Endless Bikes Kick Ass Cog – 21T – Black

– Machined 7075-T6 aluminum Singlespeed cogs
– Wide base prevents the cog from digging into freehub bodies and reduces flex
– Splines are machined for perfect alignment and fit on all mountain cassette hubs
– The shape, width and height of the teeth are CAD designed and optimized for Singlespeed use with 3/32″ chains (1/8″ OK)
– The design offers more contact with the chain rollers for better wear resistance of both the cog and the chain
– Positive engagement prevents chain slippage and makes for a very quiet drivetrain
– 100% made in the USA