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Fast, precise rear shifting is now more attainable than ever. Whether you ride 2x or 1x, tarmac or gravel, the SRAM Red 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 composite X-SYNC pulleys for improved durability and efficiency. SRAM's 12-speed AXS eTap system is not just "one more cog". The nature of eTap's original shift logic was pre-configured and not customizable. AXS gives you that capability and the clean, easily used AXS app. SRAM. The Red AXS 12-speed components, the premium road bike option from SRAM, are meant to be streamlined, which can handle any and all of the 1x or 2x crankset set-ups, as well as 10-26, 10-28, 10-33, and 10-36 12-speed road XDR cassette sizes with the correct cage AXS rear derailleur.

The Red AXS rear derailleur utilizes many familiar SRAM technologies for 12-speed, including increased gear range via X-Range, X-Sync pulleys with steel bearings, and the Orbit cage and chain control system. Orbit is a type of clutch system that utilizes a fluid damper that will not add any pressure on the cage spring at low speed or light loads, making shifting and rear wheel removal easier, but is more active at speed, keeping the chain controlled. This is surely a a key for 1x use, but actually helps drivetrain efficiency and shifting with 2x as well. There are two cage length options: the shorter version has a max large cog capacity of 33T, the longer version has a max large cog capacity of 36T. See the full details below.