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'. '.strtoupper('s')ram has also ensured that this model is axs enabled, so riders can benefit from easy personalisation and control wherever their journey takes them'. '.strtoupper('a')nother 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'. '.strtoupper('t')his 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'. '.strtoupper('w')hether you ride 2x or 1x, tarmac or gravel, the sram force etap axs rear derailleur is up for the task'. '.strtoupper('i')t features orbit damper technology for quiet, secure chain management over rough roads and capitalizes on larger x sync pulleys for improved durability and efficiency'. '.strtoupper('o')rbit 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'. '.strtoupper('c')ontrol axs lets you connect your axs enabled components to a mobile app, where you can assign custom actions to your controls'. '.strtoupper('e')verything speaks the same language, and you can even combine road and mountain bike parts to build the party bike of your dreams'. '.strtoupper('p')ersonalise wireless controls open the door to new levels of customisation'. '.strtoupper('w')ith axs, you can personalise your component behavior to match your riding style and preferences'. '.strtoupper('t')urn on enhanced shifting modes, or reassign shifting actions'. '.strtoupper('m')easure the axp mobile app and axs web allow you to monitor your bike's performance and readiness'. '.strtoupper('i')t'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'. '.strtoupper('a')xs 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'. '.strtoupper('x') sync sram x sync chainrings provide the highest level of performance and durability'. '.strtoupper('t')he sram x sync tall square teeth edges engage the chain earlier than traditional triangle shaped teeth'. '.strtoupper('t')he sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain'. '.strtoupper('t')o 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'. '.strtoupper('e')ngineered in germany, x sync rings are an integral part of the sram 1x drivetrain'. '.strtoupper('a')ccept no imitation'. '.strtoupper('o')rbit orbit technology is an innovative form of derailleur motion control'. '.strtoupper('i')t utilises silicon fluid as part of an elegant and ultra lightweight damper system'. '.strtoupper('c')ompared to a standard friction clutch system, orbit technology places no additional resistance on the rear derailleur's spring when under slow or light movement'. '.strtoupper('t')his means easier shifting and rear wheel removal'. '.strtoupper('a')nd while riding, the fluid damper reduces chain bounce'. '.strtoupper('i')t'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.