Profile Racing Aluminum Cassette Cog – 16T

Description-The proprietary 10 spine center of these cogs fit only Profile Racing’s Splined Cassette Drivers.– Aluminum Cogs machined from 7075 Aluminum.– Weight: Aluminum 16t- 22g/.77 oz*Aluminum Cogs are intended for riders 13 years old or younger. They will wear out much faster than CrMo cogs.*