are precision machined from aircraft quality 7075-T6 Aluminium (83% stronger than 6061) and polished to a beautiful lustre, 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.
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