Rennen Single Speed Cogs are precision machined from aircraft quality 7075-T6 Aluminum ( 83% stronger than 6061) and polished to a beautiful luster, offering the highest performance at the right price. Rennen Cogs are 3/16" thick at the Spline interface assuring that you won't damage your precious hubs. Only Rennen Cogs offer a single speed specific tooth profile which have been designed to extend tooth life. At 0.6oz (17 grams, 16T) this makes Rennen Cogs one of the lightest on the market.

The Perfect Choice for a afternoon SS ride or a Practice Session at the BMX Track!

Cogs are available in all sizes from 13T- 25T, Shimano Spline compatible and will work with 8 & 9 speed chains.