If your car drifts toward the kerb or the centreline on a flat, straight section of road, something is asking for attention. It is usually not the most expensive thing on the list, but ignoring it costs you a set of tyres, fuel, and eventually a more serious repair.
The quick answer: there are six common causes. In rough order of how often we see them in the workshop:
- Uneven tyre pressure, especially front to front
- A defective or “conical” tyre with internal damage
- Wheel alignment out of spec
- A sticking brake calliper on one side
- Worn suspension components (tie rod end, ball joint, control arm bush)
- Road camber (sometimes the car is not pulling, the road is)
This post walks through each one, how to tell which one you have, and what it costs to fix.
Before you start: rule out the road
Most Melbourne roads have a slight camber (a sideways slope) so water drains off. On a road with a left-to-right camber, your car will gently drift left. That is the road, not the car.
The proper test is on a flat, straight, low-traffic section, ideally a freeway in light conditions. Try a section of the Eastlink, Monash, or Princes Highway when traffic is light. Drive in the centre of the lane with light hands on the wheel. If the car pulls noticeably in two different directions on different stretches, the camber is doing it. If it pulls in the same direction on every stretch regardless of camber, something on the car is causing it.
Cause 1: Uneven tyre pressure (the easy one)
Tyre pressure that differs by even 4 to 5 psi between the front-left and front-right makes the car pull toward the underinflated side. The under-inflated tyre has more rolling resistance, so the car effectively tries to “steer” toward it.
How to tell:
- Check all four tyre pressures cold (the car hasn’t been driven for at least three hours).
- Compare them to the placard on the driver’s door jamb.
- A difference of 4 psi or more between matched tyres on the same axle is enough to cause a noticeable pull.
Fix: Set all four to the placard pressure. Drive the car. If the pull goes away, that was your cause. If it does not, move to the next item.
Cost: Free if you do it at a service station, $0 at our free tyre check appointment.
Cause 2: A defective or “conical” tyre
A tyre with internal damage (a manufacturing defect, or damage from a kerb hit or pothole) can develop a slight conical shape, where the inner construction is no longer symmetrical. The tyre wants to roll in a curve rather than in a straight line, and the whole car follows it.
How to tell:
- Swap the front tyres left-to-right and drive again.
- If the pull reverses direction (now pulls the other way), the cause is one of the front tyres.
- If the pull stays the same direction, it is not a tyre.
This swap test is the single most useful diagnostic for a car-pulling complaint and is the first thing we do in the workshop.
Fix: Replace the defective tyre. If it is under three months old, ask the shop you bought it from about a warranty replacement, since manufacturing defects are usually covered.
Cost: $180 to $450 per tyre depending on size and brand. Browse tyres by size for a quick price guide.
Cause 3: Wheel alignment out of spec
If you have already checked pressures and ruled out a defective tyre, alignment is the next stop. Alignment goes out from kerb hits, deep potholes, heavy speed bumps, and slow drift after suspension work. Even 1 to 2 mm of incorrect toe is enough to put the steering wheel off-centre and pull the car.
How to tell:
- Steering wheel sits off-centre when driving straight.
- Uneven tyre wear across the tread, especially feathering or wear on one shoulder.
- Pull is consistent in one direction regardless of road or load.
- You recently hit a kerb, a deep pothole, or had suspension work done.
Fix: A four-wheel alignment on a Hunter HawkEye Elite or similar four-camera machine. Avoid the cheap string-laser alignments, which miss the more subtle angles modern cars depend on. Our full post on what a wheel alignment actually does covers this in more detail.
Cost: $90 to $180 in Melbourne for a proper four-wheel alignment.
Cause 4: A sticking brake calliper
Brake callipers contain pistons that press the pads against the disc when you brake, then release when you let off. The pistons can stick due to corroded seals, old brake fluid, or worn slider pins. When one calliper stays partly engaged, it drags constantly on that wheel and pulls the car toward that side.
How to tell:
- Pull gets worse as you drive (the dragging brake heats up).
- After a 30-minute drive, the wheel on the pulling side is noticeably hotter than the others (test carefully, wheels can be very hot).
- You smell brake-burn, especially on long drives.
- Pull is much more pronounced during light braking than when cruising.
- Fuel economy has dropped recently.
Fix: Strip and rebuild the calliper, or replace it. Brake fluid flush is usually included.
