Helix Race Carbon e*spec Cranks e*thirteen

Experience elite e‑MTB performance with the Helix Race Carbon espec Cranks*, engineered specifically for Bosch SX, Brose S Mag, TQ HPR50, Avinox, and Specialized 2.2 & 3.1 motor systems. This 21.5mm‑offset, 160mm version is purpose‑built for riders who demand maximum strength, minimal weight, and flawless compatibility.

Developed through years of refinement in carbon layup and molding, the Helix Race Carbon e*spec crankset delivers one of the highest strength‑to‑weight ratios in the e‑MTB world. ASTM 5 approved, they’re light enough for trail and all‑mountain riding yet strong enough for bike‑park laps and aggressive terrain.

With a weight of just 357g (21.5mm offset configuration), these cranks shed serious grams while maintaining the stiffness and durability expected by top riders. The 21.5mm offset ensures optimal fit and Q‑factor alignment for the supported motor systems, giving you a natural, efficient pedaling feel.

Features

• Designed for Bosch SX, Brose S Mag, TQ HPR50, Avinox & Specialized 2.2 / 3.1


• 21.5mm offset for ideal fit and Q‑factor


• Premium carbon construction for maximum strength‑to‑weight


• ASTM 5 rated for aggressive riding


• 160mm crank length for improved clearance and responsive pedaling


• Graphite finish


• Pairs perfectly with the Helix Race e*spec Chainring (sold separately)

Included

• Crankset


• Crank boots (x2)


• Sticker


• User manual

Material

• Carbon

Spindle Compatibility

• 24mm ISIS


• 30mm ETOR


• SRAM DUB

Weight

• 357g (21.5mm offset, Bosch SX / Brose S Mag / TQ HPR50 / Avinox / Specialized 2.2 & 3.1)