Upgraded version of the B1 entry-level MTB derailleur for the 1×12 Eagle system with Sram’s proven X-Horizon construction for quiet and consistent shifting throughout the entire cassette. The SX version has recently received a major upgrade in the form of an aluminum body and a pulley for smooth running of the cable.
- only compatible with 1×12 (11-50 / 10-50z cartridge)
- horizontal parallelogram (X-Horizon)
- larger 14-tooth pulley provides the best possible performance even in adverse conditions (X-Sync)
- lockinghangers for easy mounting/dismounting of the rear wheel (Cage Lock)
- sharp and consistent shifting throughout the cassette (X-Actuation)
- direct cable guidance with pulley (Rollamajig)
- steel guide, steel pins
- weight 510 g





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