What Our Gearhead(R) Experts Are Saying: "I've been running Rival AXS on my all-road setup and the rear derailleur nails every shift, no matter the terrain. It's super easy to set up with the AXS app and handles everything from steep climbs to fast descents with total confidence."The Rival AXS Rear Derailleur is the wireless engine behind your shifting experience. Built for versatility, it pairs seamlessly with 12-speed cassettes ranging from 10-28T to 10-36T and supports both 1x and 2x setups. Whether you're on pavement, gravel, or rollers of both, Rival AXS provides smooth, reliable shifts and tight chain control that holds fast even over rough surfaces. With SRAM's AXS integration, riders get effortless personalization and system monitoring through a sleek mobile app. Its streamlined aluminum cage keeps weight down while managing your chain with composure and quiet. If you're ready for wireless shifting at a value that punches way above its class, Rival AXS is the go-to choice.