Abnormal or Excessive Tire Wear. Pontiac Sun Runner - 4WD (Canada) 1998

For 1990-2009 cars

Table 1: | The Tires Are Scuffed
Table 2: | The Tires Are Cupped

Checks | Causes
--- | ---
Wheels | Improper alignment

Tires

• | Excessive toe

• | Balance

• | Improper inflation

Springs

• | Sags

• | Breaks

Strut

• | Wear

• | Damage

Shock Absorbers

• | Wear

• | Damage

Vehicle

• | Abuse

• | Uneven or excessive loading

#### The Tires Are Scuffed

Checks | Causes
--- | ---
Wheels | Improper alignment
Vehicle | Abuse

Suspension Arm

• | Damage

• | Deformation

#### The Tires Are Cupped

Checks | Causes
--- | ---
Wheels | Incorrect alignment

Strut

• | Wear

• | Damage

Shock Absorbers

• | Wear

• | Damage

Wheel Bearings

• | Wear

• | Damage

Tire and Wheel

• | Wear

• | Damage

Ball Studs

• | Wear

• | Damage

Steering Gear | Incorrect adjustment