Box One Chromoly Race Cogs

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 & has a 5mm wide inner base, giving a more solid interface w/ the cassette body.

FEATURES:

• Shimano™ Compatible Driver
• 3/32" or 1/8" Chain Compatible
• Heat-Treated Chromoly
• Heavy Duty