Box One Single Speed Chromoly Cog

Box One Single-Speed Chromoly Cogs are CNC-machined from long-wearing CNC-machined from chrome-molybdenum. It's designed to fit Shimano-compatible cassette hubs and have a 5mm wide inner base, giving a more solid interface with the cassette body. FEATURES Shimano Compatible Driver Heat-Treated Chromoly 3/32" Chain Compatible Material Chromoly Other Laser-etched logos Weight 13t: 8 grams / 0.3 ounces 14t: 11 grams / 0.4 ounces 15t: 13 grams / 0.5 ounces 16t: 14 grams / 0.8 ounces 17t: 16 grams / 0.6 ounces 18t: 18 grams / 0.65 ounces