NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 15t Silver fork-type_suspension The Shimano RD-M6100 Rear Derailleur

The Shimano RD-M6100 Rear Derailleur provides efficient and smooth shifting for Deore M6100 12-speed drivetrains

Dark Blue w/yellow dots

Easy-to-use bike hold downs with ratcheting straps grip the bike’s frame

The lightweight and breathable Nimby Short is ideal for hot weather trail riding

Brakes: TRP Spyre-C

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 15t Silver fork-type_suspension The Shimano RD-M6100 Rear DerailleurSurly track cogs are threaded the same as a BMX freewheel (1. 375 x 24 tpi right hand threads). This means that they will fit on single speed rear hubs, as well as BMX freewheel hubs, but this application is not recommended. Track cogs are meant to work on track hubs only. 415 hardened chromoly steel 1. 375" x 24 tpi Photo for color and material reference only Tooth Count: 15