What is the appropriate tire pressure for a car?
2 Answers
Under normal circumstances, the recommended tire pressure for cars is 2.5 kgf/cm² in winter and 2.2 kgf/cm² in summer. The maximum allowable tire pressure is indicated on the sidewall of the tire. Generally, a reasonable tire pressure is 70% to 80% of the maximum pressure marked on the tire, but it is best not to exceed the maximum pressure indicated. Below are relevant details about car tire pressure: 1. If the car is fully loaded (5 people), adjusting the tire pressure to around 2.5 kgf/cm² is more suitable. For two passengers, a tire pressure of 2.3 kgf/cm² is also normal. 2. For daily tire use, it is important to pay attention to tire pressure. Generally, cars travel at high speeds, and the shape of the tire undergoes high-frequency alternating changes. If the pressure is insufficient, deformation increases, causing excessive wear on the tread edges. The tire body may twist and deform due to inability to withstand ground pressure, generating heat and accelerating tire wear, ultimately leading to a blowout. 3. Excessive pressure can also make the tire too rigid, losing its necessary elasticity and shock absorption capacity. This not only reduces grip but also causes uneven tread depth due to excessive wear in the central tread. Tires operating at high speeds may also fail to withstand excessive expansion pressure, leading to a blowout. Therefore, both overinflation and underinflation pose blowout risks, and tire pressure should not be overlooked. Always maintain the standard tire pressure as recommended by the manufacturer, including the spare tire pressure.
When driving, I often remind my friends to pay attention to tire pressure, as it's crucial for road safety. For most passenger cars, the recommended tire pressure is between 30 to 35 PSI, but always check the label on the door frame or the owner's manual, as requirements vary by vehicle. Low pressure can cause the tires to overheat, deform, and increase the risk of a blowout, making the car feel sluggish with poor traction. On the other hand, overinflated tires wear out faster in the center and make the ride uncomfortably bumpy. I recommend checking the tire pressure monthly with a gauge, preferably when the tires are cold—avoid checking right after driving, as temperature affects the reading. During seasons with significant temperature changes, like winter when pressure drops due to cold, you may need to add some air. Never overlook this; proper tire pressure not only prevents accidents but also improves fuel efficiency and extends tire life.
