The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch).
The combined weight of optional accessories. Some examples of optional accessories are automatic transmission, power steering, power brakes, power windows, power seats, and air conditioning.
The relationship of a tire's height to its width.
: A rubber coated layer of cords between the plies and the tread. Cords may be made from steel or other reinforcing materials.
: The tire bead contains steel wires wrapped by steel cords that hold the tire onto the rim.
Bias Ply Tire:
A pneumatic tire in which the plies are laid at alternate angles less than 90 degrees to the centerline of the tread.
Cold Tire Pressure:
The amount of air pressure in a tire, measured in kPa (kilopascal) or psi (pounds per square inch) before a tire has built up heat from driving.
The weight of a motor vehicle with standard and optional equipment including the maximum capacity of fuel, oil, and coolant, but without passengers and cargo.
A code molded into the sidewall of a tire signifying that the tire is in compliance with the U.S.
Department of Transportation (DOT) Motor Vehicle Safety Standards. The DOT code includes the Tire Identification Number (TIN), an alphanumeric designator which can also identify the tire manufacturer, production plant, brand, and date of production.
: Gross Vehicle Weight Rating.
Gross Axle Weight Rating for the front axle.
Gross Axle Weight Rating for the rear axle.
Intended Outboard Sidewall:
The side of an asymmetrical tire, that must always face outward when mounted on a vehicle.
Kilopascal (kPa): The metric unit for air pressure.
Light Truck (LT-Metric) Tire:
A tire used on light duty trucks and some multipurpose passenger vehicles.
An assigned number ranging from 1 to 279 that corresponds to the load carrying capacity of a tire.
Maximum Inflation Pressure:
The maximum air pressure to which a cold tire can be inflated.
The maximum air pressure is molded onto the sidewall.
Maximum Load Rating
: The load rating for a tire at the maximum permissible inflation pressure for that tire.
Maximum Loaded Vehicle Weight:
The sum of curb weight, accessory weight, vehicle capacity weight, and production options weight.
Normal Occupant Weight:
The number of occupants a vehicle is designed to seat multiplied by 68 kg (150 lb).
Designated seating positions.
Outward Facing Sidewall: The side of an asymmetrical tire that has a particular side that faces outward when mounted on a vehicle. The side of the tire that contains a whitewall, bears white lettering, or bears manufacturer, brand, and/or model name molding that is higher or deeper than the same moldings on the other sidewall of the tire.
Passenger (P-Metric) Tire
: A tire used on passenger cars and some light duty trucks and multipurpose vehicles.
Recommended Inflation Pressure:
Vehicle manufacturer's recommended tire inflation pressure as shown on the tire placard.
Radial Ply Tire:
A pneumatic tire in which the ply cords that extend to the beads are laid at 90 degrees to the centerline of the tread.
A metal support for a tire and upon which the tire beads are seated.
The portion of a tire between the tread and the bead.
An alphanumeric code assigned to a tire indicating the maximum speed at which a tire can operate.
The friction between the tire and the road surface.
The amount of grip provided.
The portion of a tire that comes into contact with the road.
: Narrow bands, sometimes called wear bars, that show across the tread of a tire when only 1.6 mm (1/16 in) of tread remains.
UTQGS (Uniform Tire Quality Grading Standards):
A tire information system that provides consumers with ratings for a tire's traction, temperature, and treadwear. Ratings are determined by tire manufacturers using government testing procedures.
The ratings are molded into the sidewall of the tire.
Vehicle Capacity Weight:
The number of designated seating positions multiplied by 68 kg (150 lb) plus the rated cargo load.
Vehicle Maximum Load on the Tire
: Load on an individual tire due to curb weight, accessory weight, occupant weight, and cargo weight.
A label permanently attached to a vehicle showing the vehicle capacity weight and the original equipment tire size and recommended inflation pressure.
Recreational Vehicle Towing
Recreational vehicle towing refers to towing the vehicle behind another vehicle – such as behind a motor home. The two most common types of recreational vehicle towing are known as dinghy towing and dolly towing. Dinghy towing is towing the vehicle with all four wheels on the ground. Dolly tow ...
Warning: Refer to Approved Equipment for Collision Repair Warning in the Preface section. Warning: Refer to Collision Sectioning Warning in the Preface section. Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section. Disable the SIR System. Refer to SIR Dis ...
Warning: Refer to Approved Equipment for Collision Repair Warning in the Preface section. Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section. Disable the SIR System. Refer to SIR Disabling and Enabling. Disconnect the negative battery cable. Refer ...