What is the appropriate tire pressure for high-speed cars?
2 Answers
Generally, the tire pressure of a car is around 220-260Kpa, and it is recommended to inflate the tires to around 250 or 260Kpa. Below is some information about car tire pressure: 1. High tire pressure: When the tire pressure is too high, although the rolling resistance of the tire decreases, making the car more fuel-efficient, excessively high tire pressure reduces the contact area between the tire and the ground, leading to poorer tire grip, longer braking distances, and compromised driving safety. 2. Low tire pressure: When the tire pressure is too low, although it can improve tire grip, it causes a large portion of the tire to come into contact with the ground while driving, increasing fuel consumption. Prolonged extensive friction can easily raise the internal temperature of the tire, causing the gas to expand. Additionally, it can lead to excessive wear in certain areas of the tire, shortening its lifespan, and increasing the risk of the tire sidewall bending or breaking, which may result in a blowout.
Maintaining slightly higher tire pressure on highways is safer. I usually keep my tires at around 2.5 bar when cold. After driving for a while, the tire pressure can rise to 2.8 due to heat. If the pressure is too low when starting, the tires may deform excessively at high speeds, causing instability. Last time on my way to Shanxi, I saw a tire blowout due to insufficient pressure, which was really scary. Refer to the label on your car door frame for specific recommendations. Generally, passenger car front tires should be between 2.3-2.5 bar, and rear tires can be increased by 0.1 if carrying more passengers. Remember to inflate the spare tire higher, around 3.0 bar, to avoid being caught without air in an emergency. In summer, it's advisable to keep the pressure 0.1 bar lower than in winter to avoid a bumpy ride.
