Is it better to have higher or slightly lower tire pressure on the highway?
2 Answers
It is better to have slightly lower tire pressure on the highway, but not too low. The main reasons are as follows: 1. Pressure increases: When driving at high speeds on the highway, continuous friction generates heat in the tires, causing the internal gas pressure to rise. 2. High temperatures can lead to punctures: In summer, combined with high temperatures, excessive tire pressure can easily cause punctures, leading to traffic accidents. 3. Risks of too low pressure: If the pressure is too low, the contact area between the tire and the ground increases, accelerating tire wear and increasing fuel consumption.
When driving on the highway, the tire pressure must never be too low or too high—it should always be set according to the recommended cold tire pressure specified in the vehicle manual. Low tire pressure is the most dangerous, especially at high speeds where friction can cause excessive tire flexing, overheating, and a significantly increased risk of a blowout. Imagine your car speeding at 100 kilometers per hour—insufficient pressure puts immense strain on the tire sidewalls, which could burst at any moment and cause an accident. Slightly higher pressure may reduce rolling resistance and save a bit of fuel, but excessive pressure reduces the tire's central contact with the road, leading to poor grip and unstable handling, especially in wet conditions or during turns. I recommend checking the tire pressure with a gauge before hitting the highway to ensure it's within the standard range, with no more than a 10% deviation. Don’t worry if the pressure rises slightly after driving due to heat—this is normal. However, regular checks are essential to avoid unexpected issues. Remember, safety comes first—don’t gamble with your life to save a few bucks.
