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Tire and Loading Glossaries
General Wheel and Tire Terms
Accessory WeightThe combined weight (in excess of those items replaced) of items available as factory
installed equipment.BeadThe 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 PressureThe air pressure in a tire that has been standing in excess of three hours, or driven for less than one mile.Curb WeightThe weight of a standard vehicle, including any optional equipment fitted, and with the
correct
fluid levels.
Gross Vehicle WeightThe 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 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 WeightThe sum of curb weight, accessory weight, vehicle capacity weight, and production options weight.Production Options
WeightThe 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/in2)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.
RimThe metal support for a tire, or tire and tube, upon which the tire beads are seated.Vehicle Capacity
WeightThe number of seats multiplied by 150 lbs (68 kg) plus the rated amount of load/luggage.
Load Carrying Definitions
Normal occupant weight68 kilograms (150 lbs) times the number of occupants specified in the second column
of the tables for calculating load limits (see
Vehicle Loading on page 208).
Occupant distributionDistribution of occupants in a vehicle.Passenger car tireA tire intended for use on passenger cars, multipurpose passenger vehicles, and trucks, that have a
Gross Vehicle Weight Rating (GVWR) of 10,000 lbs (4536 kg) or
less.
Rim diameterNominal diameter of the bead seat.Rim size designationRim diameter and width.Rim type designationThe manufacturing industry
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Vehicle normal load on the
tireLoad 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 separationA breakdown of the bond between components in the bead.Bias ply tireA pneumatic tire in which the ply cords that extend to the beads are laid at alternate angles
substantially less than 90 degrees to the center line of the tread.CarcassThe tire structure, except tread and sidewall rubber which, that when inflated, bears the load.ChunkingThe breaking away of pieces of the tread or sidewall.CordThe strands forming the plies in the tire.Cord separationThe parting of cords from adjacent rubber compounds.CrackingAny parting within the tread, sidewall, or inner liner of the tire extending to cord material.Extra load tireA tire designed to operate at higher loads and higher inflation pressure than the
corresponding standard tire.GrooveThe space between two adjacent tread ribs.Inner linerThe layer(s) forming the inside surface of a tubeless tire that contains the inflating medium
within the tire.Inner liner
separationThe parting of the inner liner from cord material in the carcass.Load ratingThe maximum load that a tire is rated to carry for a given inflation pressure.Maximum load
ratingThe load rating for a tire at the maximum permissible inflation pressure for that tire.Measuring rimThe rim on which a tire is fitted for physical dimension requirements.Open spliceAny parting at any junction of tread, sidewall, or inner liner that extends to the cord material.Outer diameterThe overall diameter of an inflated new tire.Overall widthThe linear distance between the exteriors of the sidewalls of an inflated tire, including
elevations due to labeling, decorations, or protective bands or ribs.PlyA layer of rubber-coated parallel cords.Ply separationA parting of rubber compound between adjacent plies.Pneumatic tireA mechanical device made of rubber, chemicals, fabric and steel or other materials, that,
when mounted on an automotive wheel, provides the traction and contains the gas or
fluid
that sustains the load.
Radial ply tireA pneumatic tire in which the ply cords that extend to the beads are laid at substantially 90
degrees to the center line of the tread.Reinforced tireA tire designed to operate at higher loads and at higher inflation pressures than the
corresponding standard tire.Section widthThe linear distance between the exteriors of the sidewalls of an inflated tire, excluding
elevations due to labeling, decoration, or protective bands.SidewallThe portion of a tire between the tread and bead.Sidewall separationThe parting of the rubber compound from the cord material in the sidewall.
Wheels and Tires
220MODEL Y Owner
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The alert will clear once the Tire Pressure Monitoring System detects that each of your tires is inflated to the
recommended cold pressure.
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T
telematics: 283
temperature: 53, 61, 127, 167, 218
Battery (high voltage), limits: 167
cabin, controls for: 127
heated steering wheel: 53
outside: 61
tires: 218
tesla profiles: 50
Teslacam: 140, 142
third row seats, accessing: 30
third row seats, folding and raising: 30
tie-down straps: 225
tilt/intrusion detection: 138
Tire and Loading Information label: 208
tire noise: 189
Tire Pressure Monitoring System: 188
overview of: 188
tire pressures, checking: 184
tire pressures, displaying: 184
tires: 184, 185, 188, 189, 215, 216, 218
all-season: 189
balancing: 185
chains: 189
inspecting and maintaining: 184
pressures, displaying: 184
pressures, how to check: 184
quality grading: 218
replacing: 185
replacing a tire sensor: 188
rotation: 185
specification: 215
summer: 189
temperature grades: 218
tire markings: 216
traction grade: 218
treadwear grade: 218
wheel configuration: 184
winter: 189
toll system transponders, attaching: 198
torque specifications: 213
touch up body: 193
touchscreen: 5, 7, 8, 52, 149, 193
adding shortcuts: 8
cleaning: 193
customizing My Apps: 8
display settings: 5
frozen: 7
main: 5
overview: 5
rear: 5
reboot: 7
restarting: 52
software updates: 149
unresponsive: 7
towing: 226, 227
towing a trailer: 79
towing instructions: 223
Toybox: 162
TPMS: 188
overview of: 188
Tracking Disabled: 153
traction control: 69
trademarks: 281
Traffic Light and Stop Sign Control: 104
Traffic-Aware Cruise Control: 91
trailer, towing: 79
transmission specifications: 213
transponders, attaching: 198
Transport Canada, contacting: 286
Transport Mode: 223
transporting: 223
trip chart: 176
trip meter: 76
Trip Planner: 157
trunk, front: 20
trunk, rear: 18
turn signals: 60
U
ultrasonic sensors: 88
uniform tire quality grading: 218
Unlock On Park: 16
unlocking: 14
USB devices: 24
connecting: 24
USB flash drive: 138, 140, 142
USB ports: 24
V
Valet mode: 51
vehicle certification label: 208
vehicle dimensions: 210
vehicle ground clearance: 210
Vehicle Hold: 72
Vehicle Identification Number (VIN): 207
vehicle loading: 208
ventilation: 130
video call: 135
Index