E*Thirteen

Helix Race Alloy e*spec Crank Arm Set - 21.5mm Offset

A high-performance, weight-optimized alternative to carbon fiber, for riders who prefer alloy cranks. These 24mm ISIS interface cranks are engineered for compatibility with Bosch Gen 4, Brose S Mag, TQ HPR 50, Fazua, Yamaha, Maxon, and Specialized Brose motor systems depending on which offset you choose. They come in short lengths starting at 155mm for improved pedal clearance and are tested to E-Enduro standards.

• 21.5mm offset fits BOSCH SX, Brose S Mag, TQ HPR50 
• Forged and CNC finished for performance with great style 
• Available in short lengths for improved clearance 
• Equipped with built-in alloy self extracting cranks bolts and crank boots 
• Tested to exceed E-Enduro EN17406 Class 4 standards