Whites Rim Lock CNC Alloy - 2.50CNC machined from billet aluminium the Whites Aggressive Rim Locks are lighter, stronger and reduce heat to the tube compared to rubber rim locks. The serrated edge grips your tyre stronger to reduce abrasions, lowering the temperature of your tube and significantly reducing the chance of the tyre spinning on the rim. CNC machined from billet aluminium Stronger and lighter than traditional rim locks Reduces abrasions and heat of the tube Serrated edge