2011 Toyota Prius Owners Manual - Page 603

6-1. Specifications Tire ply composition and materials Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies in a tire. Summer tire or all season tire (→P. 458) An all season tire has "M+S" on the sidewall. A tire not marked "M+S" is a summer tire. Radial tires or bias-ply tires A radial tire has RADIAL on the sidewall. A tire not marked RADIAL is a bias-ply tire. TUBELESS or TUBE TYPE A tubeless tire does not have a tube and air is directly filled in the tire. A tube type tire has a tube inside the tire and the tube maintains the air pressure. Load limit at maximum cold tire inflation pressure Maximum cold tire inflation pressure This means the pressure to which a tire may be inflated. (→P. 588) (→P. 588) Uniform Tire Quality Grading For details, see "Uniform Tire Quality Grading" that follows. "TEMPORARY USE ONLY" (→P. 533) A compact spare tire is identified by the phrase "TEMPORARY USE ONLY" molded into its sidewall. This tire is designed for temporary emergency use only. 582 PRIUS_U (OM47685U) DVD