2009 Cadillac DTS Owner's Manual - Page 354

(E) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (F) Uniform Tire Quality Grading (UTQG): Tire manufacturers are required to grade tires based on three performance factors: treadwear, traction and temperature resistance. For more information see Uniform Tire Quality Grading on page 5-70. (G) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load. For information on recommended tire pressure see Inflation - Tire Pressure on page 5-57 and Loading the Vehicle on page 4-19. Compact Spare Tire Example (A) Temporary Use Only: The compact spare tire or temporary use tire has a tread life of approximately 3,000 miles (5 000 km) and should not be driven at speeds over 65 mph (105 km/h). The compact spare tire is for emergency use when a regular road tire has lost air and gone flat. See Spare Tire on page 5-85 and If a Tire Goes Flat on page 5-74. (B) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. 5-50