What is the recommended tire pressure for ordinary cars?
2 Answers
For ordinary car tires, a pressure of 2.2 to 2.7 bar is recommended, with the standard tire pressure ranging between 2.4 to 2.5 bar. The hazards of excessive tire pressure are: 1. Reduced friction and adhesion of the tire, affecting braking performance; 2. Causes steering wheel vibration and deviation, reducing driving comfort; 3. Accelerates localized wear of the tread pattern in the center of the tire, shortening tire lifespan; 4. Increases vehicle vibration, indirectly affecting the lifespan of other components. The hazards of insufficient tire pressure are: 1. Increases the friction coefficient with the road surface; 2. Makes the steering wheel heavy and prone to deviation, which is detrimental to driving safety; 3. Increases the movement of various parts of the tire, causing abnormal heat due to excessive rolling.
I've been driving for over ten years, so I have a lot to say about tire pressure. For regular car tires, you generally want to keep them between 32 to 35 psi, but it depends on the vehicle model. Most cars have a small label on the door frame indicating the exact value—for my car, 32 psi is optimal. Always measure when the tires are cold—that means after the car has been parked overnight or early in the morning before driving. Hot tires after driving will give inaccurate readings with higher pressure. Overinflating wears out the center of the tire faster, makes the ride bouncy and unstable, and increases braking distance. Underinflating, on the other hand, raises fuel consumption, accelerates wear on the tire shoulders, and increases the risk of a blowout. I make it a habit to check the pressure weekly when refueling using free air gauges, especially during seasonal changes. In summer, high temperatures can increase pressure, so don’t fill to the max; in winter, cold weather causes pressure to drop quickly, so top up more often. Developing this habit ensures safety, saves money, and extends tire life by several years.
