2005 Toyota Prius Owners Manual - Page 231

-DOT and Tire Identification Number (TIN) 6. Maximum cold tire inflation pressure- This means the pressure to which a tire may be inflated. For recommended cold tire inflation pressure, see "Tires" on page 315. 7. Tire ply composition and materials- Plies mean a layer of rubber − coated parallel cords. Cords mean the strands forming the plies in the tire. 8. "TUBELESS" or "TUBE TYPE" - A tubeless tire does not have a tube inside the tire 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. 9. Radial tires or bias −ply tires- A radial tire has "RADIAL" on the sidewall. The tire not marked with "RADIAL" is a bias −ply tire. The "DOT" symbol certifies that the tire conforms to applicable Federal Motor Vehicle Safety Standards. 21A009a This illustration indicates typical DOT and Tire Identification Number (TIN). 1. "DOT" symbol 2. Tire Identification Number (TIN) 3. Tire manufacturer's identification mark 4. Tire size code 5. Manufacturer's optional tire type code 6. Manufacturing week 7. Manufacturing year 221