The 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 (rd): black - pulley bearings material: steel - cage material (rd): aluminum