The 525 rear tire is ideal for soft to intermediate terrain. Wide self-cleaning tread pattern. Tall aggressive tread design. Reinforced knobs resist tearing and chunking. Note: NHS (NOT for Highway Service). Tire Specifications: Speed/load rating: 68M. Permitted rim size (inches): 2.50 - 3.00. Outside diameter (inches): 27.44. Width (inches): 4.69. Maximum load (pounds): N/A @ 33 PSI. Construction: Tube type.