Surly Single Cassette Cog 3/32" Splined 20t Diameter-18in 2 Disc Brake Rotor -

2 Disc Brake Rotor - 180mm 6-Bolt Silver

lower bushing and keyways

Designed with both flat and drop bar applications in mind these CNC machined high quality components build upon the ee experience: precision ingenuity and the love of the ride

so over 90% of the road material consists of silica particles in sand and crushed stone that are harder than any metal

Surly Single Cassette Cog 3/32" Splined 20t Diameter-18in 2 Disc Brake Rotor -Surly 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