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Tire Pressures when Towing
When towing a trailer, tire pressures must be
adjusted to accommodate the additional load.
Keep tires inflated to the pressures shown
below (these pressures override the pressures
that are provided on the Tire and Loading
information label):
Front Tires Rear Tires Cold Tire
Inflation
Pressure
245/45R19 245/45R19 45 psi (310
kPa)
255/45R20
265/45R20
275/45R20 46 psi (320
kPa)
265/35ZR22 285/35ZR22 50 psi (345
kPa)
Warning: Check tire pressures using an
accurate pressure gauge when tires are
cold. Driving 1.5 km warms the tires
suciently to aect tire pressures.
Parking the vehicle in direct sunlight or in
hot weather can also aect tire pressures.
If you must check warm tires, expect
increased pressures. Do not let air out of
warm tires in an attempt to match
recommended cold tire pressures. A hot
tire at or below the recommended cold
tire
inflation pressure is dangerously
under-inflated.
Warning: Never attempt to tow a trailer
when a Model X tire is faulty or has been
inflated using a tire repair kit. A
temporarily repaired tire is not designed
to sustain the towing load. Towing using a
faulty or temporarily repaired tire can
result in tire failure and loss of vehicle
stability.
Before Towing a Trailer
Before towing a trailer, you must do the
following:
• Inflate tires to the cold tire inflation
pressure specified in Tire Pressures when
Towing.
• Set Smart Air Suspension to Standard
height (touch Controls > Suspension >
Standard).
• Observe all regulations and legal
requirements in your state/region that
apply to trailer towing. Failure to comply
with regulations can compromise your
safety.
• Adjust side mirrors to provide a clear
rearward view without a significant blind
spot.
• Ensure that Trailer Mode is engaged.
Confirm the following:
• Model X rests horizontally with the trailer
attached. If the vehicle is tipped sharply
up at the front, and down at the rear,
check that you are not exceeding the
maximum towing capacity and tongue
loads provided in Carrying Capacity.
• All trailer hitch parts and attachments and
electrical connectors (including reverse
and fog lights, if equipped) are in good
condition and are properly connected. If
any problems are apparent, do not tow
the trailer.
• Trailer lights (brake lights, turn signal
lights, and marker lights) are working
properly.
• The trailer tongue is securely connected
to the hitch ball.
• All cargo is secured.
• The trailer load is evenly distributed such
that the trailer tongue weight is
approximately 4% of the total trailer
weight, without exceeding the maximum
tongue weights provided in Carrying
Capacity.
Warning:
The trailer tongue weight must
be approximately 4% of the total trailer
weight without exceeding the maximum
tongue weights provided in Carrying
Capacity. Loads that are balanced over
the wheels or heavier in the rear can
cause trailer sway, resulting in loss of
vehicle control.
Warning: Always ensure that cargo is
secured in the trailer and will not shift.
Dynamic load shifts can cause loss of
vehicle control, resulting in serious injury
or death.
Towing and Accessories
82 Model X Owner's Manual
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