Product details:

The Wolf Tooth Aluminium Single Speed Cog utilises extra tall teeth for reliable chain retention when using a chain tensioner. Fitting perfectly onto any Shimano freehub, this cog is optimised for 9, 10 or 11-speed chains but will work with all chains. Machined in-house at Wolf Tooth's Minnesota HQ from high-grade 7075-T6 aluminium in a variety of vivid colours, this is a great way to add some flair to your beloved single speed. Compatibility These will fit on any Shimano-type freehub spline (geared or single speed) Designed to work with any chain Tooth width optimized for 9-,10-, and 11-speed chains The Wolf Tooth Aluminium Single Speed Cog utilises extra tall teeth for reliable chain retention when using a chain tensioner. Fitting perfectly onto any Shimano freehub, this cog is optimised for 9, 10 or 11-speed chains but will work with all chains.These will fit on any Shimano-type freehub spline (geared or single speed)
Designed to work with any chain
Tooth width optimized for 9-,10-, and 11-speed chains