Surly Track Cog 1/8'' X 17t Silver ModelNumber=1958 } Rear Derailleur Carbon Inner

} Rear Derailleur Carbon Inner Cage Red AXS E1 Including Titanium Screws SRAM Model ID: RD-SPP-A0

} 700 lumens USB-C rechargeable front light

Hinged clamp offers simple and easy installation

and 55mm chainlines

Aluminum lever blades with return springs

Surly Track Cog 1/8'' X 17t Silver ModelNumber=1958 } Rear Derailleur Carbon InnerSurly 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 17 Size 1 8''