4 & 5mm sizes

Weight - 170g

Colour:Black

With a 50-50 Merino polypropylene blend

The Riser block is suitable for mountain and road bikes

Wolf Tooth Aluminium Single Speed Cog - Shimano HG Splined - Red - Single Speed - 18T Envelope Shipping 4 & 5mm sizesReplacement 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