2018 TOYOTA TUNDRA wheel

6089-1. Specifications
Ty p e B
Ty p e C
Tire sizeP275/65R18 114T
Tire inflation pressure
(Recommended cold
tire inflation pressure)
Front tires:30 psi (210 kPa, 2.1 kgf/cm2 or bar)
Rear tires: 33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Spare tire:
33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Wheel size18  8J
Wheel nut torque
Steel wheels:
154 ft·lbf (209 N·m, 21.3 kgf·m)
Aluminum wheels:
97 ft·lbf (131 N·m, 13.4 kgf·m)
Tire sizeP275/55R20 111H,
P255/70R18 112T (spare tire)
Tire inflation pressure
(Recommended cold
tire inflation pressure)
Front tires:30 psi (210 kPa, 2.1 kgf/cm2 or bar)
Rear tires: 33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Spare tire: 33 psi (230 kPa, 2.3 kgf/cm
2 or bar)
Wheel size20  8J,
18  8J (spare wheel)
Wheel nut torque
Steel wheels:
154 ft·lbf (209 N·m, 21.3 kgf·m)
Aluminum wheels: 97 ft·lbf (131 N·m, 13.4 kgf·m)

6159-1. Specifications
9
Vehicle specifications
DOT symbol*
Tire Identification Number (TIN)
Tire manufacturer’s identification mark
Tire size code
Manufacturer’s optional tire type code (3 or 4 letters)
Manufacturing week
Manufacturing year
Manufacturer’s code
*: The DOT symbol certifies that the tire conforms to applicable Federal
Motor Vehicle Safety Standards.
■Typical tire size information
The illustration i ndicates typical
tire size.
Tire use
(P = Passenger car,
T = Temporary use)
Section widt h (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Typical DOT and Tire Iden tification Number (TIN)
Ty p e AType B
Tire size
1
2
3
4
5
6
7
8
1
2
3
4
5

6169-1. Specifications
Load index
(2 digits or 3 digits)
Speed symbol
(alphabet with one letter)
■Tire dimensions
Section width
Tire height
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
6
7
1
2
3
Tire section names
1
2
3
4
5
6
7
8
9
10
11

6189-1. Specifications
■Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C,
and they represent the tire’s ability to stop on wet pavement a s
measured under controlled conditions on specified government te st
surfaces of asphalt and concrete.
A tire marked C may have p oor traction performance.
Warning: The traction grade assigned to this tire is based on b raking
(straight ahead) traction tests and does not include cornering (turn-
ing) traction.
■Temperature A, B, C
The temperature grades are A ( the highest), B, and C, representing
the tire’s resistance to the ge neration of heat and its ability to dissi-
pate heat when tested under contr olled conditions on a specified
indoor laboratory test wheel.
Sustained high temperature can c ause the material of the tire to
degenerate and reduce tire life, and excessive temperature can lead
to sudden tire failure.
Grade C corresponds to a level of performance which all passeng er
car tires must meet under the Fe deral Motor Vehicle Safety Stan-
dard No. 109.
Grades B and A represent higher levels of performance on the labo-
ratory test wheel than the minimum required by law.
Warning: The temperature grades of a tire assume that it is pro perly
inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either sepa-
rately or in combination, can c ause heat buildup and possible t ire
failure.

6209-1. Specifications
Rim
A metal support for a tire or a tire and tube
assembly upon which the tire beads are
seated
Rim diameter
(Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a
rim by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity
weight (Total load
capacity)The rated cargo and l uggage load plus 150 lb.
(68 kg) times the vehicle’s designated seating
capacity
Vehicle maximum load
on the tire
The load on an individual tire that is deter-
mined by distributing to each axle its share of
the maximum loaded vehicle weight, and
dividing by two
Vehicle normal load on
the tire
The load on an individual tire that is deter-
mined by distributing to each axle its share of
curb weight, accessory weight, and normal
occupant weight (distributed in accordance
with Table 1
* below), and dividing by two
Weather sideThe surface area of the rim not covered by the
inflated tire
Bead
The part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is
shaped to fit the rim
Bead separationA breakdown of the bond between compo-
nents in the bead
Bias ply tire
A pneumatic tire in which the ply cords that
extend to the beads are laid at alternate
angles substantially less than 90 degrees to
the centerline of the tread
CarcassThe tire structure, except tread and sidewall
rubber which, when inflated, bears the load
ChunkingThe breaking away of pieces of the tread or
sidewall
CordThe strands forming th e plies in the tire
Tire related termMeaning

