SRAM EX1 E-Bike Crank Arm 170mm – ISIS Interface
The SRAM EX1 E-Bike Crank Arm 170mm is purpose-built for the demands of modern electric mountain bikes, delivering exceptional strength, reliability, and efficiency under high motor torque. Developed as part of the dedicated SRAM EX1 e-MTB groupset, this crank arm is engineered specifically for e-bike use, not adapted from traditional MTB components.
Constructed from durable, lightweight aluminium, the EX1 crank arm offers excellent stiffness and long-term durability for aggressive trail riding and daily e-MTB use. It features a 170mm crank length and an ISIS bottom bracket interface, making it compatible with leading mid-drive motor systems including Bosch, Brose, and Yamaha.
Ideal as a replacement or upgrade, this crank arm is typically supplied without chainring or bottom bracket, allowing seamless integration into existing EX1 drivetrain setups. Finished in classic SRAM black, it combines performance with a clean, professional appearance.
- Genuine SRAM EX1 e-bike crank arm
- Designed specifically for electric mountain bikes (e-MTB)
- 170mm crank length for balanced power delivery
- ISIS interface for Bosch, Brose & Yamaha mid-drive motors
- Lightweight yet robust aluminium construction
- Optimised for high-torque e-bike applications
- Chainring and bottom bracket sold separately