Before entering expressways like SLEX, NLEX, Skyway, SCTEX, or TPLEX, most drivers make sure their fuel tank is full and that the engine feels okay.

But there’s one important thing many car owners forget to check properly — tire pressure.

Some drivers even believe that adding a little extra air is safer for long drives. But is it really?

The truth is: overinflated tires can be dangerous, especially at expressway speeds in Philippine driving conditions.

What Does “Overinflated” Really Mean?

A tire is considered overinflated when its air pressure exceeds the manufacturer-recommended PSI for your specific vehicle.

This usually happens when:
•    A vulcanizing shop adds “extra PSI para sa long drive”
•    Drivers rely on the PSI printed on the tire sidewall
•    People assume harder tires save more fuel

⚠️ Important clarification:

The PSI printed on the tire is the maximum pressure the tire can handle, not the recommended pressure for daily driving.

These common beliefs may sound practical, but at high speeds, they can actually increase accident risk.

Why Overinflated Tires Are Risky on Expressways

1. Less Grip on the Road

When a tire is overinflated, it becomes too stiff. Instead of the full tread touching the road, only the center makes contact.

On expressways, this can lead to:
•    Less grip during sudden braking
•    Poor control during lane changes
•    Reduced stability at high speeds

At 80–100 km/h, even a small loss of traction can make a big difference in stopping distance and control.

2. Higher Risk of Tire Blowouts

Philippine expressway driving often involves:
•    Long, continuous stretches of driving
•    High ambient temperatures, especially during summer
•    Heat buildup inside the tire

Overinflated tires already have higher internal pressure. When heat builds up, the pressure increases further — raising the risk of a sudden blowout, particularly on long trips.

3. Faster Tire Wear (and Higher Costs)

Overinflated tires wear out unevenly, mostly in the center tread.

This leads to:
•    Shorter tire lifespan
•    Earlier replacement than expected
•    Less reliable performance over time

On expressways, worn tires aren’t just expensive — they’re a safety hazard.

4. Rougher Ride and Added Stress on Your Car

Not all expressway sections are perfectly smooth. Expansion joints, uneven patches, and minor road damage still exist.

Because overinflated tires absorb less shock, they transfer more impact to:
•    Suspension parts
•    Wheels and rims
•    Steering components

Over time, this affects ride comfort and can accelerate wear on key vehicle components.

Why Many Drivers Still Overinflate Their Tires

This habit is common among Filipino drivers because:
•    “Ganito ang sabi ng vulcanizing”
•    Fear of tire damage on long drives
•    Misconceptions about fuel efficiency
•    Lack of awareness about correct PSI

Unfortunately, these shortcuts often create bigger and more expensive problems later on.

So, What Is the Correct Tire Pressure?

The correct PSI is not the number printed on the tire.

Always check:
•    The sticker on the driver-side door jamb
•    The vehicle owner’s manual
 

This recommendation is based on your car’s weight, suspension, and driving conditions — including Philippine roads and traffic patterns.

A Simple Expressway Safety Tip

Before heading out on an expressway drive:
•    Check tire pressure while the tires are cold
•    Avoid inflating tires right after a long drive
•    Don’t forget to check the spare tire
 

Proper tire pressure helps ensure:
•    Better braking performance
•    Improved stability
•    Safer handling
•    Better overall driving confidence
 

Overinflated vs Underinflated: Which Is Worse?

Both are risky.
•    Overinflated tires increase the chance of blowouts and loss of grip
•    Underinflated tires cause overheating and higher fuel consumption

The safest option is always sticking to the manufacturer-recommended PSI.

Overinflated tires can reduce grip, increase heat buildup, and raise blowout risk — especially on long expressway trips.

If your tires are already worn unevenly or due for replacement, don’t wait for a roadside emergency. Check out Gulong.ph to find the right tires for your vehicle and driving needs, and schedule installation conveniently before your next out-of-town drive.

Safe speed starts with safe tires.