Helix Race Carbon e*spec Cranks

Helix Race Carbon e*spec Cranks represent the pinnacle of ultralight carbon e-bike crank design, the highest strength-to-weight available, for All-Mountain applications.

Through years of development and refinement in carbon layup and molding, we've honed the Helix Race Carbon e*spec cranks to deliver the highest strength-to-weight ratio crankset in the e-MTB world. ASTM 5 approved; light enough for Trail and All-Mountain, strong enough for shuttle days at the bike park, with weights as low as 320g. Shed serious grams, while still getting the strength and stiffness demanded by top pros and discerning enthusiasts alike. Available for a wide range of motors, in progressive arm lengths, with e*thirteen’s trademark attention to detail, Helix Race Carbon e*spec cranks are an awesome upgrade for any weight-conscious e-bike build.

Cranks for ISIS Spindle Motor Systems are available in 21.5mm and 26mm offsets to customize fit, Q-factor, and ride feel. 26mm offset cranks are optimized for Bosch® CX Gen4/Gen5 motor frames, but will fit on all ISIS spindle motors. 21.5mm offset cranks are designed for optimal fit with Bosch® SX, Brose® S-Mag, DJI® Avinox, TQ® HPR50 and Specialized® 2.2 & 3.1 motor systems.