Shinko tires feature a high carbon compound in a variety of models to suit all terrain conditions. Works very well in a wide range of soil conditions from mud, sand to intermediate loam. Tall wide spaced knobs offer great self cleaning to provide excellent straight line traction on softer conditions. Rubber compound offers excellent durability for long knob life. Note: NHS (NOT for Highway Service). Tire Specifications: Speed/load rating: 57M. Permitted rim size (inches): 2.15 - 2.75. Outside diameter (inches): 26.1. Width (inches): 3.98. Maximum load (pounds): N/A @ 33 PSI. Construction: Tube type.