Surly Track Cog 1/8'' X 18t Silver CheckoutTitle=Odyssey Pro Conical Headset - Integrated Engineered with Prime 9 drivetrain

Engineered with Prime 9 drivetrain technology

99mm Interface DUB Pedals Thread 9/16 Drivetrain Spacing Road Speed 12 Teeth 50 Crankset Material Carbon

Chainrings are designed for 1x drivetrains

Fabric Weight: Light

Surly Track Cog 1/8'' X 18t Silver CheckoutTitle=Odyssey Pro Conical Headset - Integrated Engineered with Prime 9 drivetrainSurly 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 18 Size 1 8''