Box One Single Speed Cogs

This cog is designed specifically for standard Shimano HG-style cassette hubs. It will not fit onto threaded freewheel hubs or other proprietary cassette body standards.

The 5mm wide base provides a larger contact surface area against the cassette body. This prevents the cog from digging into the hub splines under heavy pedaling loads, ensuring a more secure fit and better power transfer.

While it is optimized for single-speed drivetrains, it is generally compatible with standard 1/8-inch or 3/32-inch single-speed chains. If you are using a multi-speed chain, ensure your chainring and cog tooth profile match for proper engagement.

Yes, as long as your conversion kit uses a standard Shimano-style freehub body. The 5mm base is designed to work seamlessly with most standard spacer kits used to convert multi-speed hubs to single-speed.

You will need a standard cassette lockring tool to tighten the lockring that holds the cog in place. No specialized tools are required for the cog itself, just the standard tools used for any Shimano-style cassette.