e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH SX-Brose S Mag-TQ HPR50 21.5mm Offset 165mm Self Extractor

A high-performance weight-optimized alternative to carbon fiber for riders who prefer alloy cranks. These cranks are engineered for compatibility with Bosch Gen 4, Brose S Mag TQ, HPR 50, Fazua, Yamaha, Maxon, and Specialized Brose motor systems. The cranks come in short lengths starting at 155mm for improved pedal clearance and are tested to E-Enduro standards.