2012 Toyota Avalon Owners Manual - Page 509

6 -1 . Spe c ific a t ions T ire infor m at ion Typical tire symbols Tire size DOT and Tire Identification Number (TIN) Location of treadwear indicators Uniform tire quality grading (→P. 534) (→P. 533) (→P. 421) For details, see "Uniform Tire Quality Grading" that follows. Tire ply composition and materials Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies in a 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. 532