NEW Surly Cogs Driver and Single Cog Surly Single Cassette Cog 3/32" Splined 21t type_car-truck-racks An updated shoulder harness with

An updated shoulder harness with a multiple height adjustment system increase fit and a innovative suspension system cushions bumps and jolts

Lightweight design with built in adjustments for fine tuning

Footrests can be easily adjusted to the right height without the need for any tools

Prime 9 technology offers the same range as a 12-speed drivetrain

NEW Surly Cogs Driver and Single Cog Surly Single Cassette Cog 3/32" Splined 21t type_car-truck-racks An updated shoulder harness withSurly 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: 21 Cassette Body Type: Shimano 7 Speed Material: Steel Drivetrain Speeds: Single Speed 3 32"