a smooth and quiet ride, every time.- Wireless electronic eTap shift logic for intuitive shifting, easy setup and reliability- Compatible with both 1x and 2x drivetrains- 36t cog max derailleur works with 10-28, 10-30, 10-33, and 10-36 cassettes- SRAM AXS enabled, allowing easy personalisation- Chain management keeps the drivetrain quiet and secure- X-SYNC pulleys for increased durability and efficiencyFeatures: Cage Material: Aluminium Pulley Bearings Material: Steel Use: Road Speed: 12 speed Cage: Medium cage Max Tooth: 36 Battery Included: Not included, battery available separatelyTechnologies: AXS Enabled: AXS is SRAM's bike component integration system that connects electronic bicycle components and software. Control: 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. Personalise: Wireless controls open the door to new levels of customisation. With AXS, you can personalise your component behavior to match your riding style and preferences. Turn on enhanced shifting modes, or reassign shifting actions. Measure: 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 analyses 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.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Rival eTap AXS 2x12 Front DerailleurDelivering crisp, accurate front shifting operation, this front derailleur benefits from wireless electronic eTap shift logic for a more rider-tuned experience on your road bike. Thanks to its eTap shift logic, it delivers intuitive shifting, easy setup and reliability that has been proven at the highest levels. Low on complexity, but rich with features, it's equipped with SRAM's renowned AXS wireless technology that allows for easy personalisation and control. AXS technology means personalisation is in your hands.X-Range Optimised and Yaw TechnologyDue to today's drop bar bikes being faster and more capable than ever before, riders want a shifting set-up with wide-range gearing to match their wide range of cycling pursuits. But, as the range is only half of the equation, they also want a drivetrain that offers the right gear for any situation. This front derailleur is optimised for use with X-Range chainrings, so riders can enjoy fewer, faster front shifts, which makes it easier for you to find the right gear and offers a distinct performance advantage in comparison to traditional drivetrains.SRAM has also equipped this model with Yaw technology, where the front derailleur cage rotates to maintain a consistent angular relationship with your chain while eliminating the need for shifter trim. As a result, shifts feel more direct and precise, delivering an unmatched performance advantage in front shifting.SRAM AXS Enabled Road Bike Front DerailleurThe precision and reliability of eTap AXS, now at a whole new level. The Rival eTap AXS front derailleur is optimised for X-Range chainrings and uses Yaw technology so there's no need for trim. Never miss a shift.- Wireless electronic eTap shift logic for intuitive shifting, easy setup and reliability- AXS enabled for easy personalisation- Crisp and accurate front shifts- SRAM Yaw trimless cage technology optimised for use with 46/33 or 48/35 X-Range chainrings- Designed for standard chainline eTap AXS cranksPlease note: A battery and charger are available to purchase separately for this product.Features: Use: Road Speed: 2x12 speed Compatible Chainring: Road-Yaw Mount Type: Braze-on Cable Routing: Wireless Chainstay Angle: 61-66 degrees Not Included: Battery and charger are available to purchase separatelyTechnologies: AXS Enabled: AXS is SRAM's bike component integration system that connects electronic bicycle components and software. Control: 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. Personalise: Wireless controls open the door to new levels of customisation. With AXS, you can personalise your component behavior to match your riding style and preferences. Turn on enhanced shifting modes, or reassign shifting actions. Measure: 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 analyses 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. 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 Eagle AXS Rear Derailleur Battery CoverKeeping your SRAM AXS rear derailleur safe on demanding mountain bike (MTB) rides, the SRAM Eagle AXS Rear Derailleur Battery Cover provides secure protection wherever your next adventure takes you. It features a lightweight cowling that's specifically designed to protect your battery while installed on your SRAM AXS rear derailleur. The AXS Battery Cover fits all AXS mountain bike derailleurs.Features: Use: MTB Speed: 12 speed Compatibility: Battery Protector for Eagle AXS Rear Derailleurs Genuine SRAM spare partBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM GX Eagle AXS 12 Speed Rear DerailleurThis 12 speed mountain bike (MTB) rear derailleur is part of SRAM's high-performance AXS ecosystem, which offers faster, more consistent operation, and lets you shift when you want, even under load, without having to plan around the terrain. It also features a tough steel construction, which makes it more than ready to tackle whatever the mountain terrain has