Tyres are often the most neglected safety component on a car. They are your only contact with the road — four patches about the size of your hand are all that is keeping you in control.
Legal Requirements in Victoria
The legal minimum tread depth in Australia is 1.5mm across the full width of the tread. However, tyre performance drops significantly well before reaching this minimum. We recommend replacing tyres at 3mm for safety, especially for wet weather grip.
How to Check Tread Depth
Most tyres have tread wear indicators — small raised bars in the tread grooves. When the tread surface is level with these bars, the tyre is at 1.6mm and needs immediate replacement. For a quick check between inspections, insert a matchstick head-first into the groove. If you can see the entire head, the tread is getting low.
Warning Signs Beyond Tread Depth
Uneven Wear
Wear on one edge suggests alignment issues. Wear in the centre means over-inflation. Wear on both edges means under-inflation. Cupping or scalloping indicates worn suspension components. Any uneven wear pattern means something else needs attention too.
Cracks in the Sidewall
Sidewall cracking (dry rot) happens as rubber ages and is accelerated by UV exposure and heat. Cracked sidewalls can lead to sudden blowouts. Age matters — even tyres with good tread should be replaced after 5-6 years.
Bulges or Blisters
A bulge on the sidewall means the internal structure is damaged, usually from hitting a pothole or kerb. This is a blowout waiting to happen. Replace the tyre immediately.
Vibration
Vibration through the steering wheel at highway speeds can indicate an out-of-balance tyre, a damaged tyre, or a bent rim. Get it checked promptly.
How Often Should You Rotate Tyres?
Every 10,000 km or at each service. Front tyres wear faster on front-wheel-drive cars (most cars). Rotation promotes even wear and extends the life of the set.
Not sure about your tyres? Bring your car in for a free tyre inspection at Heatherdale Automotive.