Item #LS-38901: This spacer kit converts any Shimano 8 or 9 speed freehub body to a single speed. Kit includes 6 spacers of varying thicknesses for custom adjustments: 2 each at 2mm, 2 each at 5mm and 2 each at 10mm. Spacers are red anodized 6061 aluminum. Cassette lockring and cog (sprocket) not included. Any of the Shimano hyperglide or uniglide splined cassette cogs we have listed can be used for single speed.
