wheel size LEXUS RX450h 2015 User Guide

7405-2. Steps to take in an emergency
●
If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)●
If tire chains are used●
Vehicles with a full-size spare tire: If the spare tire is in a location subject to poor
radio wave signal reception●
Vehicles with a full-size spare tire: If a large metallic object which can interfere
with signal reception is pu t in the luggage compartment■
If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute
when the “POWER” switch is turned to ON mode, have it checked by your Lexus
dealer.■
Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features  P. 825)
CAUTION■
When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and
operate using more force than usual.■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury. ●
Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.●
If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change
it with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●
Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■
If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

5
When trouble arises
7415-2. Steps to take in an emergency
CAUTION■
Maintenance of the tires
Each tire, including the spare (if provided ), should be checked monthly when cold
and inflated to the inflation pressure re commended 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 different size than the size indicated on the vehicle
placard or tire inflation pressure label [t ire and load information label], you should
determine the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicl e has been equipped with a tire pressure
monitoring system (TPMS-tire pressure wa rning system) that illuminates a low tire
pressure telltale (tire pressure warning light) when one or more of your tires is sig-
nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres-
sure warning light) illuminates, 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 an d can lead to tire failure. Under-inflation
also reduces fuel efficiency 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 substitute for
proper tire maintenance, and it is the driver's responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger illumination of
the TPMS low tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when th e system is not operating properly. The
TPMS (tire pressure warning system) malf unction indicator is combined with the
low tire pressure telltale (tire pressure warning light). When the system detects a
malfunction, the telltale will flash for approximately one minute and then remain
continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists . When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of rea-
sons, including the installation of replacem ent or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pressure warning system) from functioning
properly. Always check the TPMS (tire pressure warning system) malfunction tell-
tale after replacing one or more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS (tire pressure warning
system) to continue to function properly.

5
When trouble arises
7655-2. Steps to take in an emergency
■ Location of the spare tire, jack and tools
Vehicles with a compact spare tire
Vehicles with a full-size spare tire Towing eyelet Tool bagJack handle
Jack Spare tireWheel nut
wrench Spare tire
cover
Towing eyelet To o l b a gJack handle
Jack Spare tireWheel nut
wrench Spare tire
cover

5
When trouble arises
7695-2. Steps to take in an emergency
Vehicles with a full-size spare tire
Replacing a flat tire
Chock the tires.STEP 1
Flat tire Wheel chock
positions
Front Left-
hand side Behind the
rear right-
hand side tire
Right-
hand side Behind the
rear left-
hand side tire
Rear Left-
hand side In front of the
front right-
hand side tire
Right-
hand side In front of the
front left-
hand side tire

5
When trouble arises
7715-2. Steps to take in an emergency
Installing the spare tire
Remove any dirt or foreign matter
from the wheel contact surface. If foreign matter is on the wheel
contact surface, the wheel nuts
may loosen while the vehicle is in
motion, causing the tire to come
off.
Install the spare tire and loosel y tighten each wheel nut by hand
by approximately the same amount.
Vehicles with a compact spare tire
Tighten the nuts until the tapered
portion comes into loose contact
with the disc wheel seat.
Vehicles with a full-size spare tire
Turn the nuts until the washers
come into contact with the wheel.STEP 1
STEP 2
Disc wheel
seatTapered portion
Wheel nut
Disc wheelWa s h e r

8076-1. Specifications
6
Vehicle specifications Tires and wheels
Type A
Type BTi r e s i z e P235/60R18 102V, T165/90D18 107M (spare)
Tire inflation pressure
(recommended cold tire
inflation pressure) Front: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Rear: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Spare: 60 psi (420 kPa, 4.2 kgf/cm 2
or bar)
Wheel size 18  7 1 /2J, 18  4T (spare)
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)
Ti r e s i z e P235/60R18 102V
Tire inflation pressure
(recommended cold tire
inflation pressure) Front: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Rear: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Spare: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Wheel size 18  7 1 /2J
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)

8086-1. Specifications
Ty p e C
Ty p e DTi r e s i z e P235/55R19 101V, T165/90D18 107M (spare)
Tire inflation pressure
(recommended cold tire
inflation pressure) Driving under normal conditions
Front: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)*
Rear: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)*
Spare: 60 psi (420 kPa, 4.2 kgf/cm 2
or bar)*: When driving at high speeds above 100 mph (160
km/h), in countries where such speeds are permitted by
law, add 3 psi (20 kPa, 0.2 kgf/cm 2
or bar) to the tires.
Never exceed the maximum cold tire inflation pressure
indicated on the tire sidewall.
Wheel size 19  7 1 /2J, 18  4T (spare)
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)
Ti r e s i z e P235/55R19 101V
Tire inflation pressure
(recommended cold tire
inflation pressure) Driving under normal conditions
Front: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Rear: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
Spare: 33 psi (230 kPa, 2.3 kgf/cm 2
or bar)
When driving at high speeds above 100 mph (160 km/h),
in countries where such speeds are permitted by law,
add 3 psi (20 kPa, 0.2 kgf/cm 2
or bar) to the front tires
and rear tires. Never exceed the maximum cold tire
inflation pressure indicated on the tire sidewall.
Wheel size 19  7 1 /2J
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)

8156-1. Specifications
6
Vehicle specifications Typical DOT and tire identification number (TIN)
DOT symbol
*Tire Identificat ion 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 that
the tire conforms to applicable
Federal Motor Vehicle Safety
Standards.
Tire size
■ Typical tire size information
The illustration indicates typical
tire size.
Ti r e u s e
(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 digits or 3 digits)
Speed symbol
(alphabet with one letter)

8206-1. Specifications
Tire related term Meaning
Occupant distribution Distribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options
weight The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the
standard items which they replace, not previously
considered in curb weight or accessory weight,
including heavy duty brakes, ride levelers, roof rack,
heavy duty 12-volt battery, and special trim
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 designation Rim diameter and width
Rim type designation The industry manufacturer's designation for a rim by
style or code
Rim width Nominal distance between rim flanges
Vehicle capacity weight
(Total load capacity) The rated cargo and luggage 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 determined 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 determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight (dis-
tributed in accordance with Table 1
* below), and
dividing by two
We a t h e r s i d e The surface area of the rim not covered by the
inflated tire