The wheels on your vehicle were aligned and
balanced carefully at the factory to give you the
longest tire life and best overall performance.

If you notice unusual tire wear or your vehicle
pulling one way or the other, the alignment may
need to be reset. If you notice your vehicle vibrating
when driving on a smooth road, your wheels may
need to be rebalanced.

Find the sticker in the door for
proper tire inflation pressures.

Tire rotation is very important. Tires should be
rotated every 6,000 miles.
Every tire has several words that describe it's quality rating.
Learn what these
Tire Ratings Mean.
The tire size is a combination of letters and
numbers used to define a particular tire's width,
height, aspect ratio, construction type, and service
Learn what all those letters and numbers mean in
Tire Size Description.
One way to tell when it is time for new tires is to check the
tread wear indicators, which will appear when your tires
have only 1/16 inch (1.6 mm) or less of tread remaining.
Tires need to be properly inflated at all times. Dont let anyone tell
that a little less air pressure or a little more is OK and can give
some kinds of advantages over having the correct pressure. Here
are some examples of what
Improper Inflation
(over or under inflation) can do.
When it is time to get new tires, it is very important to get the
same style, type, and size as the original. This is even more
important with a 4 wheel drive, or all-wheel drive truck or SUV.
Learn More Here.
Everything You Need To Know About Tires

More Car Repair Help

Visitor: This is an argument I have with a friend. I have an
engineering degree. The tire pressure label gives average load
pressures if you are carrying extra weight. You need to increase the
pressure to get proper contact with the road.  At this time I can't
give you the reference book that is covered in. That in part is why
the tire pressure listed on the tires is different then the door tag. If
you place a pressure pad under the tire with max vehicle load (
such as a service truck that is never unloaded ) you will see more
load near the sidewalls less in center for best tire performance and
wear. The load needs to be consistent across the tread.

I have a 68 Dodge Charger with none spec tires ( wide ) on the rear
with the door label pressure in them. On a burn out the road mark
is only half the with of the tires. The low budget way I found to find
max performance pressure was try different tire pressure on burn
outs for my car and load 18.5 psi with the tires I was running gave
full contact.  This is a case for lower pressure. ( none average
usage ). One size fits all statements leave room for errors. A note
should be added. My friend I mentioned is a certified mechanic. I
am an engineer tech.

Look at Nascar if you don't believe me. They change the tire
pressure on the cars during the race for performance and wear it is
not one thing fits all.
Thank you for the insight.
The reason for a tire with proper pressure (from the car label) to
only contact half the road during a burn out can be related to Top
fuel dragsters. During acceleration the tire expands its
circumference ( it gets taller)due to centrifugal force. Thus, the tire
contact area is skinnier. The tire pressure label is a happy medium
for maximum contact, long tire life and fuel economy.

Visitor: I said Nascar where the tires are not spinning but for a drag
car you will see bald in center and tread on edges after much use.
If there is the narrow burn out ( with my 500hp charger) 18.5 psi
left full width black marks spinning or breaking. Note these were
none spec tires so spec pressure does not apply. The science is
important when you exceed standards. Take the vehicle weight per
tire and the surface area in contact with road. The pressure times
the surface area should equal the weight. Otherwise you are sitting
on the sidewalls breaking them down or the tire balloons up if over
pressure and you are only on the center of tire. Note you should not
exceed vehicle or tire max. These are just faint memories from my
college days long ago.