NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 17t Silver type_protective-pads-armor The carbon wheel that helped

The carbon wheel that helped pioneer the Firecrest rim platform for improved aerodynamics and crosswind stability also features the unspoken durability that has repeatedly won Paris Roubaix and the Tour of Flanders

Rear Derailleur: Shimano GRX RD-RX812 Rear Derailleur - 11-Speed

Steps between gears are optimized to give an even spread between shifts

GENERATION: Deore XT M8000

Axle Diameter (mm): 12

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 17t Silver type_protective-pads-armor The carbon wheel that helpedSurly 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