to offer. Wireless Electronic ShiftingDeveloped for use with the GX Eagle AXS range, this model boasts many of the features that you would expect from the Eagle ecosystem such as 520% range, mix and match compatibility and the ability to customise your set-up using the SRAM AXS app. Its AXS enabled componentry software and AXS mobile app also allows for personalisation of the component controls and to serve as a single access point for all SRAM AXS connected products. Thanks to its wireless electronic shifting technology with engineered hardware, riders will benefit from a new ergonomic experience that's based on touching a button rather than pushing a lever.MTB Rear Derailleur with Overload Clutch ProtectionRiders 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 SRAM 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 SRAM's updated expanded range 10-52t cassette as well as its 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.- AXS enabled componentry software that makes it possible to both program and personalise new SRAM and RockShox components Eagle technology.- Overload Clutch protection.- Finished with the GX Eagle master colourway.- Battery sold separately.Features: Cage Material: Steel Pulley Bearings Material: Steel Use: MTB Speed: 12 speed Max Tooth: 52 Battery Included: No, available separately Manufacturer's Part Number: 00.7518.151.000Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Force eTap AXS 12 Speed Rear DerailleurFeaturing a tough aluminium cage construction and steel pulley bearings, this versatile rear derailleur is built to withstand the challenges that are associated with road and gravel riding. SRAM has also ensured that this model is AXS enabled, so riders can benefit from easy personalisation and control wherever their journey takes them. Another highlight is its Orbit chain management technology that's specifically designed to keep your drivetrain quiet and secure when travelling on rough roads and gravel. This makes it a great choice of upgrade for riders who want to explore further when the tarmac comes to an end.SRAM AXS Enabled Road Bike Rear DerailleurFast, precise rear shifting is now more attainable than ever. Whether you ride 2x or 1x, tarmac or gravel, the SRAM Force eTap AXS rear derailleur is up for the task. It features Orbit damper technology for quiet, secure chain management over rough roads and capitalizes on larger X-SYNC pulleys for improved durability and efficiency.- Orbit chain management technology keeps the drivetrain quiet and secure- Compatible with both 1x and 2x drivetrains- SRAM AXS enabled, allowing easy personalisation- 36t-max derailleur option is compatible with 10-36, 10-33, and 10-28 cassettes- 33t-max derailleur option is compatible with 10-26, 10-28, and 10-33 cassettes- Larger X-SYNC pulleys for increased durability and efficiency- Compatible with existing eTap batteriesFeatures: Cage Material: Aluminium Pulley Bearings Material: Steel Use: Road, Gravel Speed: 12 speed Max Tooth: Multiple options available to selectTechnologies: AXS Enabled: AXS is SRAM's bike component integration system that connects electronic bicycle components and software. Control: 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. Personalise: Wireless controls open the door to new levels of customisation. With AXS, you can personalise your component behavior to match your riding style and preferences. Turn on enhanced shifting modes, or reassign shifting actions. Measure: 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 analyses 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. X-Sync: SRAM X-SYNC 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. Orbit: Orbit technology is an innovative form of derailleur motion control. It utilises 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.Manufacturer's Part Numbers: 00.7518.121.001 Grey Short Cage Max 33t 00.7518.136.000 Grey Medium Cage Max 36tBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Force eTap AXS 12 Speed Rear DerailleurFeaturing a tough aluminium cage construction and steel pulley bearings, this versatile rear derailleur is built to withstand the challenges that are associated with road and gravel riding. SRAM has also ensured that this model is AXS enabled, so riders can benefit from easy personalisation and control wherever their journey takes them. Another highlight is its Orbit chain management technology that's specifically designed to keep your drivetrain quiet and secure when travelling on rough roads and gravel. This makes it a great choice of upgrade for riders who want to explore further when the tarmac comes to an end.SRAM AXS Enabled Road Bike Rear DerailleurFast, precise rear shifting is now more attainable than ever. Whether you ride 2x or 1x, tarmac or gravel, the SRAM Force eTap AXS rear derailleur is up for the task. It features Orbit damper technology for quiet, secure chain management over rough roads and capitalizes on larger X-SYNC pulleys for improved durability and efficiency.