Wheel Alignment vs Tracking: What's the Difference?

Many drivers often find themselves pondering the distinctions between various automotive maintenance terms. Among the most frequently confused are wheel alignment and wheel tracking. While often used interchangeably, understanding their nuances can significantly impact your vehicle's performance, longevity, and your driving experience. This guide aims to demystify these concepts, explaining what each service entails, why it's important, and how you can identify when your vehicle might need attention.

Understanding Wheel Alignment

At its core, wheel alignment refers to the precise angles at which your vehicle's wheels are set in relation to the road surface and the vehicle itself. Think of it as the 'posture' of your wheels. These angles are meticulously set by manufacturers to ensure optimal handling, fuel efficiency, and even tyre wear. The key angles involved in wheel alignment are:

• Camber: This is the inward or outward tilt of the top of the tyre when viewed from the front of the vehicle. If the top of the tyre tilts inwards, it's negative camber; if it tilts outwards, it's positive camber. Correct camber ensures the tyre treads make full contact with the road.
• Caster: This refers to the angle of the steering axis in relation to the front of the vehicle when viewed from the side. Positive caster helps to improve steering stability and makes the steering wheel return to centre after a turn.
• Toe: This is the direction in which the wheels are pointing. If the front edges of the tyres are closer together than the rear edges, it's 'toe-in'. If the front edges are further apart, it's 'toe-out'. Correct toe settings are crucial for straight-line stability and preventing tyre scrub.

Why is Wheel Alignment Crucial?

When your wheels are correctly aligned, you benefit from:

• Improved Handling: A properly aligned vehicle will steer straight and true, without pulling to one side.
• Reduced Tyre Wear: Misalignment causes tyres to drag or scrub against the road, leading to uneven and premature wear. This can significantly shorten the lifespan of your tyres.
• Enhanced Fuel Efficiency: When tyres aren't fighting against each other due to misalignment, your engine doesn't have to work as hard, leading to better miles per gallon.
• Smoother, Safer Drive: Correct alignment contributes to a more stable and predictable driving experience, especially at higher speeds or during braking.

Signs Your Vehicle Needs an Alignment Check

Several tell-tale signs indicate that your vehicle's wheel alignment might be out of sync:

• Drifting: If your car consistently pulls to the left or right when driving on a straight, level road.
• Uneven Tyre Wear: Noticing abnormal wear patterns on your tyres, such as feathering, cupping, or excessive wear on one edge.
• Crooked Steering Wheel: The steering wheel is off-centre when you are driving in a straight line.
• Loose or Wandering Steering: The steering feels vague or the car wanders across the road.
• Squealing Tyres: Tyres may squeal when cornering due to incorrect angles.

What Causes Misalignment?

The most common culprits for misalignment are:

• Impacts: Hitting potholes, kerbs, or debris on the road can easily knock your wheels out of their precise alignment settings.
• Wear and Tear: Over time, suspension and steering components can wear, leading to subtle changes in alignment angles.
• Accidents: Even minor collisions can affect wheel alignment.

The Wheel Alignment Process

A professional wheel alignment involves using specialised equipment, often incorporating laser and computerised alignment systems. The vehicle is placed on a level platform, and sensors are attached to each wheel. These sensors measure the current angles of the wheels. The technician then compares these readings to the manufacturer's specifications and makes precise adjustments to the suspension and steering components to bring the wheels back into the correct alignment. This process ensures everything is running 'straight and true'.

What About Wheel Tracking?

Now, let's address the term wheel tracking. In the context of automotive maintenance, particularly within the UK, tracking is essentially synonymous with wheel alignment. It refers to the same principle: ensuring that the wheels are pointing in the correct direction relative to each other and the road. So, when a mechanic talks about 'tracking', they are referring to the alignment of the wheels, specifically the toe settings.

The term 'tracking' often arises from the idea of the wheels 'tracking' correctly in a straight line. If one or more wheels are not pointing straight ahead, they are not 'tracking' properly, leading to drag and uneven wear. Therefore, a 'wheel tracking check' is the same as a 'wheel alignment check', and the process for correction is identical.

