Surly Track Cog 1/8'' X 19t Silver MFPN=RD19-SR12EPS and a more stable

and a more stable

Powdercoat finish with independently adjustable arms

41 BB/Frame Interface BB107 BB Shell Width (mm) 107 Spindle Interface Type SRAM DUB Defined Color Black

Wolf Tooth has what you need in the form of a beautifully machined asymmetrical 96 mm BCD that provides the ideal 1X chainline of 49mm

Mud or loose rocks can’t knock this out of adjustment

Surly Track Cog 1/8'' X 19t Silver MFPN=RD19-SR12EPS and a more stableSurly 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 19 Size 1 8''