Wolf Tooth Aluminium Single Speed Cog - Shimano HG Splined - Black - Single Speed - 20T eBay One of the most advanced

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Wolf Tooth Aluminium Single Speed Cog - Shimano HG Splined - Black - Single Speed - 20T eBay One of the most advancedReplacement cogs for your single speed bike. Wolftooth single speed cogs are light, durable and available in a range of colours and sizes. Features: Weights: 22T= 23g . 20T= 20g . 19T= 18g . 18T= 16g . 17T= 15g . Compatible with Shimano style freehub splines. Designed to work with all chains, however, the cog is optimised for 10 and 11 speed chains. 7075 T6 aluminium. 4. 5mm width to prevent wear to your freehub body. Please note: Depending on your