The Distinction: Alignment vs. Tracking

To be perfectly clear: there is no fundamental difference between wheel alignment and wheel tracking. They are two terms used to describe the same service and the same set of angles that govern how your wheels interact with the road. If you hear one term, it's highly probable the service required is the adjustment of camber, caster, and toe angles.

Understanding Wheel Balancing

While alignment and tracking deal with the angles of the wheels, wheel balancing addresses a different, though equally important, aspect of your wheels' health: the even distribution of weight. When a tyre is manufactured and fitted to a wheel rim, there can be slight variations in weight distribution. Even a small imbalance can become very noticeable when the wheel rotates at speed.

Why is Wheel Balancing Important?

Unbalanced wheels can lead to:

• Vibrations: The most common symptom is a vibration felt through the steering wheel, the seat, or the entire car, especially at certain speeds (often between 50-70 mph).
• Uneven Tyre Wear: Vibrations can cause tyres to bounce rather than roll smoothly, leading to cupping or scalloping on the tyre tread.
• Premature Wear of Components: These vibrations can also put extra stress on your car's suspension, steering components, and even wheel bearings, leading to premature wear and potential failure.
• Uncomfortable Ride: The vibrations make for a less comfortable and more fatiguing driving experience.

How are Wheels Balanced?

Wheel balancing is a precise process performed using a specialised balancing machine. Here's how it typically works:

1. Removal: The wheel is removed from the vehicle.
2. Mounting: It's then mounted onto a balancing machine.
3. Spinning: The machine spins the wheel at high speed, simulating road conditions.
4. Detection: Sophisticated sensors detect any imbalances in the weight distribution around the wheel.
5. Correction: The machine indicates the exact location and weight needed to counteract the imbalance. Small, adhesive or clip-on weights are attached to the rim at these specific points.
6. Re-check: The wheel is spun again to ensure the balance is now perfect.

When Should You Get Your Wheels Balanced?

It's recommended to have your wheels balanced:

• Whenever new tyres are fitted.
• Whenever a tyre is repaired.
• If you notice any of the symptoms mentioned above (vibrations, uneven wear).
• As part of regular vehicle maintenance, perhaps annually or every 10,000 miles, depending on your driving habits.

Comparison Table: Alignment vs. Balancing

To summarise the key differences and similarities:

Frequently Asked Questions

Q1: If my steering wheel is crooked, is it alignment or balancing?

A crooked steering wheel is a classic symptom of misaligned wheels, not unbalanced ones. Balancing issues typically manifest as vibrations.

Q2: How often should I get my alignment and balancing checked?

It's wise to have both checked annually or every 10,000 miles as a preventative measure. However, if you notice any symptoms like pulling, vibrations, or uneven tyre wear, get them checked immediately.

Q3: Can I do wheel alignment or balancing myself?

While some basic checks can be done at home, professional alignment and balancing require specialised equipment and expertise. It's best left to qualified mechanics to ensure precision and safety.

Q4: Does hitting a pothole always affect my alignment?

Not necessarily, but it significantly increases the risk. The severity of the impact and the speed at which you hit it play a role. If you hit a pothole hard, it's a good idea to have your alignment checked.

Q5: If my tyres are worn unevenly, does that mean I need alignment or balancing?

Uneven tyre wear is a strong indicator of misalignment. While severe vibrations from unbalanced wheels can also cause some unevenness, the patterns are usually different. Edge wear or feathering points towards alignment issues.

In conclusion, while 'alignment' and 'tracking' are two sides of the same coin, referring to the angles of your wheels, 'balancing' deals with the distribution of weight. Both services are vital for a safe, comfortable, and economical driving experience. Regular checks and prompt attention to any symptoms will help keep your vehicle in optimal condition and ensure your tyres deliver their maximum lifespan. Don't overlook these crucial maintenance tasks – your car (and your wallet) will thank you for it!