You are here:AllProfile Racing Fixed/TrackComponentsFixed Cogs Fixed Cogs RRP £23.18 Cog Size[Select]13t14t15t16t17t18t19t20t Cog Width[Select]1/8" Thread on Cogs for Fixed Gear hubs. Available in 13-20 tooth sizes, 3/32" and 1/8" sizes. Technical information Brand: Profile Racing Cog Size: 13t, 14t, 15t, 16t, 17t, 18t, 19t, 20t Cog Width: 1/8"