Inside or outside edge
Usually wheel alignment out of spec, often after hitting a kerb or after suspension work.
Both edges
Running underinflated.
Centre
Running overinflated.
Patchy or cupped
Worn shock absorbers or balance problems.
WOF and safety
The legal minimum tread depth in New Zealand is 1.5 mm across the tyre. Check the whole width, not just the outside.
Safe to drive?
Fine to drive if the tread is above the legal minimum and there is no bulge or exposed cord. Bulges or cords showing: replace before driving.
General guidance only, not a diagnosis. If in doubt, do not drive it and have it inspected. In an emergency, call 111.
Who can help
Get quotes for tyres & wheel alignment near you
Questions
Do I need an alignment with new tyres?
It is a good idea if the old ones wore unevenly, otherwise the new tyres wear the same way.
What should I put in the job?
Tyre size (on the sidewall), which tyres are worn and how.
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