The Reverse Components Single Speed Kit allows you to convert your conventional hub with a Shimano freewheel body to a single-speed drive. The Reverse Components single speed cog comes with an extra-wide flange of 7mm, which improves the power transmission gently to the freewheel body while improving durability. Available in a variety of colors, these kits allow you to add a pop of color and customize your bike in detail. Features: Available in a variety of colors for complete customization of your bike Single Speed kits fit on Shimano/SRAM freehub bodies Includes 7 spacers, 13 tooth cog, and matching lockring Compatible with single to 12 speed chains Specifications: Type: Single Speed Conversion Kit Speeds: Single Speed (3/32") Drive Type: Shimano/SRAM Color: Blue Weight: 49g (13T)