E-Thirteen Helix Race Carbon E-Spec BOSCH CX Gen4/SX-Brose S Mag-TQ HPR50 Crank with Self Extractor

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 (Fazua 170mm). 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*thirteens trademark attention to detail, Helix Race Carbon e*spec cranks are an awesome upgrade for any weight-conscious e-bike build.Features:Industry leading strength-to-weight, starting at just 320g (Fazua 170mm)ASTM 5 approved strength and durabilityAvailable for Bosch CX Gen4/5, Bosch SX, Brose S Mag, TQ HPR50, Fazua Ride60, DJI Avinox, Specialized 2.2/3.1, and DUB motor systemsMolded crank boots for rock strike protectionAll models available in shorter 160, and 165mm sizes. Fazua Ride 60 and 26mm Offset Cranks for ISIS Spindle Motor Systems also available in 155mm