The SRAM Rival eTap AXS Derailleur is a very capable and durable derailleur that has been equipped with the latest tech from SRAM. Thanks to SRAM's AXS technology you can enjoy smooth, reliable wireless shifting with this derailleur. No more untidy cables! The SRAM Rival eTap AXS Derailleur is also compatible with 1x or 2x cranks and cassettes of up to 36T, so you can challenge even the steepest climbs! Technically advanced and suited to wide range gearing The SRAM Rival eTap AXS rear derailleur features the same fantastic technology as the more expensive Force and Red derailleurs. Thanks to the X-Sync the chain is picked up earlier and the drivetrain runs more smoothly, so that the derailleur has more control over the chain. Even on rougher terrain. With the SRAM AXS app you can set up your derailleur to shift exactly as you like. And if you have a 2x drivetrain, it's also possible to set up synchronised shifting, whereby the system automatically shifts between the front two chainrings.