2024 MAZDA CX90 tire size

Tire Ply Composition and Materials
Used
The number of plies indicates the
number of layers of rubber-coated
fabric in the tire. In general, the greater
the number of plies, the more weight a
tire can support. Tire manufacturers
also must indicate the tire materials,
which include steel, nylon, polyester,
and other.
Maximum Load Rating
This number indicates the maximum
load in kilograms and pounds that can
be carried by the tire.
Maximum Permissible Inflation
Pressure
This number is the greatest amount of
air pressure that should ever be put in
the tire under normal driving
conditions.
Tread Wear, Traction and Temperature
Grades
Trea d wea r : The tread wear grade is a
comparative rating based on the wear
rate of the tire when tested under
controlled conditions on a specified
government test course. For example,
a tire graded 150 would wear one and
one-half (1 1/2) times as well on the
government course as a tire graded
100.
Tra c t i o n : The traction grades, from
highest to lowest are AA, A, B, and C.
The grades represent the tire's ability
to stop on wet pavement as measured
under controlled conditions on
specified government test surfaces of
asphalt and concrete. A tire marked C
may have poor traction performance.
Temperature: The temperature grades
are A (the highest), B and C,
representing the tire's resistance to the
generation of heat and its ability to
dissipate heat when tested under
controlled conditions on a specified
indoor laboratory test wheel.
Snow Tires
In some heavy snow areas, local
governments may require true snow
tires, those with very deeply cut tread.
These tires should only be used in pairs
or placed on all four wheels. Make
sure you purchase snow tires that are
the same size and construction type as
the other tires on your vehicle.
SAFETY WARNING
The following safety warning appears
on the tire's sidewall.
SERIOUS INJURY MAY RESULT FROM:
EXPLOSION OF TIRE/RIM ASSEMBLY
DUE TO IMPROPER
MOUNTING-MATCH TIRE
DIAMETER TO RIM DIAMETER;
NEVER EXCEED 40 psi (275 kPa) TO
SEAT BEADS-ONLY SPECIALLY
TRAINED PERSONS SHOULD
MOUNT TIRES.
TIRE FAILURE DUE TO UNDER-INFLATION/
OVERLOADING/DAMAGE-FOLLOW
OWNER'S MANUAL AND PLACARD
IN VEHICLE-FREQUENTLY CHECK
INFLATION PRESSURE AND INSPECT
FOR DAMAGE.
Specifications/Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
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Information on
Te m p o ra r y Ti r e s
Please refer to the sample below.
1. Temporary tires
2. Nominal width of tire in millimeters
3. Ratio of height to width (aspect rat io)
4. Diagonal
5. Rim diameter code
6. Load index & speed symbol

T115/70D16 90M is an example of a
tire size and load index rating. Here is
an explanation of the various
components of that tire size and load
index rating. Note that the tire size and
load index rating may be different from
the example.
T
Indicates a tire that may be installed on
cars, SUVs, minivans and light trucks as
designated by the Tire and Rim
Association (T&RA).
115
“115” is the nomina l width of the tire
in millimeters. This three-digit number
gives the width in millimeters of the
tire from sidewall edge to sidewall
edge. In general, the larger the
number, the wider the tire.
70
“70” is the aspect ratio. This two-digit
number indicates the tire's ratio of
height to width.
D
“D” is the tire construction symbol. D
indicates “diagonal ply construction”.
16
“16” is the wheel rim diameter in
inches.
90
“90” is the Load Index. This two-or
three-digit number indicates how
much weight each tire can support.
M
“M” is the speed rating. The speed
rating denotes the maximum speed for
which the use of the tire is rated.
Letter Rating Speed Rating
M 81 mph
Specifications/Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
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Location of the Tire Label(Placard)
You will find the tire label containing
tire inflation pressure by tire size and
other important information on the
driver's side B-pillar or on the edge of
the driver's door frame.

SAMPLE
Recommended Tire
Inflation Pressure
On the tire label you will find the
recommended tire inflation pressure in
both kPa and psi for the tires installed
as original equipment on the vehicle. It
is very important that the inflation
pressure of the tires on your vehicle is
maintained at the recommended
pressure. You should check the tire
pressure regularly to insure that the
proper inflation pressure is maintained.
Refer to Tires on page 10-71.
NOTE
Tire pressures listed on the vehicle
placard or tire information label
indicate the recommended cold tire
inflation pressure, measured when the
tires are cold, after the vehicle has
been parked for at least 3 hours. As
you drive, the temperature in the tire
warms up, increasing the tire pressure.
WARNING
Always check the tire inflation
pressures on a regular basis according
to the recommended tire inflation
pressure on the tire label and in
conjunction with the information in
this owner's manual.
Driving your vehicle with
under-inflated tires is dangerous.
Specifications/Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
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Glossary of Terms
Tire Placard: A label indicating the OE
tire sizes, recommended inflation
pressure, and the maximum weight the
vehicle can carry.
Tire Identification Number (TIN):
A
number on the sidewall of each tire
providing information about the tire
brand and manufacturing plant, tire
size, and date of manufacture.
Inflation Pressure:
A measure of the
amount of air in a tire.
kPa: Kilopascal, the metric unit for air
pressure.
psi: Pounds per square inch, the
English unit for air pressure.
B-pillar: The structural member at the
side of the vehicle behind the front
door.
Original Equipment (OE): Describes
components originally equipped on
the vehicle.
Vehicle Load Limit: The maximum
value of the combination weight of
occupants and cargo.
Bead Area of the Tire: Area of the tire
next to the rim.
Sidewall Area of the Tire: Area
between the bead area and the tread.
Tread Area of the Tire: Area on the
perimeter of the tire that contacts the
road when it's mounted on the
vehicle.

