What Is Wheel Alignment?
Wheel alignment (sometimes called tyre alignment or tracking) refers to the adjustment of the angles at which your wheels contact the road. These angles are set by the manufacturer to specific tolerances and affect how the car steers, how evenly your tyres wear, and how much rolling resistance (and therefore fuel consumption) the car experiences.
Alignment is distinct from wheel balancing, which addresses vibration caused by uneven weight distribution around a wheel — though both are often done together.
The Three Main Alignment Angles
Toe
Toe describes whether the fronts of the tyres point inward (toe-in) or outward (toe-out) when viewed from above. It's the most common alignment setting adjusted during a wheel alignment service. Incorrect toe is the biggest cause of rapid, uneven tyre wear — you'll see the inside or outside edge worn down while the rest of the tread is fine.
Camber
Camber is the inward or outward tilt of the tyre when viewed from the front of the car. Negative camber (top of tyre leaning inward) improves cornering grip; too much negative camber accelerates inner tyre wear. Some vehicles have adjustable camber; many modern strut-based suspensions do not.
Caster
Caster is the angle of the steering axis when viewed from the side. Positive caster improves straight-line stability and steering return-to-centre. It is less commonly adjusted but important for vehicles that pull to one side.
Why NZ Roads Cause Faster Misalignment
New Zealand's road network includes a significant proportion of:
- Rural sealed roads with rough chip seal surfaces — constant micro-jarring affects suspension geometry.
- Potholed urban roads — a single significant pothole can knock alignment out immediately.
- Unsealed gravel roads — common outside main centres; gravel and corrugations stress suspension components and shift alignment over time.
- Road humps and speed bumps — hitting these at speed, even on urban roads, can shift toe settings.
NZ roads cause alignment to drift faster than vehicles experience in countries with smoother road infrastructure. Checking alignment annually — or after hitting a significant pothole or kerb — is prudent advice for most NZ drivers.
WoF and Wheel Alignment
Alignment itself is not directly measured at a WoF inspection. However, misalignment that has caused uneven tyre wear below the legal minimum tread depth (1.5 mm across three-quarters of the tyre width in NZ) will result in a WoF failure. Severe misalignment can also contribute to suspension component wear (ball joints, tie rod ends) that inspectors do check.
A WoF inspector may note uneven tyre wear as an advisory — while not a failure point on its own if tread depth is still legal, it flags that an alignment check is needed.
Signs Your Alignment Is Off
- Uneven tyre wear — more wear on one edge than the other across any tyre.
- Vehicle pulls to the left or right on a flat, straight road (let go of the wheel briefly on an empty car park to test).
- Steering wheel off-centre when driving straight — common after hitting a kerb.
- Vibration through the steering wheel — may be balance or alignment.
- Crooked steering wheel after a wheel has been changed or a suspension repair completed.
How Often to Check Alignment in NZ?
- Every 12 months or every 15,000–20,000 km as routine maintenance.
- After any significant impact — hitting a pothole hard, mounting a kerb, a minor collision.
- After suspension or steering work — ball joints, tie rod ends, and steering rack replacement all affect alignment; a re-alignment must follow.
- When fitting new tyres — protect your investment from day one.
NZ Alignment Costs
| Service | Typical NZ Cost |
|---|---|
| Two-wheel (front) alignment | $70–$130 |
| Four-wheel alignment | $100–$180 |
| Four-wheel alignment (larger SUV/ute) | $130–$220 |
| Alignment + balance (4 wheels) | $180–$280 |
Specialised laser or computerised alignment equipment is now standard at most NZ tyre shops and mechanicfinder-listed garages.
What Happens If You Ignore Misalignment?
- Tyre wear accelerates — a misaligned set of front tyres can lose 15,000–30,000 km of tread life.
- Fuel economy worsens — toe-out creates drag; even minor misalignment increases rolling resistance by 1–3%.
- Suspension parts wear faster — incorrect geometry puts uneven stress on ball joints and tie rod ends.
- Handling is compromised — particularly in emergency manoeuvres.
When to Book a Mechanic
- Tyres are wearing unevenly — check alignment before fitting new tyres.
- Car pulls to one side consistently.
- You've recently hit a large pothole or kerb at speed.
- After any suspension or steering repair.