Cratus Long SRM Origin Crankarms

The hugely popular SRM Origin is a commonly used crank across both road and track disciplines. With a Q factor of 145.5mm; our Cratus SRM crank arms reduce this by 8.5mm. Reducing the Q factor to 133mm on track axles and 137mm on road axles.

Manufactured from 7075-T6 aluminium, anodised black and subtly laser etched with WattShop branding.

These crank arms are only compatible with the 30mm, 29mm (DUB) or 24mm spindles. The latter when using the 24mm to 30mm spindle adapter. They are not compatible with the SRM Track Science (Octalink).