- Orbit chain management technology keeps the drivetrain quiet and secure- Compatible with both 1x and 2x drivetrains- SRAM AXS enabled, allowing easy personalisation- 36t-max derailleur option is compatible with 10-36, 10-33, and 10-28 cassettes- 33t-max derailleur option is compatible with 10-26, 10-28, and 10-33 cassettes- Larger X-SYNC pulleys for increased durability and efficiency- Compatible with existing eTap batteriesFeatures: Cage Material: Aluminium Pulley Bearings Material: Steel Use: Road, Gravel Speed: 12 speed Max Tooth: Multiple options available to selectTechnologies: AXS Enabled: AXS is SRAM's bike component integration system that connects electronic bicycle components and software. Control: 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. Personalise: Wireless controls open the door to new levels of customisation. With AXS, you can personalise your component behavior to match your riding style and preferences. Turn on enhanced shifting modes, or reassign shifting actions. Measure: 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 analyses 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. X-Sync: SRAM X-SYNC 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. Orbit: Orbit technology is an innovative form of derailleur motion control. It utilises 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.Manufacturer's Part Numbers: 00.7518.121.001 Grey Short Cage Max 33t 00.7518.136.000 Grey Medium Cage Max 36tBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM RED eTap 11 Speed WiFli Rear DerailleurEnjoy reliable wireless shifting performance with the 11 Speed WiFli Rear Derailleur from SRAM. Designed with a bigger cassette size than their previous model, this component is the ideal choice for cyclocross (CX) or gravel riding. SRAM’s own wireless technology provides a secure connection and the removable battery has a 1000km range. So, if you forget to top up your battery and it runs low miles from home, simply swap it over with the front derailleur's battery to get back on the road with a full cassette range. This rear mech also benefits from the same quality construction of the mechanical SRAM Red version, featuring ceramic pulley bearings, a carbon cage, and an anodised alloy body.Features:Wireless connection via AIREA network for a fast and clean installationSimple clip-on, clip off removable battery (swappable with front derailleur-battery not included)Cage Length/Type: ShortCage Material: CarbonSpeed: 11 SpeedRear Derailleur: SRAM Red eTapPulley Bearings Material: CeramicMaximum Tooth: 33Compatibility: SRAM 11-speed compatible, 32 teeth maximum capacity, designed to work with SRAM PowerGlide and PowerdomeX cassettes, only compatible with SRAM RED eTap shift/brake controlsPart Number: RD-RED-E-A2Please Note: Battery not includedTechnologies:AIREA: Utilising 128-bit encryption, eTap® shift signals are transmitted and received in accordance with SRAM’s proprietary wireless protocol known as AIREA. Each time an eTap groupset is paired, a new encryption code is generated and assigned to the components in this group to ensure complete shifting security.eTap: All of the underlying technology in our new SRAM RED eTap groupsets, 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. The right lever makes it harder, the left lever makes it easier, both levers shift the front derailleur. Simple, unmistakable, and intuitive.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.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.WIFLI: WiFLi = Wider - Faster – Lighter. SRAM's WiFLi technology is based on the compact 2 x 10 or 11 - two front chainrings and 10 or 11 gears in the rear - design inherent in SRAM RED 22, Force 22, Rival 22 and Apex, which delivers a wider range of gears, up to 11-32, than your standard triple, faster shifts through two chainrings and every gear on the rear cassette, and with significant weight savings. WiFLi cassettes are also available for Force CX1.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Force CX1 11 Speed Rear DerailleurThe Force CX1 11 Speed Rear Derailleur from SRAM adopts all the technologies of SRAM 1x mountain bike technology to provide the fastest, quietest and smoothest 1x11 shifting available.SRAM's unique clutch system eliminates chain slack, providing for smoother, quieter, and more secure chain travel. 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. Cage LockWith Cage Lock technology in the rear derailleur, wheel removal and installation, as well as chain installation, becomes faster and simpler. Just pushing the cage forward to create slack and lock it into place. Roller Bearing ClutchRoller Bearing Clutch (RBC) rear derailleurs deliver maximum drivetrain stability—even through the most punishing terrain. With RBC technology, derailleur bounce and chain slap are eliminated without sacrificing precision. Exact Actuation (EA)When SRAM launched their road technology from scratch SRAM re-applied their mountain bike (MTB) proven SRAM 1:1 actuation ratio (shifter cable travel: derailleur movement) for 10 speed rear shifting. EA helps to simplify/stabilise the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension. The result: the easiest index shifting system to set up and it stays that way. X-HorizonThe