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What is Wheel Alignment?

By R. Kayne
Updated May 23, 2024
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Wheel alignment is an adjustment an auto shop can make on a vehicle to ensure the tires are calibrated to point straight ahead. Proper alignment makes a vehicle steer easily and allows tires to wear evenly. When wheels are not aligned, various problems can result.

Tires can be nudged out of alignment by accidentally hitting them against objects such as curbs and parking blocks, or by catching a center cement divider while making a miscalculated turn. Once a tire is out of alignment, its orientation on the vehicle is slightly off-center. The degree of misalignment is not obvious to the human eye, but the effects will be noticeable.

There are telltale signs of a vehicle in need of an alignment. The tire that is pointing off-center will pull the vehicle in the direction it is oriented. For example, if the right front tire is nudged slightly inward (left), the steering wheel will pull left while driving on a flat, even surface. The driver will have to maintain a right-pull on the steering wheel to keep the vehicle headed straight — even when driving on a flat, straight road. This is not only annoying, but the tire that is out of alignment will also wear prematurely and unevenly because of the constant drag placed on its tread. The drag can also decrease the car's mileage.

Uneven tread wear is a sign that the car was driven quite a while with improper wheel alignment. Often, the inner tire tread will wear down smooth while there is still plenty of outer tread left, or visa-versa. The result is that tires have to be replaced sooner. If tread wear is "cupped," the vehicle was driven with the tires out of balance as well.

Having the wheels aligned normally takes less than one hour. The vehicle is placed on a platform, which allows the wheels to spin while a computer calculates their orientation. The computer compares this to a database of manufacturer specifications for the year, make and model of the car. If the alignment is off, an adjustment is made and the vehicle is tested again. Balancing can be done at the same time, if required.

The price of a wheel alignment commonly includes rotating the tires, which also helps them to wear evenly. Four-wheel drive vehicles might require all four tires to be aligned, though often only the front tires needs it. If a vehicle is four-wheel drive with oversized tires and a lift kit, this should be mentioned to the shop when the owner asks for a quote since not all shops can accommodate vehicles with lift kits and oversized tires. The owner will also want to ask if the shop will be aligning all four wheels or just the front tires.

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Discussion Comments
By anon1002262 — On Oct 10, 2019

I just got a wheel alignment and they showed me the results. Two of the tires show just over 1 degree off on the chamber; both left tires. Is this considered within spec., or should I raise the issue with the dealership that did the work?

By anon353386 — On Oct 30, 2013

While driving last night, my front passenger tire went flat. When I changed it, I noticed that it appeared to be sliced from the inside. What could this be?

By jed — On Dec 07, 2009

I got charged fo a four wheel alignment on a rwd 2007 charger. I thought four wheel alignment was for front wheel drives. was i taken in?

By caradvise — On Jul 27, 2009

Will the vehicle pulling on front wheel cause the steering wheel to pull left while driving on the flat surface? will that result in the breaking distance of the car while keeping left during the rainy day from slipping forward to bang or knock on the car in front during an emergency or suddenly jamming on the brakes?

By anon1109 — On May 15, 2007

My friend owns a 2006 dodge charger and was told that the rear tires wore to the metal in 6 weeks because the rear was out of alignment. Is this possible?

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