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WHY IS TIRE ROTATION IMPORTANT?

It’s a known fact that regular tire rotation extends the life of your tires and improves performance. Tires are rotated to achieve a uniform wear for all tires. Each tire performs different tasks (such as steering in front- versus rear-wheel drive), therefore tires wear at different rates. Tires should be rotated every 7,500 miles to prevent irregular tire wear.

 

It’s important to rotate your tires according to the correct tire-rotation pattern. Doing so will prolong the life of your tires and will reduce the risk of sudden tire failure. Front tires encounter different tasks than the rear tires. And a front-wheel-drive car’s tires perform different tasks than those on a rear-wheel-drive car. See the Maintenance Schedule section in your Owner’s Manual for additional information about your specific vehicle.

 

TIRE ROTATION PATTERNS

Front Wheel

Pattern for front-wheel drive with same size front and rear nondirectional tires.

All-Wheel/4-Wheel/Rear-Wheel

Pattern for all-wheel/4-wheel/rear-wheel drive vehicles with same size front and rear
nondirectional tires.

Different Size Tires

Pattern for different size tires on the front and rear and nondirectional tires.

Buick Tire Rotation Pattern: Front Wheel Drive Vehicles
Buick Tire Rotation Pattern: All-Wheel, 4-Wheel and Rear Wheel Drive Vehicles
Buick Tire Rotation Pattern: Vehicles With Different Size Tires

If your vehicle has a Tire Pressure Monitoring System, it will need to be reset after each tire rotation. See your Owner’s Manual for details.
Or, read more about tire pressure.

WHY IS WHEEL ALIGNMENT IMPORTANT?

Proper wheel alignment is key to prolonging the life of your tires. If your vehicle is misaligned, it can cause your tires to wear unevenly, and you may experience handling problems such as pulling or abnormal vibration.

 

Tires and wheels are aligned and balanced at the factory to provide the longest life and best overall performance. Adjustments to wheel alignment and tire balancing are not necessary on a regular basis. Consider a wheel alignment check if there is unusual tire wear or the vehicle is significantly pulling to one side or the other.

 

A tire that is out of balance often affects ride quality and can shorten the life of tires, bearings, shocks, and other suspension components. If the vehicle is vibrating when driving on a smooth road, the tires and wheels may need to be rebalanced.

WHAT IS CAMBER?

Camber is the tilting of the wheels from the vertical when viewed from the front of the vehicle. When the wheels tilt outward at the top, the camber is positive. When the wheels tilt inward at the top, the camber is negative. The amount of tilt is measured in degrees from the vertical. Camber settings influence the directional control and the tire wear.

How does camber affect wheel alignment?


• Too much positive camber will result in premature tire wear on the outside of the tire and cause excessive wear on the suspension parts.

• Too much negative camber will result in premature tire wear on the inside of the tire and cause excessive wear on the suspension parts.

• Unequal side-to-side camber of 1 degree or more will cause the vehicle to pull or lead to the side with the most positive camber.

WHAT IS CASTER?

Caster is the tilting of the uppermost point of the steering axis either forward or backward, when viewed from the side of the vehicle. A backward tilt is positive and a forward tilt is negative. Caster influences directional control of the steering but does not affect tire wear. Caster is affected by the vehicle height, therefore it is important to keep the body at its designed height. Overloading the vehicle or a weak or sagging rear spring will affect caster. When the rear of the vehicle is lower than its designated trim height, the front suspension moves to a more positive caster. If the rear of the vehicle is higher than its designated trim height, the front suspension moves to a less positive caster.

How does caster affect wheel alignment?


• With too little positive caster, steering may be touchy at high speeds and wheel returnability may be diminished when coming out of a turn.

• If one wheel has more positive caster than the other, that wheel will pull toward the center of the vehicle. This condition will cause the vehicle to pull or lead to the side with the least amount of positive caster.

 

Always visit a Certified Service expert technician if you experience any of these situations. Check your Owner’s Manual for more information about wheel alignment and tire balance on your specific vehicle.

Buick Camber Diagram