When to Replace Tyres in Perth Heat

Perth summer climate is brutal on tyres. UV exposure, 40C+ ambient temps and hot bitumen (which can hit 65C) accelerate rubber degradation faster than almost anywhere in Australia.

The 4 signs you cannot ignore

1. Sidewall cracking (weathering)

Small spider-web cracks on the sidewall mean the rubber is breaking down. Cracks deeper than 2mm = replace immediately.

2. Tread depth below 3mm

Legal minimum is 1.5mm, but stopping distance increases dramatically below 3mm — especially in Perth summer rain when roads turn slick.

Quick check: insert a 20c coin into the tread groove. If the platypus bill is visible, you are below 3mm.

3. Bulges or blisters

Internal cord damage — usually from hitting a pothole or driving under-inflated in heat. Replace immediately.

4. Tyre age (the silent killer)

Even with tread left, tyres over 6 years old in Perth should be replaced. Check the DOT code: last 4 digits = week/year of manufacture.

Why heat matters more in Perth

• UV breaks down rubber polymers
• Hot bitumen accelerates contact-patch wear
• High temps push internal pressures up
• Salt-laden coastal air corrodes steel belts

Summer maintenance checklist

• Check pressures monthly (cold)
• Rotate every 10,000 km
• Park in shade when possible
• Use manufacturer-recommended pressure, not the max on the sidewall

Free tyre safety check at Welshpool

Drop in for a free check — tread, age, sidewall, pressures, alignment indicators. Tyre On Sale, Unit 7/21 Kewdale Rd, Welshpool. Call 0466 004 999.