Kick Ass Cog, 21t - Red Ano

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