2015 Lincoln MKZ Owner Manual Printing 1 - Page 329

Wheels and Tires the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 139. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law. Glossary of Tire Terminology • Tire label: A label showing the original equipment tire sizes, recommended inflation pressure and the maximum weight the vehicle can carry. Tire Identification Number: A number on the sidewall of each tire providing information about the tire brand and manufacturing plant, tire size and date of manufacture. Also referred to as DOT code. Inflation pressure: A measure of the amount of air in a tire. • Standard load: A class of P-metric or Metric tires designed to carry a maximum load at set pressure. For example: For P-metric tires 35 psi (2.4 bar) or 36 (2.5 bar) depending on tire size and for Metric tires 36 psi (2.5 bar). Increasing the inflation pressure beyond this pressure will not increase the tire's load carrying capability. Extra load: A class of P-metric or Metric tires designed to carry a heavier maximum load at 42 psi (2.9 bar). Increasing the inflation pressure beyond this pressure will not increase the tire's load carrying capability. kPa: Kilopascal, a metric unit of air pressure. PSI: Pounds per square inch, a standard unit of air pressure. Cold tire pressure: The tire pressure when the vehicle has been stationary and out of direct sunlight for an hour or more and prior to the vehicle being driven for 1 mile (1.6 km). • Recommended inflation pressure: The cold inflation pressure found on the Safety Compliance Certification Label (affixed to either the door hinge pillar, door-latch post, or the door edge that meets the door-latch post, next to the driver's seating position), or Tire Label located on the B-Pillar or the edge of the driver's door. B-pillar: The structural member at the side of the vehicle behind the front door Bead area of the tire: Area of the tire next to the rim. Sidewall of the tire: Area between the bead area and the tread. Tread area of the tire: Area of the perimeter of the tire that contacts the road when mounted on the vehicle. Rim: The metal support (wheel) for a tire or a tire and tube assembly upon which the tire beads are seated. • • • • • • 326 MKZ (), enUSA