One piece molded design made from special high-strength nylon composite material Super light and impact resistant Includes the new Motion Pro aluminum LiteLoc rim lock nut and beveled washer Weighs only 44 grams (1.55 oz) with aluminum nut and beveled washer Unique contoured shape protects inner tube from abrasion and reduces heat Unique angled and tapered ribs lock tire securely to rim Tested 10 to 20 percent stronger than cast aluminum rim locks and only half the weight Recommended tightening torque on nut is10 ft-lbs Patented design