SRAM EX1 E CrankSRAM EX1 E CRANK Lightweight, durable, stiff and designed specifically to work with Bosch and Brose mid ship motors, EX1 crankarms are purpose built for the high torque E MTB environment. SPECIFICATIONS Crank Arm Material Aluminium Crank Arm Lengths 170mm, 175mm Colour Black Interface ISIS FEATURES Proven SRAM technologies adapted for the demands of midship motor E MTBs Compatible with Bosch, Brose and Yamaha bottom bracket interfaces