What is the suitable tire pressure for a new car?
3 Answers
New car tire pressure is divided into the following situations: 1. The tire pressure of standard tires is between 240 and 250 kPa; 2. The tire pressure of reinforced tires is between 280 and 390 kPa, with the maximum pressure not exceeding 350 kPa. The normal tire pressure depends on different tire types and the specified values of the tires. Usually, the original standard pressure value will be posted on the car door or fuel tank cover. When the tire pressure exceeds 30% of the specified value, the probability of a tire blowout will greatly increase. The spare tire's pressure should be higher, usually above 250 kPa, to avoid too low pressure, and then adjusted to the appropriate tire pressure when in use. Tire pressure should also be adjusted according to the season. Based on the principle of thermal expansion and contraction, in summer and autumn when temperatures are higher, the tire pressure should be slightly lower, while in winter and spring when temperatures are colder, the tire pressure should be higher.
New car tire pressure must follow the manufacturer's recommendations, never guess. The standard value is usually found on the door frame or fuel cap, typically around 2.2 to 2.5 bar. In winter, you can inflate slightly higher, and in summer, slightly lower. Incorrect tire pressure affects safety—too high causes rapid wear in the center and a bumpy ride, while too low accelerates wear on the sides, makes steering harder, and increases fuel consumption. I check it every season with a simple tire pressure gauge; if the deviation exceeds 0.2 bar, adjust it. Pay extra attention to the spare tire pressure—inflate it to at least 2.8 bar, or it’ll be useless in an emergency. New cars often come with overinflated tires, so remember to recheck after delivery—don’t skip it.
Tire pressure is something that really needs to be taken seriously. For new cars, the standard tire pressure can be found in the manual or on the label on the driver's door frame. The cold tire pressure for ordinary sedans is usually between 32-36 psi. Improper tire pressure not only wastes fuel but also damages the tires—too low pressure causes excessive rubber deformation and heat buildup, which can lead to blowouts at high speeds; too high pressure reduces the tire's contact area, making it prone to skidding in rainy conditions. Personally, I use an electronic tire pressure gauge to check all four tires plus the spare at the beginning of each month. If the readings vary too much, I take it to a repair shop. It's also essential to check tire pressure after changing tires—don't assume the new tire should have the same pressure as the old one. For the spare tire, I inflate it directly to 3.0 bar since it tends to lose air quickly when stored for long periods.
