"SRAM RED Rear Derailleur (RD-RED-E-E1). Lighter, faster and more capable than ever, the Force AXS rear derailleur does it all in style. Covering cassette ranges from 10-28T up to 10-36T, this wireless wonder has a new, lighter cage and a larger pulley wheel to increase drivetrain efficiency, and an Orbit fluid damper to keep everything in place over the rough stuff. One derailleur ready for 1x or 2x, on road or off.

FEATURES Orbit chain management technology keeps the drivetrain quiet and secure AXS enabled for easy setup, personalization, and reliability 16 g lighter than previous generation Compatible with both 1x and 2x drivetrains Compatible with cassettes from 10-28T to 10-36T Larger X-SYNC pulleys for increased efficiency Compatible with existing AXS batteries"

- SRAM