The turbo of spike tires bites firmly into icy roads The turbo of spike tires bites firmly into icy roads The tungsten carbide core of each spike is clad in weight-saving aluminum Raceguard belting is a synthesis of special india rubber and several layers of nylon fabric offers very effective protection against penetration punctures while minimizing penalties LTSKN - LiteSkin - Light, thin sidewalls. Advantages: Weight saving and reduced rolling resistance RCGD - RaceGuard - A synthesis of special india rubber and several layers of nylon fabric offers very effective protection against penetration punctures while minimizing penalties