SRAM EX1 Ebike Crank Arm Set - 175mm For Bosch Brose and Yamaha Direct Mount ISIS Black. The EX1 drive train was designed specifically for the demands of electric-assist mountain bikes: a wide gear range with bigger jumps between gears and sturdy components to handle higher torque loads. Liberal use of features found on SRAM's high end MTB parts provide high value quiet operation and ease of service.

Built for high torque E-MTB conditions

Use with Bosch-compatible or Direct Mount SRAM X-Sync chainrings (sold separately)