315/80R22.5 Tires

315 is the section width in millimetres, 80 is the aspect ratio (the sidewall is 80% of the width, about 252 mm), and R22.5 means a radial tire for a 22.5-inch wheel. Overall diameter is roughly 42.3 inches.

At ExtraBrake they range from $542.40 to $627.97 per tire, which is $2169.60 to $2511.88 for a set of four.

Only fit a size approved for your vehicle. The manufacturer's recommended size is printed on the driver's door-jamb placard and in the owner's manual; changing size affects speedometer accuracy, load capacity and handling.