12/04/2016
It’s a common scenario: you’ve just had some work done on your car, perhaps new tyres fitted or suspension components replaced, and now your steering wheel isn’t quite straight when you’re driving in a straight line. Or perhaps you’ve noticed your tyres wearing unevenly, or your car subtly pulls to one side. These issues often lead car owners to seek "tracking" or "wheel alignment." While these terms are frequently used interchangeably, there’s a crucial distinction, particularly when it comes to the position of your steering wheel. Understanding this difference is key to ensuring your vehicle handles safely, efficiently, and comfortably.
At its core, tracking refers specifically to the "toe" angles of your wheels. Toe is the measurement of how much your wheels turn inward or outward when viewed from above. Think of it like looking down at your feet: if your toes point slightly inward, that’s toe-in; if they point slightly outward, that’s toe-out. Correct toe settings are vital for tyre wear and straight-line stability. However, tracking is just one piece of a much larger puzzle known as full wheel alignment.
Full wheel alignment is a comprehensive process that examines all the critical angles of your wheels and suspension. Beyond toe, it includes camber and castor. Camber is the inward or outward tilt of the wheel when viewed from the front of the car. If the top of the wheel tilts outward, it’s positive camber; inward is negative camber. Incorrect camber can lead to significant uneven tyre wear and affect handling during cornering. Castor, on the other hand, is the angle of the steering pivot when viewed from the side of the car. It’s responsible for steering stability, straight-line tracking, and the self-centring action of the steering wheel after a turn. Without proper castor, your steering can feel vague, heavy, or fail to return to the centre naturally.
The issue of whether your steering wheel is "straight" or off-centre is fascinatingly separate yet intrinsically linked to wheel alignment. It's entirely possible for your vehicle to have 100% correct wheel alignment—meaning all the toe, camber, and castor angles are within manufacturer specifications—and yet your steering wheel sits crookedly. How does this happen? The most common reason is during the alignment process itself. A good technician will always lock the steering wheel in a perfectly centred position before performing any adjustments. If this crucial step is overlooked, or if the wheel isn't locked precisely, the technician might adjust the tie rods (which control toe) to achieve correct wheel alignment relative to the chassis, but the steering wheel's physical position will be off-centre. So, while your wheels might be perfectly aligned, your steering wheel might be pointing at one o’clock when you’re driving straight ahead. This doesn't necessarily mean your car is unsafe, but it is certainly annoying and can be misleading, making you feel as though something is still wrong.
Why does a crooked steering wheel or improper alignment matter? The implications extend far beyond mere aesthetics or personal preference.
Safety and Handling: A misaligned vehicle can pull to one side, making it harder to maintain a straight path, especially at higher speeds or in adverse weather conditions. This constant correction can be tiring for the driver and increases the risk of an accident. Furthermore, cornering and emergency manoeuvres can be unpredictable and less responsive.
Tyre Wear: This is one of the most visible symptoms of misalignment. When wheels aren't pointing precisely where they should, tyres drag or scrub across the road surface, leading to rapid and uneven wear. This not only shortens the lifespan of expensive tyres but can also compromise their grip, particularly in wet conditions. You might notice feathering, one-sided wear, or bald spots.
Fuel Efficiency: While subtle, misalignment increases rolling resistance, meaning your engine has to work harder to propel the vehicle. Over time, this can lead to a noticeable decrease in fuel economy, costing you more at the pumps.
Component Longevity: Constant stress from misaligned wheels can prematurely wear out steering and suspension components, such as ball joints, tie rod ends, and shock absorbers. This translates to more frequent and costly repairs down the line.
Comfort: A vehicle that constantly pulls or vibrates due to misalignment makes for an uncomfortable driving experience, particularly on long journeys.
Recognising the symptoms of misalignment or an off-centre steering wheel is the first step towards rectifying the issue. Keep an eye out for:
- Your vehicle consistently pulling or drifting to one side when driving on a flat, straight road.
- The steering wheel being off-centre when you are driving straight.
- Uneven or excessive tyre wear on one side of the tyre or across the tread.
- A loose or "wandering" feeling in the steering.
- Vibrations through the steering wheel or the vehicle itself, especially at certain speeds.
- Squealing tyres, particularly when turning.
Several factors can knock your vehicle's alignment out of whack. The most common culprits include:
- Potholes and Kerb Impacts: Hitting a deep pothole or clipping a kerb can instantly alter suspension angles.
- Minor Accidents: Even a minor bump can shift alignment settings.
- Worn Suspension Components: Worn ball joints, bushes, or tie rod ends can lead to play in the steering and suspension, causing the wheels to move out of alignment.
- Routine Wear and Tear: Over time, components naturally wear, leading to subtle changes in alignment.
