* The EX1 derailleur capitalizes on the robust build and precise shifting attributes of the X-HORIZON design, to create the worlds first derailleur specifically made for E-MTBs* Engineered to handle high-torque, low-cadence shifting across the 11-48 tooth E-BLOCK cassette* Gives E-MTB riders clean, confident shifts, so they can spend more time enjoying the ride* SRAM Model ID: RD-EX1-A1