Protaper 033207 PTR Rear Sprocket - Aluminum suspension-bearings-king-pins AST Suspension is a monotube

AST Suspension is a monotube design

Cushioned knee friendly surface

Bead blasted anodized finish for maximum strength and durability

K and N developed and manufactures the only air filtration system of its kind

Fits all standard 4

Protaper 033207 PTR Rear Sprocket - Aluminum suspension-bearings-king-pins AST Suspension is a monotubeRace Spec (RS) Rear Sprockets feature our revolutionary Angled Mud Groove. This exclusive design creates a self cleaning effect during operation, shedding away mud that would otherwise lead to horsepower loss and sprocket wear. With their precise CNC machining and unique layout, these grooves also allow an increase in tooth surface area of up to 40% over competing sprockets. As a result, contact with the chain is significantly improved, leading to a