, Whites Rim Lock Nylon 1.60. The Whites Nylon Rim Locks are constructed from a high strength nylon composite material in a one piece moulded design, nylon rim locks weigh up to half as much as a standard aluminium rim lock while gripping the tire more securely and protecting the inner tube better than a traditional rubber rim lock. Their contoured shape reduces abrasions and heat of the tube which provides a more constant and accurate pressure. The Whites Nylon Rim Locks are designed with angled and tapered ribs that lock your tyre securely to the rim, preventing tyre movement and a ripped valve. Lightweight and impact resistant Contoured shape reduces abrasions and heat of the inner tube Angled and tapered ribs secure the tyre to the rim Constructed from high strength nylon composite material Up to half the weight of an aluminium rim lock Grips more securely than a traditional rubber rim lock One piece moulded design