What Wheel Alignment Actually Means
Wheel alignment refers to the angular orientation of your vehicle's wheels relative to each other and to the vehicle's centreline. The main angles checked are toe — whether the fronts of the wheels point inward or outward relative to each other — camber, the vertical tilt of the wheel, and caster, the angle of the steering axis when viewed from the side. Each of these angles has a manufacturer-specified range that optimises tyre wear and handling.
When these angles fall outside specification, the tyres are forced to roll at a slight angle relative to their direction of travel. This causes the rubber to scrub continuously against the road rather than rolling cleanly, which is both wasteful and damaging.
The Real Cost of Driving on Misaligned Wheels
Misaligned wheels can reduce tyre life by 25% or more, depending on the severity of the misalignment. On a set of mid-range tyres costing £300, that represents a cost of £75 in unnecessary premature wear. Across several tyre changes, the cumulative cost of never addressing alignment issues is considerable.
The impact on fuel consumption is also measurable. Tyres scrubbing against the road rather than rolling freely create additional rolling resistance that the engine must overcome. Studies suggest misaligned wheels can increase fuel consumption by up to 10%, adding meaningfully to running costs at current UK fuel prices.
When to Have Your Alignment Checked
Alignment can be knocked out of specification by striking a pothole, mounting a kerb, or following any impact to the wheel or suspension. It should also be checked after any suspension repair or replacement, when fitting new tyres, and as a routine check every 12 months or 12,000 miles — whichever comes first.
Signs of misalignment include the vehicle pulling to one side on a straight road, the steering wheel sitting off-centre when driving straight, and uneven or rapid tyre wear. If you notice any of these, book an alignment check promptly rather than waiting for the next service.
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