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 that has been standing in excess of three hours, or driven for less than
one mile.
Curb Weight The weight of a standard vehicle, including any optional equipment fitted, and with the correct
fluid levels.
Gross Vehicle Weight 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/in
2
).
CAUTION: This pressure marked on the tire is the maximum allowed by the tire
manufacturer. It is not the pressure Tesla recommends using for Model Y.
Maximum Loaded
Vehicle Weight
The sum of curb weight, accessory weight, vehicle capacity weight, and production options
weight.
Production Options
Weight
The combined weight of options installed which weigh in excess of 3 lb (1.4 kg) more than the
standard items that they replaced, and are not already considered in curb or accessory weights.
PSI (lbf/in
2
)
Pounds per square inch (the unit used to measure tire pressure).
Recommended Tire
Inflation Pressure
Tire inflation pressure, established by Tesla, 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 door pillar.
Rim The metal support for a tire, or tire and tube, upon which the tire beads are seated.
Vehicle Capacity Weight The number of seats multiplied by 150 lbs (68 kg) plus the rated amount of load/luggage.
Load Carrying Definitions
Normal occupant weight 68 kg (150 lbs) times the number of occupants specified in the second column of the tables for
calculating load limits (see the Vehicle Loading topic of this Owner's Manual).
Occupant distribution Distribution of occupants in a vehicle.
Passenger car tire (P or Hard Metric) A tire intended for use on passenger cars, multipurpose passenger vehicles,
and trucks, that have a Technically Permissible Maximum Laden Mass (TPMLM) of 10,000 lbs
(4536 kg) or less.
Light truck tire (LT) A tire for use where additional load carrying capability is needed.
Rim diameter Nominal diameter of the bead seat.
Rim size designation Rim diameter and width.
Rim type designation The manufacturing industry's designation for a rim by style or code.
Rim width Nominal distance between the rim's flanges.
Vehicle maximum load on
the tire
Load on an individual tire that is determined by distributing to each axle its share of the
maximum loaded vehicle weight and dividing by two.
Vehicle normal load on the
tire
Load on an individual tire that is determined by distributing to each axle its share of the curb
weight, accessory weight, and normal occupant weight and dividing by two.
Pneumatic Radial Tire Definitions
Bead separation A breakdown of the bond between components in the bead.
Wheels and Tires
203Specifications
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