One piece molded design made from proprietary high-strength nylon composite Super light and impact resistant Includes the new Motion Pro aluminum LiteLoc rim locknut and beveled washer 2.15 weighs only 68 grams (2.4 oz), 1.60 weighs only 35 grams (1.2 oz) Unique contoured shape protects inner tube from abrasion and reduces heat Unique angled and tapered ribs lock tire securely to rim Our testing shows these rim locks are 10 to 20 percent stronger and more impact resistant than cast aluminum rim lock, and only half the weight Recommended for use on all off-road motorcycles and any application using low tire pressure Patent pending