Surly Track Cog 1/8'' X 17t Silver MFPN=T47OUT-PRX Robert Axle Project thru axles

Robert Axle Project thru axles allow modern frames to be used with axle mount trainers

Model Prime Pro Description Master Cylinder Body/Blade Color Black Left/Right Left Package Each

Unparalleled stopping power and responsiveness

Model Most Day Glove Color Midnight in Maui Size L Finger Full

Surly Track Cog 1/8'' X 17t Silver MFPN=T47OUT-PRX Robert Axle Project thru axlesSurly 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''