Uniform Tire Quality
Grading System (UTQGS)
▼ Uniform Tire Quality Grading
System (UTQGS)
This information relates to the tire
grading system developed by the U.S.
National Highway
Tra ffi c Safety
Administration for grading tires by
tread wear, traction, and temperature
performance.
▼ 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-a-half times as well on
the government course as a tire graded
100.
The relative performance of tires
depends upon the actual conditions of
their use, however, and may depart
significantly from the norm because of
variations in driving habits, service
practices and differences in road
characteristics and climate.
▼
Traction-AA, A, B, C
The traction grades, from highest to
lowest, are AA, A, B, and C. These
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.
WARNING
The traction grade assigned to this tire
is based on braking (straight ahead)
traction tests and does not include
acceleration cornering (turning),
hydroplaning, or peak traction
characteristics.
▼ Te m p e ra t u r e - A , B , C
The temperature grades A (the
highest), B, and C, represent 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.
Sustained high temperature can cause
the material of the tire to degenerate
and reduce tire life, and excessive
temperatures can lead to sudden tire
failure.
Grade C corresponds to a level of
performance which all passenger
vehicle tires must meet under the
Federal Motor Vehicle Safety Standard
No. 109. Grades B and A represent
higher levels of performance on the
laboratory test wheel than the
minimum required by law.
Customer Information and Reporting Safety Defects
Uniform Tire Quality Grading System (UTQGS)
8-20
CX-30_8HG6-EA-19I_Edition1_new
2019-6-13 18:45:11
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.Tire Maintenance
▼ Tire Maintenance
Improper or inadequate vehicle
maintenance can cause tires to wear
abnormally. Here are some important
maintenance points:
▼Tire
Inflation Pressure
Inspect all tire pressure monthly
(including the spare) when the tires are
cold. Maintain recommended
pressures for the best ride, top
handling , and minimum tire wear. Use
the pressures specified on the vehicle
tire information placard or tire label for
optimum service.
▼Tire Rotation
To equalize tread wear, rotate the tires
every 16,000 km (10,000 miles) at the
latest or sooner if irregular wear
develops. Mazda recommends to
rotate every 8,000 km (5,000 miles) to
help increase tire life and distribute
wear more evenly.
1. Forward
Do not include (TEMPORARY USE
ONLY) spare tire in rotation.
Inspect the tires for uneven wear and
damage. Abnormal wear is usually
caused by one or a combination of the
following:
Incorrect tire pressure
Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
8-27
CX-30_8HG6-EA-19I_Edition1_new
2019-6-13 18:45:11
Index
J
Jack............................................ 7-3
Jump-Starting............................ 7-13
K
Keyless Entry System.................... 3-4
Keys........................................... 3-2Key suspend function..............3-8
Transmitter............................. 3-5
Key Left-in-luggage Compartment
Warning beep (With the advanced
keyless function)....................... 7-38
Key Left-in-vehicle Warning Beep
(With the advanced keyless
function)...................................7-38
Key Removed from Vehicle Warning
Beep.........................................7-37
Key Suspend Function................. 3-8
L
Label Information Chassis number...................... 9-2
Engine number....................... 9-3
Motor vehicle safety standard
label...................................... 9-2
Tire pressure label.................. 9-2
Vehicle emission control
information label.................... 9-2
Vehicle identification
number..................................9-2
Lane Departure Warning sound.. 7-39
Lane Departure Warning System
(LDWS).....................................4-89
Lane-change Signals.................. 4-48
Lane-keep Assist System (LAS) ...........
.............................................. 4-146
Leaving Home Light................... 4-45
Liftgate..................................... 3-19 Luggage compartment.......... 3-27
When liftgate cannot be
opened................................ 7-41
Liftgate Door-lock Switch Inoperable
Warning Beep........................... 7-37
Lights-on Reminder................... 7-36
Light Bulbs
Specifications ......................... 9-7
Lubricant Quality......................... 9-4
Luggage Compartment.............. 5-42 Cargo sub-compartment....... 5-42
Luggage Compartment Light...... 5-35
M
Maintenance Information............................ 6-2
Scheduled (Canada)............... 6-6
Scheduled (Mexico)................6-8
Scheduled (U.S.A. and Puerto
Rico)......................................6-4
Manual Transmission Shift
Pattern...................................... 4-29
Map Lights................................ 5-35
Mazda Connect........................ 5-13 Appendix............................. 5-25
Connected Service................5-33
Mazda Connect Basic
Operations........................... 5-17
Mazda Radar Cruise Control with
Stop & Go function (MRCC with Stop
& Go function)........................4-122 Close proximity warning...... 4-125
Display indication............... 4-124
Setting the system...............4-127
Stop hold control............... 4-131
Mazda Radar Cruise Control with
Stop & Go function (MRCC with Stop
& Go function) System
Warnings.................................. 7-40
Mazda Radar Cruise Control
(MRCC).................................. 4-114
10-6
CX-30_8HG6-EA-19I_Edition1_new 2019-6-13 18:45:11
