Tires and Wheels Glossaries
Tires and Wheels Glossaries
Accessory weight
The combined weight (in excess of those items replaced) of items available as factory-installed equipment.
Bead
The inner edge of a tire that is shaped to fit to the rim and form an air-tight seal. The bead is constructed of steel wires which are wrapped, or reinforced, by the ply cords.
COLD tire pressure
The air pressure in a tire which has been standing in excess of three hours, or driven for less than 1 mile (2 km).
Curb weight
The weight of a standard vehicle, including any optional equipment fitted, and with the correct fluid levels.
Gross Axle Weight Rating
The maximum distributed weight that may be supported by an axle on the vehicle.
Gross Vehicle Weight Rating
The maximum permissible weight of a vehicle with driver, passengers, load, luggage, and equipment.
kPa (kilo pascal)
A metric unit used to measure pressure. One kilo pascal equals approximately 0.145 PSI.
Maximum inflation pressure
The maximum pressure to which the tire should be inflated. This pressure is given on the tire side wall in PSI (lbf/in2).
CAUTION: This pressure is the maximum allowed by the tire manufacturer. It is not the pressure recommended for use.
Production options weight
The combined weight of options installed which weigh in excess of 2 lb (1 kg) more than the standard items that they replaced, and are not already considered in curb or accessory weights.
PSI (lbf/in2)
Pounds per square inch, a unit of measure for pressure.
Recommended Tire Inflation Pressure
Tire inflation pressure, established by Fisker, which is based on the type of tires that are mounted on the vehicle at the factory.This information can be found on the Tire and Loading Information label located on the left B-pillar.
Rim
The metal support for a tire, or tire and tube, upon which the tire beads are seated.
Tire Pressure Monitoring System
A system that detects when one or more of a vehicle's tires are under inflated and illuminates a low tire pressure warning telltale.
Tread
The portion of a tire that comes into contact with the road.
Tread wear indicators (TWI)
The projections within the principal grooves designed to give a visual indication of the degrees of wear of the tread.
Vehicle capacity weight
The number of seats multiplied by XXX lb or XXX kg plus the rated amount of load/luggage. This vehicle capacity weight is stated on the vehicle placard. See Tire and Loading Information Label.