The 230 Tour Master is designed to carry high loads for long distances, in wet or dry conditions. Designed for long distance, high-speed riding. Tubeless four-ply Aramid belted carcass. Staggered tread design offers a quiet ride with excellent handling. V-rated (unless noted). DOT approved. Tire Specifications: Load / speed index: 57V. Recommended rim (inches): 2.50. Overall diameter (inches): 26.10. Overall width (inches): 3.98. Maximum load (pounds) / PSI: 507 @ 42 PSI. Construction: Bias / tubeless.