box-one-single-speed-chromoly-cogs
box-one-single-speed-chromoly-cogs, Box One Single-Speed Chromoly Cogs are CNC-machined from long-wearing CNC-machined from chrome-molybdenum. It's designed to fit Shimano(TM) compatible cassette hubs and has a 5mm wide inner base, giving a more solid interface with the cassette body.