Surly Single Speed Cogs.
- Designed as a singlespeed cog, but may also be stacked and used with 9-speed shifter. Multi gear use will result in slower, less crisp shifting than cogs designed for multi-gear systems
- Fit Shimano freehub splines
- SCM 415 hardened chromoly steel
- Material: Steel
- Cassette Body Type: Shimano 7 Speed
- Tooth Count: 18
- Drivetrain Speeds: Single Speed 3/32"