ex1 derailleurThe EX1 derailleur capitalizes on the robust build and precise shifting attributes of the X HORIZON design, to create the world's first derailleur specifically made for E MTBs. Engineered to handle high torque, low cadence shifting across the 11 48 tooth E BLOCK cassette, the EX1 derailleur gives E MTB riders clean, confident shifts, so they can spend more time enjoying the ride. Speed (RD): 8s Cable pull ratio: 1: 1 Cage (RD): n a Max tooth: 48 Color