Why Summer Heat Is Harder on Your Tires Than You Think
Most drivers in New Westminster worry about their tires in winter — and for good reason, with our wet, occasionally icy roads. But July and August bring their own risks. When temperatures climb into the high 20s and 30s, the air inside your tires expands, pushing pressure higher. Combined with scorching asphalt on highways like Highway 1 or the Lougheed, that extra stress can turn a small tire issue into a dangerous blowout.
At Safari Auto Tires on Quebec Street, we see the same pattern every summer: drivers come in after a blowout that could have been prevented with a simple pressure check. Here is what you need to know to keep your tires safe through the hottest months of the year.
How Heat Changes Tire Pressure (and Why It Matters)
The science is straightforward. For every 5.5°C increase in outside temperature, your tire pressure rises by roughly 1 PSI (pound per square inch). A tire set to 32 PSI on a cool 15°C spring morning could easily hit 36–38 PSI on a 30°C July afternoon — before you even start driving.
Once you are on the road, friction between the tire and the pavement adds even more heat, pushing pressure higher still. An overinflated tire has a smaller contact patch with the road, which means:
- Longer braking distances, especially on hot asphalt
- Reduced traction in corners
- A harsher, less comfortable ride
- Increased risk of tread separation or a blowout, particularly on older or worn tires
Underinflation is equally dangerous in summer. A tire low on air flexes more as it rolls, generating excessive heat that can break down the internal structure and cause sudden failure at highway speeds.
Check Your Pressure the Right Way — When Tires Are Cold
The only way to get an accurate pressure reading is to check your tires when they are cold — meaning the vehicle has been parked for at least three hours or driven less than 2 kilometres. If you check pressure after a drive across New Westminster on a sunny afternoon, the reading will be artificially high, and you risk underinflating.
Here is a simple summer routine we recommend at Safari Auto Tires:
- Check cold pressure every two weeks during hot weather, not just once a season
- Use the PSI on your driver's door jamb sticker — do not go by the maximum pressure printed on the tire sidewall itself
- Do not bleed air from hot tires just because the reading looks high. That pressure is normal for a warm tire and will drop back down once it cools
- Inspect the spare — it is often forgotten and may be dangerously low when you need it most
Watch for These Warning Signs of Heat-Related Tire Stress
Heat accelerates wear and exposes existing weaknesses. Before a long summer drive — whether you are heading to Cultus Lake, the Okanagan, or just across the Pattullo Bridge — take a moment to look for:
- Bulges or blisters on the sidewall. These indicate internal damage and the tire could fail at any moment
- Cracks in the rubber, especially near the rim or in the tread grooves. UV exposure and heat dry out tires, and cracks mean the rubber is losing its integrity
- Uneven wear patterns that may point to alignment or suspension issues, which worsen under heat stress
- Excessive vibration at highway speeds, which could signal a failing belt inside the tire
If you notice any of these, do not wait. A blowout on a hot highway is far more costly — and dangerous — than a quick inspection.
Summer Road Trip? Get a Pre-Trip Tire Check
If you are loading up the family and heading out of town this summer, your tires are working harder than usual. Extra passengers, a full trunk, and a roof rack all increase the load on your tires. Hot pavement only amplifies that strain.
Swing by Safari Auto Tires at 1025 Quebec Street in New Westminster before you go. We will check your pressure, tread depth, and overall tire condition — and if anything needs attention, we will let you know honestly. A five-minute check can save you from spending your vacation on the side of the highway. Call us at +1 604-544-4040 or visit safariautotires.ca to learn more.
