Sprockets are precision manufactured and induction hardened to precise tolerances to improve concentricity and provide a stronger, quieter and longer-lasting sprocket
Plated to resist corrosion and provide the factory works look
Drilled lightening holes reduce rotating mass
F5 PTFE black rear sprockets are built for endurance and are hard anodized with a jet black dye, then coated with PTFE for added lubricity