-19mm splined axles.
-Supplied with a splined steel insert.
Sizes: 25t with 1/8″ tooth width.
HELM SPLINE DRIVE SPROCKET
The Madera Helm Spline Drive sprocket is manufactured from 7075 Aluminum in the USA. This sprocket requires no sprocket bolt. Instead, it has a hardened CrMo steel insert in that matches up to the 48 splines on the BB axle for pure, direct power transfer.
Out of stock