e*thirteen 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, Avinox®, TQ® HPR50 and Specialized® 2.2 & 3.1 motor systems.

Features
Exceeds ASTM 5 standards for Downhill, Bike Park, Enduro and Freeride applications.
Forged, CNC-machined AL-6066-T6 arms paired with a 30mm AL 7050-T7 spindle.
Available in 73mm and 83mm spindle options for enduro and DH bikes.
Offered in popular gravity crank arm lengths: 160mm and 165mm.
Includes molded crank boots, protective polymer decals, APS adjuster and self-extractor system.
83mm crank requires the Helix GR chainring; 73mm crank requires a standard Helix chainring.

Specifications
Chainring: Pairs perfectly with Helix Race e*spec chainring (sold separately)
Color: Graphite
Compatibility: 26mm offset cranks are optimized for Bosch® CX Gen4/Gen5 motor frames, but fit 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
Included: Crankset, crank boots (x2), sticker, user manual
Length: 155mm, 160mm, 165mm (155mm for ISIS 26mm offset and Fazua only)
Material: Carbon
Spindle: Compatible with 24mm ISIS, 30mm ETOR and SRAM® DUB spindles

Mfr Claimed Weight
(165mm)
Fazua Ride 60: 331g
Bosch CX Gen4/5, Brose S Mag (26mm Offset): 349g
Bosch SX, Brose S Mag, TQ HPR50, DJI Avinox, Specialized 2.2 & 3.1 (21/5mm Offset): 357g
SRAM DUB: 330g