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250
4-3. Do-it-yourself maintenance
Scion_xB_OM_OM12G05U_(U)
Wheels
If a wheel is bent, cracked or heavily corroded, it should be
replaced.
Otherwise, the tire may separate from the wheel or cause a loss
of handling control.
■Wheel selection
When replacing wheels, care should be taken to ensure that
they are equivalent to those removed in load capacity, diameter,
rim width, and inset
*.
Replacement wheels are available at your Scion dealer.
*: Conventionally referred to as “offset”.
Scion does not recommend using the following:
● Wheels of different sizes or types
● Used wheels
● Bent wheels that have been straightened
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251
4-3. Do-it-yourself maintenance
4
Maintenance and care
Scion_xB_OM_OM12G05U_(U)
■When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning
valves and transmitters that allow the tire pressure warning system to
provide advance warning in the event of a loss in tire inflation pressure.
Whenever wheels are replaced, tire pressure warning valves and trans-
mitters must be installed. (
P. 239)
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in
the Owner’s Manual, as this may resu lt in a loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a
tubeless tire. Doing so may result in an accident, causing death or seri-
ous injury.
■When installing the wheel nuts
●Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened,
leading to bolt or disc wheel damage. In addition, the oil or grease can
cause the wheel nuts to loosen and the wheel may fall off, causing an
accident and resulting in death or serious injury. Remove any oil or
grease from the wheel bolts or wheel nuts.
●Be sure to install the wheel nuts with
the tapered end faci ng inward. Install-
ing the nuts with the tapered end fac-
ing outward can cause wheel to
break and eventually cause a wheel
to come off while driving, which could
lead to an accident resulting in death
or serious injury.Tapered
portion
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5
When trouble arises
301
5-2. Steps to take in an emergency
Scion_xB_OM_OM12G05U_(U)
CAUTION
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly
when cold and inflated to the inflation pressure recommended by the
vehicle manufacturer on the vehicle
placard or tire inflation pressure
label (tire and load information label). (If your vehicle has tires of a differ-
ent size than the size indicated on the vehicle placard or tire inflation
pressure label [tire and load information label], you should determine the
proper tire inflation pr essure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS-ti re pressure warning system) that
illuminates a low tire pressure telltal e (tire pressure warning light) when
one or more of your tires is significantly under-inflated. Accordingly,
when the low tire pressure telltale (tire pre ssure warning light) illumi-
nates, you should stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel effi ciency and tire tread life, and may
affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a sub-
stitute for proper tire ma intenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-inflation has not reached the
level to trigger illu mination of the TPMS low ti re pressure telltale (tire
pressure warning light).
Page 340 of 392
340 6-1. Specifications
Scion_xB_OM_OM12G05U_(U)
Brakes
*1: Minimum pedal clearance when depressed with a force of 66 lbf (294 N,30 kgf) while the engine is running
*2: Parking brake lever travel when pulled up with a force of 45 lbf (200 N,20 kgf)
Steering
Tires and wheels
Pedal clearance*13.4 in. (87 mm)
Pedal free play 0.04 0.24 in. (1 6 mm)
Brake pad wear limit 0.04 in. (1.0 mm)
Parking brake lever travel*25 8 clicks
Fluid type SAE J1703 or FMVSS No.116 DOT 3
Free playLess than 1.2 in. (30 mm)
Tire sizeP205/55R16 89H, T135/70D17 102M
(spare)
Front and rear tire inflation
pressure
(Recommended cold tire
inflation pressure)Driving under normal conditions
Front:
35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear:
32 psi (220 kPa, 2.2 kgf/cm
2 or bar)
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Wheel size 16 6 1/2 J, 17 4T (spare)
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)
Page 345 of 392
345
6-1. Specifications
6
Vehicle specifications
Scion_xB_OM_OM12G05U_(U)
Tire infor mation
Typical tire symbols
Full-size tire
Compact spare tire
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346 6-1. Specifications
Scion_xB_OM_OM12G05U_(U)
Tire size( P. 348)
DOT and Tire Identification Number (TIN) ( P. 347)
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Location of treadwear indicators ( P. 238)
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the
strands which form the plies in a tire.
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked
“RADIAL” is a bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly put into the
tire. A tube type tire has a tube inside the tire and the tube main-
tains the air pressure.
Load limit at maximum cold tire inflation pressure
( P. 241)
Maximum cold tire in flation pressure ( P. 340)
This means the pressure to which a tire may be inflated.
Summer tires or all season tires ( P. 242)
An all season tire has “M+S” on the sidewall. A tire not marked
“M+S” is a summer tire.
“TEMPORARY USE ONLY” ( P. 312)
A compact spare tire is identified by the phrase “TEMPORARY USE
ONLY” molded on its sidewall. This tire is designed for temporary
emergency use only.
Page 347 of 392
347
6-1. Specifications
6
Vehicle specifications
Scion_xB_OM_OM12G05U_(U)
Typical DOT and Tire Identification Number (TIN)
DOT symbol
*
Tire Identification Number
(TIN)
Tire manufacturer’s identifica-
tion mark
Tire size code
Manufacturer’s optional tire
type code (3 or 4 letters)
Manufacturing week
Manufacturing year
*: The DOT symbol certifies thatthe tire conforms to applicable
Federal Motor Vehicle Safety
Standards.
Page 348 of 392
348 6-1. Specifications
Scion_xB_OM_OM12G05U_(U)
Tire size■ Typical tire size information
The illustration indicates typical tire size.
Tire use
(P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index (2 or 3 digits)
Speed symbol
(alphabet with one letter)
■ Tire dimensions
Section width
Tire height
Wheel diameter