Tires: Specifications

The following guide should help you understand the tire designations

P	Passenger car tire (or "T" for temporary-use tire).
185	Nominal width of tire in millimeters. Do not install smaller than minimum size tires shown on the tire inflation placard on the vehicle.
70	Tire height-to-width ratio. Do not install smaller than minimum size tires shown on the tire inflation placard on the vehicle.
R	Radial-ply tire (or "D" for bias-ply tire). Do not install smaller than minimum size tires shown on the tire inflation placard on the vehicle.
14	Nominal rim diameter in inches. Do not install smaller than minimum size tires shown on the tire inflation placard on the vehicle.