When you're looking for superb mud traction combined with outstanding trail riding characteristics, choose the MU01 Zilla Front and MU02 Zilla Rear. Light and fast, the Zilla delivers a smooth ride even on rough trails. Extremely lightweight design provides quicker acceleration and mudslinging traction with great braking power. Added center tread for smoother ride on trails. Predictable high-speed performance. 6-ply rated. Tire Specifications: Rim size: 12 x 7.5 inches. Tire width: 9.3 inches. Overall diameter: 25.2 inches. Tire pressure (PSI) / Load (pounds): 7 / 420. Tread depth: 24/32 inches.