Warp 9 Altis Sigma Front Sprocket

A front sprocket for the Altis Sigma, cut in 428 chain pitch and made from hardened tool steel with a black oxide coating. A larger flange reduces movement on the driveshaft compared with a thinner sprocket, and a new jackshaft seal comes already installed in the sprocket.

Thirteen tooth is the stock size. Fourteen tooth raises top speed and extends range by dropping motor rpm at a given road speed, at the cost of some low-end torque, which is the trade to make if most of your riding is open and fast rather than technical. This will not fit 520 pitch bikes, so confirm your chain pitch first.