l-guard Solid Industrial tires use full dimension sizing as well as rim guard protection. There is more rubber in the tread that it's so-called competitors. This means longer wear as well as more gripping power throughout the lift of the tire.Solid Tires Tire Size O.D. Section Width Tread Width Tread Depth 18x7-8x4.33 17.9 6.2 5.9 18/32 21x8-9 20.5 7.3 6.7 53/32 500-8x3.0 17.9 5.1 5.0 58/32 600-9x4.0 20.5 6.4 6.4 58/32 650-10x5.0 22.9 6.9 6.8 66/32 700-12x5.0 26.8 7.5 6.5 87/32 815-15x7.0 28.0 8.6 8.3 89/32 1200-20x8.0 45.9 13.0 12.2 123/32
