Surly Single Speed Cogs

for 3/32 chains. Features: Requires ACS Crossfire freewheel tool Removal notch pattern allows for... 63815-0100

speed mountain bike or road bike with this conversion kit!

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 ...