As fall mornings get colder, you may notice a glowing orange exclamation point on your dashboard, signaling low tire pressure. This common phenomenon is often not a sign of damage but a result of the weather change.
The Science Behind Cold Weather Tire Pressure Drops
Air behaves like any other gas—it expands when heated and contracts when cooled. For every 10-degree drop in temperature, tire pressure decreases by 1-2 PSI (pounds per square inch). This happens because cold temperatures slow air molecules inside the tires, causing them to occupy less space.
Additionally, cold weather can make the rubber in your tires contract, creating small gaps between the tire and rim. Over time, this allows air to escape, further reducing pressure.
How to Check Tire Pressure the Right Way
According to Goodyear, always check tire pressure when the vehicle has been stationary for several hours. Most cars have a sticker inside the driver’s side door frame indicating the recommended tire pressure. This ensures an accurate reading without the influence of heat generated from driving.
Benefits of Proper Tire Pressure
Keeping your tires inflated to the manufacturer’s specifications is essential for:
- Fuel Efficiency: The U.S. Department of Energy reports that proper tire inflation improves gas mileage by 0.6% to 3%, saving you money on fuel. Under-inflated tires create more friction with the road, reducing fuel efficiency by about 0.2% per 1 PSI drop in tire pressure.
- Safety: Properly inflated tires enhance vehicle stability, braking performance, and overall safety.
- Tire Longevity: Avoid premature wear and tear by maintaining correct tire pressure.
Pro Tips for Cold Weather Tire Maintenance
- Check Regularly: Monitor tire pressure weekly during colder months to ensure optimal inflation.
- Invest in a Quality Gauge: A reliable tire pressure gauge makes it easy to keep tabs on your tires.
- Visit a Professional: If in doubt, have your tires inspected by a professional for potential leaks or damage.
Don’t let dropping temperatures compromise your safety or your wallet. Keeping an eye on your tire pressure this fall will ensure smoother rides, better fuel efficiency, and longer-lasting tires.
Source: WSAW-TV, Published: Nov.21