- Suspension Modifications or Repairs: Anytime suspension or steering components are replaced or adjusted, a wheel alignment should always follow. This is crucial as new parts can have slightly different tolerances or may have been installed in a way that affects the angles.
Given the complexities and the precision required, wheel alignment is not a job for the DIY enthusiast. It requires specialised equipment and trained technicians. A proper four-wheel alignment typically involves:
- Preparation: The vehicle is placed on a level alignment rack. The tyres are checked for proper inflation, and worn suspension components are identified and, if necessary, replaced first.
- Sensor Attachment: Precision sensors are attached to each wheel. These sensors communicate with a computer system.
- Measurement: The computer measures the current toe, camber, and castor angles for all four wheels and compares them to the manufacturer's specifications for that specific make and model.
- Adjustment: The technician then makes precise adjustments to the suspension components, primarily the tie rods for toe, and sometimes camber bolts or shims for camber and castor (depending on the vehicle's suspension design). Crucially, during this process, the steering wheel must be held perfectly straight using a locking device.
- Verification: After adjustments, the system re-measures the angles to ensure they are all within specification. A printout is often provided, showing the "before" and "after" readings.
It's important to distinguish between a simple "tracking" check and a full four-wheel alignment. Many garages offer a quick "tracking" service, which often only adjusts the front toe. While this can resolve some issues, it completely ignores the rear wheels and other critical angles like camber and castor, which significantly impact handling and tyre wear. Even if your car is front-wheel drive, the rear wheel alignment plays a vital role in how the vehicle tracks and handles. A comprehensive four-wheel alignment is always the superior choice, as it addresses all variables for optimal performance and longevity.
To illustrate the difference, consider the following:
| Feature | "Tracking" (Front Toe Adjustment) | Full Four-Wheel Alignment |
|---|---|---|
| Angles Measured/Adjusted | Primarily front wheel toe | Front and rear toe, camber, and castor |
| Wheels Involved | Front wheels only | All four wheels |
| Cost | Generally lower | Higher, reflecting the comprehensive service |
| Effectiveness | May solve minor straight-line pull; limited benefit for overall handling/tyre wear | Optimises handling, maximises tyre life, improves fuel efficiency, ensures straight steering wheel |
| Steering Wheel Centring | Possible to still have an off-centre steering wheel if not explicitly addressed | Ensured by locking the steering wheel during the process |
Frequently Asked Questions
How often should I get my wheel alignment checked?
It's generally recommended to have your wheel alignment checked annually or every 10,000-12,000 miles, whichever comes first. You should also get it checked after hitting a significant pothole or kerb, after any suspension or steering component replacement, or if you notice any of the symptoms of misalignment.
What's the difference between 2-wheel and 4-wheel alignment?
A 2-wheel alignment typically only adjusts the front wheels, primarily the toe. A 4-wheel alignment, which is the gold standard, measures and adjusts all four wheels, taking into account how the front and rear wheels interact. Even if your car is front-wheel drive, the rear wheels can affect the vehicle's overall thrust line and handling, making 4-wheel alignment crucial.
Can I drive with a crooked steering wheel?
While a crooked steering wheel might not immediately mean your car is unsafe (especially if the underlying wheel alignment is correct), it's a strong indicator that something isn't right. It can be annoying, distracting, and might mask underlying alignment issues that could lead to uneven tyre wear or compromised handling over time. It's always best to have it rectified.
How much does a wheel alignment cost?
The cost can vary significantly depending on your location, the type of vehicle, and the garage. A basic front-wheel tracking check might be £30-£50, whereas a full four-wheel alignment with a reputable specialist using advanced equipment could range from £70-£150 or more. Always consider the value provided by a comprehensive service over a cheaper, less thorough option.
Does fitting new tyres require wheel alignment?
It's highly recommended. While not strictly necessary for every tyre change, new tyres will highlight any existing alignment issues, as they haven't been worn down to compensate for them. Getting an alignment after new tyres are fitted ensures you get the maximum lifespan and performance from your investment.
In conclusion, while the term "tracking" is often used broadly, it's essential to understand that it’s just one aspect of the much more comprehensive wheel alignment process. A straight steering wheel is a direct result of a properly executed alignment, where the technician ensures it is locked in the centre before making adjustments. Opting for a full four-wheel alignment from a reputable garage is almost always the best course of action. It protects your investment in tyres, enhances your vehicle's safety and handling characteristics, improves fuel efficiency, and ultimately provides a more comfortable and confident driving experience. Don't settle for anything less when it comes to the precision and safety of your vehicle.
If you want to read more articles similar to Is Your Steering Wheel Straight? The Truth About Alignment, you can visit the Alignment category.