255/70R22.5 Tires

255 is the section width in millimetres, 70 is the aspect ratio (the sidewall is 70% of the width, about 178.5 mm), and R22.5 means a radial tire for a 22.5-inch wheel. Overall diameter is roughly 36.6 inches.

At ExtraBrake they range from $305.08 to $456.80 per tire, which is $1220.32 to $1827.20 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.