12-speed, medium-length carbon cage Orbit fluid damper for a quiet and secure chain, suitable for 1x and 2x drivetrains, programmable via the AXS App, large X-SYNC guide pulleys with ceramic bearings, battery not included, black / silver Article type Application area Race Functionality electronic Group Red AXS E1 Main color black Mounting Direct mount Secondary color silver System compatibility 12-speed max. sprocket size 36 T. The Sram RED AXS E1 rear derailleur covers cassette ranges from 10-28T to 10-36T and has larger derailleur pulleys to increase drivetrain efficiency. The Orbit fluid damper keeps the derailleur perfectly in place on rough terrain. An ideal derailleur that is ready for 1x or 2x setups, on the road or off-road. Compatible with both 1x and 2x drivetrains, compatible with cassettes from 10-28T to 10-36T, larger X-SYNC pulleys for greater efficiency, compatible with existing AXS batteries (battery not included as standard), AXS technology for easy setup, personalization and high reliability, Orbit fluid damper makes derailleur ideal for rough terrain Sram Article number: 735569 EAN code: 710845899812 Supplier number: 00.7518.184.000 Retail packaging: Yes