Pre-Mounted  ST225/75R15 Radial Trailer Tire on Rim -  15" Silver Modular Style Wheel with a 6 Lug on 5.5" Center Bolt Pattern. Tire is Load Range E, 10 Ply Radial, with Max Load of 2830 pounds and Max Pressure of 80 PSI. Aspect Ratio 75, Section Width 225, and Rim Diameter 15 Inches. Speeding Rating M with Load Index 112. Tread Depth 7.8/32nds. Center Bore 3.75" and Offset "0" with Hub Stud Nut Requirement of 1/2-20 60 Degree Cone Nut. (note: some tires will have slight dip/indent on sidewall, called a splice, it occurs in manufacturing, this is not a defect in any way). Warranty Included