BOX One Single-Speed Chromoly Cog

Made for heavy-duty performance, this BOX One single-speed chromoly cog has a 5 mm wide inner base to provide a more solid interface with the cassette body.Heat-treated, CNC-machined chrome-molybdenum construction is exceptionally durable and long-wearingDesigned to fit Shimano-compatible cassette hubsCompatible with 3/32 in. chains