e*thirteen Helix Race Alloy e*spec Cranks for ISIS Spindle - 155mm, 26mm Offset, Black

The ethirteen Helix Race Alloy espec Cranks are a premium, high-strength alternative to carbon fiber, engineered specifically for high-torque ISIS spindle e-bike motors. Forged and precision CNC-sculpted from 6066-T6 aluminum, these ultra-short 155mm crank arms maximize ground clearance on modern low-BB geometries. Featuring a 26.5mm offset for a balanced Q-factor, integrated alloy self-extractors, and impact-absorbing crank boots, they deliver maximum durability and weight-efficient performance on Bosch, TQ, Brose, Yamaha, and specialized e-MTB platforms.