Moroso Drag Special front tires feature tubeless tire construction and a 2-ply nylon cord to reduce unsprung weight. The high cord angle, combined with a unique tread design, reduces rolling resistance for increased speeds, while their shallow tread depth increases stability at high speeds. Lastly, a stronger mounting bead withstands higher pressures when adjusting for roll-out. Recommended Rim Width 3.5-5 in. Tire Overall Diameter: 27.7'' Average Roll Out/Circumference: 87.7'' Tire Tread Width: 4.1'' Wheel Diameter: 15'' Required Wheel Width: 3.5'' - 5.0'' Tire Weight:11.0 lbs Recommmended Operating Pressure: 30-35 psi