Surly Single Cassette Cog 3/32" Splined 19t MFPN=11.4118.103.671 Includes shim for bar diameters

Includes shim for bar diameters 35

UCI-certified track bike

Misc 140mm

Pressure Relief Valve upgrade kits available

Surly Single Cassette Cog 3/32" Splined 19t MFPN=11.4118.103.671 Includes shim for bar diametersSurly Single Speed Cogs. Designed as a singlespeed cog but may also be stacked and used with 9 speed shifter. Multi gear use will result in slower less crisp shifting than cogs designed for multi gear systems Fit Shimano freehub splines SCM 415 hardened chromoly steel Photo for color and material reference only Tooth Count 19 Cassette Body Type Shimano HG 7 Speed Drivetrain Speeds Single Speed 3 32" Material Steel