e*thirteen Helix Race e*spec Alloy E-MTB Cranks

Premium e-bike cranks without paying for carbon

e*thirteen Helix Race e*spec Alloy cranks are forged and heavily CNC-finished e-MTB cranks that add strength and pedal-strike resistance while taking weight off your bike. Shorter lengths help with pedal clearance on low bottom bracket e-bikes, and built-in alloy self-extracting bolts make fitting and removal easy.

They fit a huge range of motors including Bosch, Brose S Mag, TQ, Fazua, Avinox, SRAM and Specialized SL 1.1, 2.2 and 3.1, with narrow offsets for a traditional MTB Q-factor feel.

The Inside Line:
For the e-biker who enjoys the finer things but would rather spend the carbon money on some post ride beverages.

Features:

Forged and CNC-machined aluminium arms
Self-extracting alloy crank bolts
155, 160 and 165mm lengths
ISIS (21.5mm or 26.5mm offset), Fazua Ride 60, SRAM DUB e-bike and Specialized M30 SL1.1 versions
Black, Sterling Silver and Bronze (ISIS)

Notes:

Chainring not included.
Variants without a stock code are ordered in from e*thirteen on request.

Which version?

26.5mm offset: optimised for Bosch CX Gen4/Gen5 bikes.
21.5mm offset: narrower Q-factor on Bosch SX, Brose, TQ, Avinox and Specialized 2.2/3.1.
SRAM DUB e-bike: for e-bikes with a DUB-spindle motor interface.
Specialized M30 SL1.1: Levo SL / Kenevo SL (SL 1.1 motor).
Not sure? Send us your bike make, model and year and we'll check.

Matching parts:

Chainrings: Helix Race e*spec chainrings, e*spec chainrings or the Turbocharger Race spider, bashguard and chainring. Spares and self-extractors: crank spares and self-extractor kits.