NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 16t Silver chain_8speed Shimano Dura-Ace RD-R9100 Rear Derailleur

Shimano Dura-Ace RD-R9100 Rear Derailleur

numerous micro knob working edges providing lateral traction and predictability

Hub Finish:Black

C: Down Tube Length (CM): 70

Constructed of 7050 Aluminum

NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 16t Silver chain_8speed Shimano Dura-Ace RD-R9100 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: 16