Irregular And Premature Wear; Tire Rotation; Tread Wear Indicators; Diagnosis - Isuzu Trooper 1999 Workshop Manual

Diagnosis

Irregular and Premature Wear

Irregular and/or premature wear has many causes.
Some of them are incorrect inflation pressures, lack of tire
rotation, poor driving habits or improper wheel alignment.
Incorrect inflation is common cause of tire premature
wear.
NOTE: Due to their design, radial tires tend to wear faster
in the shoulder area, particularly on the front tires. This
makes regular rotation especially necessary. After
rotation, be sure to check wheel nut torque, and set tire
pressures.

Tire Rotation

Tire rotation is recommended to equalize wear for longer
tire life.
Legend
(1) Spare Tire
WHEEL AND TIRE SYSTEM
If the following conditions are noted, rotate the tires:
f Front tire wear is different from rear.
f Uneven wear exists across the tread of any tire.
f Left and right front tire wear is unequal.
f Left and right rear tire wear is unequal.
Check wheel alignment if the following conditions are
noted:
f Left and right front tire wear is unequal.
f Wear is uneven across the tread of any front tire.
f Front tire treads have a scuffed appearance with
"feather" edges on one side of the tread ribs or blocks.

Tread Wear Indicators

The original equipment tires have built-in tread wear
480RS002
indicators(1) to show when tires need replacement.
These indicators may appear as wide bands. When the
indicators appear in two or more grooves at three
locations, tire replacement is recommended.
3E–3
480RS001
480RS006