Profile Racing Cassette Cogs Standard Aluminum

The proprietary 10 spine center of these cogs fit only Profile Racing’s Splined Cassette Drivers.
Standard and Elite Cogs are CNC machined from heat-treated 4340 aircraft alloy steel for strength and durability.
Standard Aluminum Cogs-All 3/32″ width.
*Aluminum Cogs are intended for riders 13 years old or younger. They will wear out much faster than CrMo cogs.*