Steel front sprockets are precision-manufactured and induction-hardened to precise tolerances to improve concentricity and provide a stonger, quieter and longer-lasting sprocket Plated to resist corrosion Rear sprockets are available in aluminum, F5 PTFE, CAT5 and steel F5 PTFE black is built for endurance and is hard anodized with jet-black dye, then coated with PTFE for added lubricity CAT5 are CNC manufactured to the tightest tolerances with a unique tooth design: color anodizing which excludes the sweeps, mud grooves and teeth for a flash of color Steel rear sprockets are made from carbon steel and electroplated with a satin black finish that resists corrosion; teeth are hardened so sprocket will hold up to many miles, without affecting strength Steel rear sprockets are also cupped down from the tooth ring to body to reduce as much weight as possible
