Part No. 08-110060 One piece moulded design made from special high-strength nylon composite material. Super light and impact resistant. Includes the new Motion Pro aluminium LiteLoc rim lock nut and bevelled washer. Weighs only 70 grams with aluminium nut and bevelled 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 aluminium rim locks and only half the weight. Recommended tightening torque on nut is 10 lb/ft Patented design.