Seating capacity means the total
allowable number of vehicle
occupants. Seating capacity is
described on the tire label.

Production options weight is the
combination weight of installed regular
production options weighing over 2.3
kilograms in excess of the standard
items which they replace, and not
previously considered in the curb
weight or accessory weight, including
heavy duty brakes, ride levelers, roof
rack, heavy duty battery, and special
trim.

Rim is the metal support (wheel) for a
tire or a tire and tube assembly upon
which the tire beads are seated.
Specifications/Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
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Ve h i c l e L o a d i n g
This section will guide you in the proper loading of your vehicle and/or trailer, to
keep your loaded vehicle weight within its design rating capability, with or without a
trailer. Properly loading your vehicle will provide maximum return of vehicle design
performance. Before loading your vehicle, familiarize yourself with the following
terms for determining your vehicle's weight ratings, with or without a trailer, from
the vehicle's Safety Certification Label and Tire and Load Information Label:
WARNING
Overloaded Vehicle.
Overloading a vehicle is dangerous. The results of overloading can have serious
consequences in terms of passenger sa fety. Too much weight on a vehicle's
suspension system can cause spring or shoc k absorber failure, brake failure, handling
or steering problems, irregular tire wear, tire failure or other damage.
Overloading makes a vehicle harder to drive and control. It also increases the
distance required for stopping. In cases of serious overloading , brakes can fail
completely, particularly on steep grades. The load a tire will carry safely is a
combination of the size of the tire, its load range, and corresponding inflation
pressure.
Never overload the vehicle and always observe the vehicle's weight ratings from the
vehicle's Safety Certification and Tire and Load Information labels.
Base Curb Weight is the weight of the ve hicle including a full tank of fuel and all
standard equipment. It does not include passengers, cargo, or optional
equipment.

Ve h i c l e C u r b We i g h t is the weight of your new vehicle when you picked it up from
your dealer plus any aftermarket equipment.

PAY LOA D
PAYLOAD
Specifications/Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
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Tires
Sample tire mark and its meaning
1. Nominal section width
2. Nominal aspect ratio in %
3. Construction code
4. Nominal rim diameter in inches
5. Load index (not on ZR tires)
6. Speed symbol
7. Mud and snow

Tire mark information
Choose the proper tires for your vehicle using the following tire mark information.
Speed symbol Maximum permissible speed
Q Up to 160 km/h (99 mph)
R Up to 170 km/h (105 mph)
S Up to 180 km/h (111 mph)
T Up to 190 km/h (118 mph)
U Up to 200 km/h (124 mph)
H Up to 210 km/h (130 mph)
V Up to 240 km/h (149 mph)
W Up to 270 km/h (167 mph)
Y Up to 300 km/h (186 mph)
ZR Over 240 km/h (149 mph)
Tire and inflation pressure
NOTE
The tires have been optimally matched with the chassis of your vehicle.
When replacing tires, Mazda recommends that you replace tires of the same type
originally fitted to your vehicle. For details, contact an Authorized Mazda Dealer.
Check the tire pressure label for tire size and inflation pressure.
Refer to Tire Pressure Label on page 10-61.
Specifications/Customer Information and Reporting Safety Defects
Ve h i c l e Specification
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Standard tire
(U.S.A. and Canada)
Tire sizeInflation pressure
Front Rear
265/55R19 109V 250 kPa (2.5 bar, 36 psi)250 kPa (2.5 bar, 36 psi)
275/45R21 110W
*1250 kPa (2.5 bar, 36 psi) 270 kPa (2.7 bar, 39 psi)
Single occupant’s weight: About 75 kg*1 Before driving at high speeds, increase the pressure of the tires. For speeds above 175 km/h (109
mph), increase the pressure of the tires by 40 kPa (0.4 bar, 5.8 psi).
After high-speed driving, returning to standard tire pressure is recommended.
Temporary spare tire*
Tire size Inflation pressure
T155/90D18 113M 420 kPa (4.2 bar, 60 psi)

Lug nut tightening torque
When installing a tire, tighten the lug nut to the following torque.
108―147 N·m (12―14 kgf·m, 80―108 ft·lbf)
Specifications/Customer Information and Reporting Safety Defects
Ve h i c l e
Specification
10-72*Some models.
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