Box One Single Speed Chromo Cogs

The Box One Single Speed Chromo Cog is a CNC-machined, heat-treated chromoly cassette cog for Shimano-compatible cassette hubs. It pairs steel wear life with a 5mm wide inner base for solid engagement, in black with laser-etched logos and 13T to 18T options.

Features

• Heat-treated chromoly for hardness and long wear life under race loads
• Wide inner base gives solid engagement with the cassette body and resists slipping
• Runs narrow 3/32" or wide 1/8" chain
• CNC-machined tooth profile for consistent engagement
• Laser-etched logos

Specs

• Material: Heat-treated chromoly steel
• Driver: Shimano-compatible cassette
• Inner base width: 5mm
• Chain: 3/32" or 1/8"
• Finish: Black, laser-etched logos
• Weights:
  • 13T: 8g (0.3 oz)
  • 14T: 11g (0.4 oz)
  • 15T: 13g (0.5 oz)
  • 16T: 14g (0.8 oz)
  • 17T: 16g (0.6 oz)
  • 18T: 18g (0.65 oz)

Fitment

Fits Shimano-compatible cassette hubs and secures with the hub's lockring or cassette locknut. Not compatible with threaded freewheel hubs.

Shipping is often faster, but some items like this one can take 1–3 weeks to ship.