Surly Single Cassette Cog 3/32" Splined 20t Advertised Weight-0.7 Cartridge Bearing Angle 36x45 Bearing

Cartridge Bearing Angle 36x45 Bearing Type Cartridge Bearing O

Updated Rail damper means less time turning dials and more time shredding trails

or Portland

Brake Compatibility Disc Only Rim Width (Internal) 24 Brake Track None Manufacturer Spec ERD (mm) 554 Valve Presta Color Black Weight 530 Wheel Size 650b Defined Color Black ISO Diameter 584 / 650b / 27

Surly Single Cassette Cog 3/32" Splined 20t Advertised Weight-0.7 Cartridge Bearing Angle 36x45 BearingSurly 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 20 Cassette Body Type Shimano HG 7 Speed Drivetrain Speeds Single Speed 3 32" Material Steel