Wheel Alignment

At Selecta Tyre Ltd we use sophisticated wheel balancing systems ranging from laser wheel alignment to full 3D imaging equipment. We also offer Caster and Camber adjustments at some locations.

Contact your local branch for comprehensive advice, or simply call in for a FREE Check!

Wheel Alignment Service

For the correct vehicle handling, even tyre wear, safest stopping distances, increased fuel economy, less driver fatigue, while also maximising your investment in your tyre purchase. The correct wheel alignment settings for your car should be set.

Surveys carried out have found that more than eight out of every ten cars checked required a wheel alignment adjustment. How will you know if you have a potential wheel alignment issue?

First thing is a visual check on a regular basis. See the illustrations below

Wheel Alignment Feathered Toe Angle
Wheel Alignment Camber Angle

The other questions you need to ask yourself are as follows;

  1. Is your steering wheel straight when you drive your car?
  2. Does your car pull or drift to the left or right?
  3. Are you experiencing uneven tyre wear?
  4. Does your car understeer or oversteer?
  5. Do the tyres squeal on roundabouts?
  6. Does your car wander when driving in a straight line?

If you have any of these symptoms you could have a problem that can be addressed with a four wheel alignment check.

Driver Fatigue

Looking at the illustration below, if a car is constantly trying to pull left or right the driver has to correct this pull all the time. This will over time have an effect on their concentration. Over long journeys this could lead to motoring mistakes and errors.

Driver Fatigue

Fuel Consumption

Wheel alignment settings are designed in to the vehicle geometry to give the most comfortable ride with the optimum road handling. This achieves the lowest rolling resistance for the tyres. With the correct wheel alignment for your vehicle you will achieve the best fuel consumption figures.

Tyres

The cost of tyres is a constant investment for the motorist. Most people do not understand that the modern tyre is a very technical and integral part of the vehicle. For the tyre to work to its full design potential, the correct alignment settings for the vehicle must be used. If used you will get the maximum life from your tyres.

Understeer / Oversteer

These words are used a lot by motoring journalists. It all sounds very technical, but most of us do not understand what this actually means. Understeer is when the car does not turn enough and has the affect of wanting to go straight on. Over steer is the opposite when the car turns tighter than intended, this can lead to cars spinning. Both of these conditions are a symptom of miss alignment. See the illustrations below.

Understeer/Oversteer

Wheel Alignment Angles

The wheel alignment angles all have an important role to play in the performance of the motor vehicle. Below the five most important angles are explained.

Front Toe

Front toe sometimes referred to as "Tracking", relates to the way the actual width of the track varies from the front to the rear of the front wheels (see below). As viewed from above the front road wheels will be either pointing towards the centre line of the vehicle or away from it. If the wheels are pointing away from the centre line this is referred to as Toe Out (also called Negative Toe). If the wheels point towards the centre line it is called Toe In (also called Positive Toe).

These settings are built into the steering geometry to reduce the tyre wear to a minimum and counteract the tensions built up by the geometry angles. If these angles are not set equally to the centre line this will be shown up as the steering wheel not being straight.

Front Toe

Rear Toe

Again the rear toe on a vehicle is set to give minimum tyre wear. It is also used to assist straight line stability. Wheels need to be set equal on both sides of the vehicle, otherwise a thrust angle is introduced. The effect of this will be uneven tyre wear and the steering wheel will not be straight. See below.

Rear Toe

Thrust Line

Thrust Line, also referred to as Thrust Line, is the angle of the centre line in relation to the rear axle or the theoretical rear axle. If this angle is 90 degrees it will affect the relationship between the front and rear wheels. The car will drift either left or right, again indicated by the steering wheel position See below.

Thrust Line

Camber

Camber is the angle of the road wheel measured vertically. Negative camber is when the top of the wheel is leaning into to the vehicle (see below). Positive camber is when the top of the road wheel is leaning away from the vehicle. This angle is set to assist the vehicle when cornering as well as assisting straight line stability. The camber angles must be equal either side of the vehicle. If not the vehicle will pull of drift either left or right. If the camber is not set correctly the tyres will show wear on just one side. Too much negative camber will wear the inside edge of the tyre, too much positive camber will wear the outside edge of the tyre.

Camber

Castor

Castor angle in a car simulates the angle of the forks on a push bike. It is designed to give the vehicle straight line stability. This angle is only adjustable in a few vehicles. This angle is often over looked on a problem vehicle. The cause of castor problems is usually accident damage. Both castor angles do not need to be the same as the effects of the road. Camber can influence the vehicle drifting left or right. In the UK, cars are often set with the left castor slightly higher than the right to compensate for the road camber. See below.

Castor