X-Horizon 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-SyncSRAM 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 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. Features: A dedicated 1x rear derailleur for cyclocross Exact Actuation for fast and accurate shifts using SRAM's 1:1 actuation ratio (shifter cable travel: derailleur movement) 10 and 11 speed compatible X-Sync pulley features a 12-tooth design that helps control the chain's lateral movement X-Horizon "straight parallelogram" design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force Roller Bearing Clutch technology Cage Lock technology Weight: 261gBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM X4 7-8 Speed Rear DerailleurCompatible with both 7 and 8-speed SRAM drivetrains, this X4 rear derailleur benefits from technologies used on SRAM’s more expensive mechanisms to bring you reliable shifting, even over the toughest terrains. One of the few types out there with a high performance level and good value for money, it’s ready for hard rides, on the road or off-road.Features:Speed: 7/8-SpeedCompatibility: SRAM 7/8-Speed flat bar shifters onlyCage Size: Long CageMaximum Cassette Size: 11-34TTotal Capacity: Long 45TTechnologies: Di.R.T: Direct Route TechnologyMounting: Standard hanger mountClutch Type: NoUse: Hybrid, Mountain Bike (MTB)1:1 Actuation RatioLightweight materials selection6061 Alloy B-knuckleSteel cage with replaceable pulleysLow profile designWide pivot design for superior stiffness during shiftsManufacturer's Part Number: RD-X4-A1Weight: 220gBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Force 10 Speed Road Bike Rear DerailleurDesigned to deliver precise and reliable shifting, whatever challenge you meet on the road, this Rear Derailleur from SRAM is the ideal addition to your setup. Made from a carbon fibre outer cage and a magnesium inner link, this lightweight component weighs in at only 174g for a hard-wearing component that won't add unnecessary weight. What's more, this rear derailleur features SRAM's Exact Actuation™ technology for precise, smooth shifting, through every gear in the 10-speed shifting range.Features:Material: Aluminium B-Knuckle, Magnesium inner link, Carbon-Fibre/Aluminium cageCage Length/Type: Short Cage onlySpeed: 10 SpeedExact Actuation provides precise, clean shifting throughout the entire range of gearsCarbon-fibre outer cage and magnesium provide strength and reduces weightCompatible With: 10-speed cassettes up to the largest cog of 28 teeth, SRAM Rival and SRAM Red componentsWeight: 174gPart No: RD-FRC-A1Technologies:Exact Actuation™: When we launched our road technology from scratch we reapplied our MTB proven SRAM 1:1 actuation ratio (shifter cable travel: derailleur movement). EA helps to simplify and stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing, and exact cable tension. The result: the easiest index shifting system to set up—and it stays that way.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM X3 7-8 Speed Rear DerailleurBringing you smooth and reliable shifting at a more affordable price point, the X3 Rear Derailleur is suitable for use on both 7 and 8-speed drivetrains. SRAM has made this long cage mechanism compatible with up to 11-32T cassettes, so you’ll always be able to get into the right gear for any riding situation.Features: Speed: 7/8-Speed Compatibility: All SRAM 7 and 8-Speed flat bar shifters Maximum Cassette Size: 11-32T Capacity: Long 45T Technologies: 1:1 actuation, Di.R.T: Direct Route Technology Cage Type: Long Cage Material: Aluminium Mounting: Standard hanger mount Clutch Type: No Use: Mountain Bike (MTB), Hybrid Manufacturer's Part Number: RD-X3-A1Weight: 210gBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM X5 10 Speed Rear DerailleurDesigned with SRAM's expert technology, this 10 Speed Rear Derailleur benefits from Exact Actuation and Direct Route Technology for precise and effortless shifting. This dependable derailleur can be adjusted to suit whatever challenges you meet on the trail, making this reliable component the top choice for mountain bike (MTB) riders. Features:Use: Mountain BikeSpeed: 10 speedMaterial: Alloy B-Knuckle, Alloy Links, High Strength Grilon Composite P-KnuckleCage Material: Aluminium, Aluminium SteelCage Sizes: Long, MediumCapacity: Medium 39T; Long 47TSRAM Exact Actuation for precise and dependable 10-speed performanceDirect Route Technology for lighter effort shiftingCompatibility: 36-tooth cassettePart No: RD-X5-A1Technologies:Exact Actuation: When SRAM launched the road technology from scratch they reapplied the MTB proven SRAM 1:1 actuation ratio (shifter cable travel: derailleur movement) for 10 speed rear shifting. Exact Actuation helps to simplify/stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension. The result: the easiest index shifting system to set up and it stays that way.MatchMaker Compatible: Save weight and clutter on the bar with MatchMaker. This system holds AVID® levers, a number of SRAM triggers and the RockShox PushLoc control—all with one tidy, light clamp.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.