2012 Toyota Prius Owners Manual - Page 812

6-1. Specifications Tire size TUBELESS or TUBE TYPE (→P. 506) A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire has a tube inside the tire and the tube maintains the air pressure. Radial tires or bias-ply tires A radial tire has "RADIAL" on the sidewall. A tire not marked "RADIAL" is a bias-ply tire. Summer tires or all season tires (→P. 384) An all season tire has "M+S" on the sidewall. A tire not marked "M+S" is a summer tire. Location of treadwear indicators DOT and Tire Identification Number (TIN) Tire ply composition and materials (→P. 380) (→P. 505) Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies in a tire. Load limit at maximum cold tire inflation pressure Maximum cold tire inflation pressure Uniform tire quality grading (→P. 383) (→P. 498) This means the pressure to which a tire may be inflated. For details, see "Uniform Tire Quality Grading" that follows. "TEMPORARY USE ONLY" (→P. 464) A compact spare tire is identified by the phrase "TEMPORARY USE ONLY" molded on its sidewall. This tire is designed for temporary emergency use only. 504