Tires 9-16 Vehicle care and maintenance
9
under controlled conditions on speci- fied government test surfaces of asphalt and concrete. A tire marked C may have poor traction perfor- mance. The temperature grades are A (the highest), B and C, representing the tire’s resistance to the generation ofheat and its ability to dissipate heat when tested under controlled condi- tions on a specified indoor laboratorytest wheel. Sustained high tempera- ture can cause the material of the tire to degenerate and reduce tire life, andexcessive temperature can lead to sudden tire failure. The grade C cor- responds to a level of performancewhich all passenger car tires must meet under the Federal Motor Vehi- cle Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory testwheel than the minimum required by law.
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Proper tire inflation pressure is essential for the safe and satisfactory operation of yourvehicle. The wrong tire pressure will cause problems in three major areas: Safety Too little pressure increases flexing in thetire and can cause tire failure. Too muchpressure can cause a tire to lose its ability to cushion shock. Objects on the road and potholes could then cause tire damage thatmay result in tire failure. Economy The wrong tire pressure can cause unevenwear patterns in the tire tread. These abnormal wear patterns will reduce the tread life, and the tire will have to bereplaced sooner. Too little pressure also makes it harder for the tire to roll, and this uses up more fuel. Ride comfort and vehicle stability The superior riding experience built into your vehicle partly depends on the correcttire pressure. Too much pressure gives an uncomfortable and jarring ride. Too little pressure feels as if your vehicle is slow torespond. Unequal tire pressures can make steering your vehicle uneven and unpredictable.
The correct tire pressure for your vehicle is listed on the placard attached to the driver’s door sill. (Refer to “Tire and loading information plac-ard” on page 11-3.) The recommended inflation pressures should be used for the tires listed below. Tire pressures should be checked, and adjusted if necessary, at least once a month. Pressures should be checked more oftenwhenever weather temperatures change severely, because tire pressures change with outdoor temperatures. The pressures listed onthe placard are always “cold inflation pres- sure”. Cold inflation pressure is measured after thevehicle has been parked for at least three hours or is driven less than 1 mile (1.6 km) after having been parked for three hours.Cold inflation pressure must not go above the maximum values molded into the tire side- wall. After driving several miles, your tireinflation pressure may increase 14 to 41 KPA,
Temperature
Tire inflation pressures
Item
Tire size
Front
Rear
Normal tire 245/40R18
220 KPA, 32 PSI
220 KPA, 32 PSI
Compact spare tire
T145/70R1
8
420 KPA, 60
PSI
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Tires 9-18 Vehicle care and maintenance
9
These indicators are molded into the bottom of the tread grooves and will appear when the tire tread is worn down to 1/16 inch (1.6 mm).When the bands appear next to one another in two or more places, replace your tires.
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To even out the wear on your tires and makethem last longer, Mitsubishi Motors Corpora- tion recommends that you rotate your tires atthe mileage listed in the “WARRANTY AND MAINTENANCE MANUAL”. However, the timing for tire rotation mayvary according to your vehicle condition, road surface conditions, and your own per- sonal driving habits. Any time you noticeunusual wear, rotate your tires as soon as pos- sible. When rotating tires, check for uneven wear, damage, and wheel alignment. Abnormalwear is usually caused by a wrong tire pres- sure, wheels that are not aligned properly,
wheels that are out-of-balance, or severe braking. Check with an authorized Mitsubishi Motors dealer or a repair facility of your choice tofind out the reason for uneven tread wear. The first tire rotation is the most important one. It will allow all your
tires to wear evenly.
NOTE
Tire wear indicators can have different marks and locations depending on the tire manufac- turer.
Tire rotation
CAUTION A compact spare tire can be installed tempo- rarily in place of a tire that has been removedduring the tire rotation. However, it must not be included in the regular tire rotation sequence.Tires that do not have
arrows showing rotation
direction Front Tires that have arrows showing rotation direction Front
CAUTION If the tires have arrows (A) indicating the correct direction of rotation, swap the front and rear tires on the left-hand side of the vehicle and the front and rear tires on the right-hand side of the vehicle separately.Keep each tire on its original side of the vehicle. When installing the tires, make sure the arrows point in the direction in which thewheels will turn when the vehicle moves for- ward. Any tire whose
arrow points in the
wrong direction will not perform to its fullpotential.CAUTION Avoid the combined use of different types of tires. Using different types of tires can affectvehicle performance and safety.
Front
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