Descriptions - Precision molded body made from high-strength nylon composite - Thermoplastic polyurethane cover increases shock absorption and protects against pinch flats - Super light and impact resistant - Includes Motion Pro aluminum LiteLoc™ rim lock nut and beveled washer - Unique angled and tapered ribs lock tire securely to rim - Recommended tightening torque on nut is 10 lb/ft - Patented design