Cost: $280 to $650 per calliper depending on the car. See brake repairs for more.
Cause 5: Worn suspension components
A worn tie rod end, control arm bush, or ball joint allows the wheel to move slightly out of alignment under load, even though static alignment numbers look fine. The car wanders, pulls inconsistently, and the steering feels loose.
How to tell:
- Pull changes depending on whether the car is loaded or empty.
- Pull gets worse over bumps.
- Clunking or knocking from the front end on rough roads.
- Steering feels vague or “wandery” rather than precise.
- The car may pass an alignment check on a stationary rig but pull as soon as you drive it.
Fix: Replace the worn component, then re-do the alignment afterwards. Cheaper to do both at the same workshop visit.
Cost: $300 to $1,400 depending on which component, plus the alignment afterwards. See suspension repairs.
Cause 6: Road camber (the false alarm)
Sometimes nothing on the car is wrong. The road just slopes. The test, again, is to drive on multiple roads with different camber and see whether the pull is consistent.
If the car only pulls on one particular section of road, or if the direction changes between roads, the camber is the culprit. Nothing to fix on the car. Just centre the steering wheel and carry on.
The diagnostic order: how to narrow it down without guessing
If you want to work through this yourself before booking the car in, this order saves time:
- Check all four tyre pressures cold. Set to placard. Drive. Has the pull gone? If yes, done. If no, continue.
- Swap the front tyres left-to-right. Drive. Did the pull reverse direction? If yes, you have a defective tyre. If no, continue.
- Look at the tyre tread for uneven wear. Feathering, edge wear, or scrubbed shoulders point to alignment.
- After a 30-minute drive, check whether one front wheel feels hotter than the other. Hot wheel = sticking calliper.
- Test the front suspension for play. Grab each front wheel at 9 and 3 o’clock and rock it. Knocking or movement points to a worn component.
If you have done 1 and 2 and the pull is still there, book the car in. The remaining causes need the car on a hoist and a four-wheel alignment rig to diagnose properly.
When to keep driving and when to stop
A mild pull from uneven pressure or alignment is not dangerous in the short term, but it will chew through tyres faster and waste fuel. Get it sorted within a week or two.
Stop driving and get the car to a workshop today if:
- The pull is severe enough that you have to fight the wheel to stay straight.
- The pull came on suddenly after hitting something on the road.
- There is a burning brake smell, or one wheel is glowing hot.
- The car pulls hard during braking (this can be a serious brake fault).
A hard pull under braking is the one symptom in this article that genuinely deserves immediate attention. Anything else, you have time to book in this week.
Frequently asked questions
Why does my car only pull when I brake? This is usually a brake-side issue: a sticking calliper on one front wheel, a leaking brake hose, or unevenly worn pads. It is more serious than a steady pull and worth checking promptly.
Can a wheel alignment fix a defective tyre? No. Alignment adjusts the angles your wheels sit at. If the tyre itself has internal damage, no amount of alignment will fix it. The swap test (Cause 2) tells you whether you are dealing with a tyre or something else.
My car started pulling after I hit a pothole. What should I do? Two things to check. First, look at the tyre and the wheel for visible damage (bulges in the sidewall, dented or cracked rim). Second, get an alignment check, because pothole hits commonly knock the alignment out of spec. Driving on a damaged tyre is dangerous; driving on a misaligned car is just expensive.
Will tyre rotation fix a car that’s pulling? Sometimes, in the same way the swap test does. If you rotate front-to-rear and the pull goes away, one of the front tyres was the cause. Routine rotations every 10,000 km are still a good idea regardless.
How much does it cost to diagnose a pulling problem? Most workshops will diagnose for free if you are willing to commit to the repair. At Tyre Doctors the free tyre check covers the first three causes (pressure, tyre swap, visual alignment indicators) at no charge. If a deeper diagnosis is needed, we will tell you what it costs before starting.
Get the pull sorted
Free 15-minute diagnostic check. If it is something we can fix on the spot (tyre pressures, swap test), we do it then and there. If not, you get a written quote before any work starts.
Tyre Doctors 5/1644 Ferntree Gully Road, Knoxfield VIC 3180 Phone: (03) 9763 0100 · Mobile: 0455 330 000 Hours: Mon–Fri 8 AM to 5 PM, Sat 10 AM to 3 PM, closed Sundays
Related: Wheel Alignment Melbourne · Brake Repair · Suspension Repair