6229-1. Specifications
Open spliceAny parting at any junction of tread, sidewall,
or innerliner that extends to cord material
Outer diameterThe overall diameter of an inflated new tire
Overall width
The linear distance between the exteriors of
the sidewalls of an inflated tire, including ele-
vations due to labeling, decorations, or protec-
tive bands or ribs
Passenger car tire
A tire intended for use on passenger cars,
multipurpose passenger vehicles, and trucks,
that have a gross vehicle weight rating
(GVWR) of 10,000 lb. or less.
PlyA layer of rubber-coated parallel cords
Ply separationA parting of rubber compound between adja-
cent plies
Pneumatic tire
A mechanical device made of rubber, chemi-
cals, fabric and steel or other materials, that,
when mounted on an automotive wheel, pro-
vides the traction and co ntains the gas or fluid
that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that
extend to the beads are laid at substantially 90
degrees to the centerline of the tread
Reinforced tire
A tire designed to operate at higher loads and
at higher inflation pressures than the corre-
sponding standard tire
Section width
The linear distance between the exteriors of
the sidewalls of an inflated tire, excluding ele-
vations due to labeling, decoration, or protec-
tive bands
SidewallThat portion of a tire between the tread and
bead
Sidewall separationThe parting of the rubber compound from the
cord material in the sidewall
Tire related termMeaning

6239-1. Specifications
9
Vehicle specifications
*: Table 1  Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Snow tire
A tire that attains a traction index equal to or
greater than 110, compared to the ASTM E-
1136 Standard Reference Test Tire, when
using the snow traction test as described in
ASTM F-1805-00, Standard Test Method for
Single Wheel Driving Traction in a Straight
Line on Snow-and Ice-Covered Surfaces, and
which is marked with an Alpine Symbol ( )
on at least one sidewall
Te s t r i m
The rim on which a tire is fitted for testing, and
may be any rim listed as appropriate for use
with that tire
TreadThat portion of a tire that comes into contact
with the road
Tread ribA tread section running circumferentially
around a tire
Tread separationPulling away of the tread from the tire carcass
Treadwear indicators
(TWI)The projections within the principal grooves
designed to give a visual indication of the
degrees of wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire
assembly securely during testing
Tire related termMeaning
Designated seating
capacity, Number of
occupantsVehicle normal load,
Number of occupantsOccupant distribution in a normally loaded
vehicle
2 through 422 in front
5 through 1032 in front, 1 in second seat
11 through 155
2 in front, 1 in second
seat, 1 in third seat, 1
in fourth seat
16 through 207
2 in front, 2 in second
seat, 2 in third seat, 1 in fourth seat

649
10
For owners
Secure loose items to prevent weight shifts that could affect the bal-
ance of your vehicle. When the truck camper is loaded, drive to a
scale and weigh on the front and on the rear wheels separately to
determine axle loads. Individual axle loads should not exceed e ither
of the Gross Axle Weight Ratings (GAWR). The total of the axle loads
should not exceed the Gross Vehicle Weight Rating (GVWR). These
ratings are given on the vehicle certification label which is located on
the door latch post on the le ft side of the vehicle. (P. 600) If weight
ratings are exceeded, move or remove items to bring all weights
below the ratings.
Gross axle weight rating
Front GAWR
Rear GAWR
Gross vehicle weight rating
Not exceed GVWR
WARNING
■ Overloading
Be careful — overloading can cause dangerous braking and handli ng prob-
lems, and can damage your vehicle and its tires.
Gross axle and vehicle weight ratings
1
2
1