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 Studded 27.5x2.25 584 Wire Bk/Bsk 55 67 No 378UPC/EAN/GTIN: 4026495749893