These chains are designed for mud service use. Made from 7-10mm wire. Extra Heavy Duty Cross Chain and Hooks for the Toughest Situations. Fits Tire Sizes: 37x13.50-15, 305/60-17, 285/65-18, 325/65-18, 325/60-20, 325/50-22, 35x13.50-15, 35x14-15, 35x14.50-15, 36x12.50-15, 37x12.50-15, 38x15-15, 33x13.50-16, 35x13.50-16, 36.5x14-16, 35x14-16.5, 36x12.50-16.5, 36x14-16.5, 38x15.5-16.5, 38.5x15-16.5, 37x12.50-17, 35x13.50-20, 295/65-18, 37x12.50-18, 38x14.50-20, 325/80-16