8. Tire Replacement
The tires fitted to your vehicle as original equipment were tested and
approved by the vehicle manufacturer and the tire manufacturer and take
into account all aspects of the vehicle’s operation. Changes in the tire size,
type or construction should not be made without seeking advice from the
vehicle or tire manufacturer or an authorized Pirelli dealer since unap-
proved tires on your vehicle could adversely affect steering, handling,
braking and traction. The tire information (tire size, load index and speed
symbol) as found on the vehicle placard or in the owner ’s manual should
always be followed when replacing tires.
It is strongly recommended that Pirelli tires be mounted in sets of four
with the same tread type. Pirelli tires should not be mixed with other tire
brands. It is necessary to follow this procedure because different tire
constructions have different handling characteristics. Tires on the same
axle must be the same manufacturer, brand, tire size, load index, speed
rating and Pirelli part number.
When changing only two tires on a vehicle which is homogeneously
fitted (four tires of the same tire size), fit the new tires on the rear axle.
This applies to all vehicles regardless of their drive axle. (Front or Rear
Drive).
On all wheel drive or four wheel drive vehicles the tires must always be
replaced in sets of four.
When replacing tires on light truck vehicles, you should always follow
the vehicle manufacturer ’s recommendations. Passenger and light truck
tires are not interchangeable, due to differences in their pressures and
load carrying capacity.
P-Metric and Euro-metric Interchangeability: Euro-metric (Example: 225/
45R17) tires have a load index which is equal to or greater than that of the
same size P-metric (Example: P225/45R17) tire. Therefore, they have the
same or higher load carrying capacity at the maximum rated inflation
pressure. Always check with your tire dealer or Pirelli Tire Consumer
Affairs to be sure of the exact interchangeability to maintain proper
vehicle dynamics.
Please be aware that it is important that, before fitting the suggested tires,
the fitment is allowed by the technical specifications of the vehicle, the
vehicle manufacturer and the relevant homologations. Pirelli Tire does
not express any view as to the compatibility of the wheel/tire combina-
tion with the technical specifications for the chassis and vehicle.
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WARNING!(Continued)
Pull over to a safe area as soon as possible and inspect the tires for
signs of bulges, blisters, or separations. Seek roadside assistance or
change the damaged tire with your spare tire.
If you experience a blowout or a sudden tire failure, the following
information should be helpful:
• When the tire failure occurs, you may hear a loud noise, or feel a
vibration, and/or the vehicle may pull toward the side of the failed
tire. Do not abruptly brake or turn.
• Maintain steady pressure on the accelerator pedal.
• Hold the steering wheel firmly and steer to maintain your lane
position.
• Find a safe place to pull off the road and allow the vehicle to gradually
decelerate. Apply light braking as required to stop safely.
• Gradually pull over to the shoulder and come to a stop. Look for a
damaged tire on your vehicle.
• Seek roadside assistance or change the damaged tire with your spare
tire.
• Have all of your tires and the vehicle thoroughly inspected by a tire
professional.
TIRE ROTATION
The purpose for rotating tires is to achieve more uniform wear for all tires
on a vehicle. Your tires should be thoroughly examined on a lift by a tire
dealer for any abnormalities. If tires show uneven treadwear, ask the
service person to check and/or correct any vehicle wheel alignment or
other mechanical problem before rotation.
The following rotation patterns are acceptable. Please refer to your
vehicle Owner ’s Manual for rotation advice.
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