Foundation Single Speed Conversion Kit MAKE THE SWITCHAre you trying to convert your ride into a single speed sans headaches and thrown wrenches? Well, Jenson, has you covered. The Foundation Single Speed Conversion Kit includes two spacers, two cogs (a 16T and an 18T) as well as a lock ring. Multiple cogs and spacers let you dial in your gear ratio, chain-line, and tension with precision. Flex your whip in the streets or just cruise to the cafe, but always look nice and ride smoother while you're doing it. Features Alloy construction is solid and built to last Dual rings and spacers let you perfect your gear ratio, chain-line, and tension Easy to install so you can be out on the roads sooner | Foundation | Single Speed Conversion Kit 16T&18T Cogs, Spacers, Lock Ring