suspension SUBARU BRZ 2022 User Guide

Tires and Wheels
363
Maintenance and Service11
– CONTINUED –
■
Wheel Balance
Each wheel was correctly balanced
when your vehicle was new, but the
wheels will become unbalanced as
the tires become worn during use.
Wheel imbalance causes the
steering wheel to vibrate slightly at
certain vehicle speeds and detracts
from the vehicle’s straight-line
stability. It can also cause steering
and suspension system problems
and abnormal tire wear. If you
suspect that the wheels are not
correctly balanced, have them
checked and adjusted by your
SUBARU dealer. Also have them
adjusted after tire repairs and after
tire rotation.
NOTEThe suspension system is
designed to hold each wheel at a
certain alignment (relative to the
other wheels and to the road) for
optimum straight-line stability
and cornering performance.■
Wear Indicators1) New tread
2) Worn tread3)
Tread wear indicator
Each tire incorporates a tread wear
indicator, which becomes visible
when the depth of the tread grooves
decreases to 0.063 in (1.6 mm). A tire must be replaced when the
tread wear indicator appears as a
solid band across the tread.
NOTEFor safety, inspect the tire tread
regularly and replace the tires
before their tread wear indicators
become visible.
CAUTION
Loss of correct wheel align-
ment causes the tires to wear
on one side and reduces the
vehicle’s running stability.
Contact your SUBARU dealer
if you notice abnormal tire
wear.
12
3
B00327
WARNING
When a tire’s tread wear indi-
cator becomes visible, the tire
is worn beyond the accept-
able limit and must be
replaced immediately. With a
tire in this condition, driving at
high speeds in wet weather
can cause the vehicle to
hydroplane. The resulting loss
of vehicle control can lead to
an accident.
B5=B8.ERRN 363 ページ ２０２１年７月５日　月曜日　午後>1時>1>1分

Tire Information
405
Consumer Information and Reporting Safety Defects13
– CONTINUED –
restraint system weighing 11 lbs (5
kg) is installed in the vehicle for the
child to use, the calculations are as
follows:
1. Calculate the total weight.
2. Calculate the available load
capacity.3. The total weight now exceeds
the capacity weight by 22 lbs (10
kg), so the cargo weight must be
reduced by 22 lbs (10 kg) or more.
■
Determining Compatibility of
Tire and Vehicle Load Capac-
itiesThe sum of four tires’ maximum
load ratings must exceed the
maximum loaded vehicle weight
(“GVWR”). In addition, sum of the
maximum load ratings of two front
tires and of two rear tires must
exceed each axle’s maximum
loaded capacity (“GVWR”). Original
equipment tires are designed to
fulfill those conditions.
The maximum loaded vehicle
weight is referred to Gross Vehicle
Weight Rating (GVWR). And each
axle’s maximum loaded capacity is
referred to Gross Axle Weight
Rating (GAWR). The GVWR and
each axle’s GAWR are shown on
the vehicle certification label affixed
to the driver’s door. The GVWR and front and rear
GAWRs are determined by not only
the maximum load rating of tires but
also loaded capacities of the
vehicle’s suspension, axles and
other parts of the body.
Therefore, this means that the
vehicle cannot necessarily be
loaded up to the tire’s maximum
load rating on the tire sidewall.
■
Adverse Safety Conse-
quences of Overloading on
Handling and Stopping and
on TiresOverloading could affect vehicle
handling, stopping distance, vehicle
and tire as shown in the following.
This could lead to an accident and
possibly result in severe personal
injury.
 Vehicle stability will deteriorate.
 Heavy and/or high-mounted
loads could increase the risk of
rollover.
 Stopping distance will increase.
 Brakes could overheat and fail.
Total weight
= 165 lbs (75 kg) + 143 lbs (65 kg)
+ 40 lbs (18 kg)
+ 11 lbs (5 kg) + 265 lbs (120 kg)
+ 22 lbs (10 kg) + 176 lbs (80 kg)
= 822 lbs (373 kg) (Occupant)
(Cargo)
(Trailer hitch)
(Child restraint)
(Tongue load)
(Occupant)Available Load Capacity
= 800 lbs (363 kg) 822 lbs (373 kg)
=
22 lbs ( 10 kg)(Vehicle
capacity weight) (Total weight)
A4600BEscusenvhch13.fm 405 ページ ２０２１年７月９日　金曜日　午後４時３９分

Uniform Tire Quality Grading Standards
406Suspension, bearings, axles and
other parts of the body could break
or experience accelerated wear that
will shorten vehicle life.
 Tires could fail.
 Tread separation could occur.
 Tire could separate from its rim.■ Steps for Determining
Correct Load Limit1. Locate the statement “The
combined weight of occupants and
cargo should never exceed XXX kg
or XXX lbs.” on your vehicle’s
placard.
2. Determine the combined weight
of the driver and passengers that
will be riding in your vehicle.
3. Subtract the combined weight of
the driver and passengers from
XXX kg or XXX lbs.
4. The resulting figure equals the
available amount of cargo and
luggage load capacity. For
example, if the “
XXX
” amount equals
1,400 lbs (635 kg) and there will be
five 150 lbs (68 kg) passengers in your vehicle, the amount of avail-
able cargo and luggage load
capacity is 650 lbs (1,400
− 750 (5 ×
150) = 650 lbs).
5. Determine the combined weight
of luggage and cargo being loaded
on the vehicle. That weight may not
safely exceed the available cargo
and luggage load capacity calcu-
lated in Step 4.
6. If your vehicle will be towing a
trailer, load from your trailer will be
transferred to your vehicle. Consult
this manual to determine how this
reduces the available cargo and
luggage load capacity of your
vehicle.
13-3. Uniform Tire Quality Grading StandardsThis information i ndicates the rela-
tive performance of passenger car
tires in the area of treadwear, trac-
tion, and temperature resistance.
This is to aid the consumer in
making an informed choice in the
purchase of tires.
Quality grades can be found where
applicable on the tire sidewall
between tread shoulder and
maximum section width. For
example:
TREADWEAR 200 TRACTION AA
TEMPERATURE A
The quality grades apply to new
pneumatic tires for use on
passenger cars. However, they do
not apply to deep tread, winter type
snow tires, space-saver or tempo-
rary use spare tires, tires with
nominal rim diameters of 12 inches
or less, or to some limited produc-
tion tires.
A4600BEscusenvhch13.fm 406 ページ ２０２１年７月９日　金曜日　午後４時３９分