What is the normal tire pressure for run-flat tires?
3 Answers
Standard tires have a recommended pressure of 240kpa-250kpa, while reinforced tires should be inflated to 280kpa-290kpa. Note that cold tires and hot tires have different pressures, with hot tires being about 20kpa higher than cold tires. The manufacturer's recommended value refers to cold tire pressure, which should be around 230kpa-250kpa when the vehicle is cold. However, always refer to the specific pressure marked for each vehicle. The reasons are as follows: 1. Tire pressure is a crucial factor affecting tire lifespan and fuel efficiency. Improper tire pressure selection can cause power cycling, increasing tire wear and reducing service life. Considering its impact on vehicle performance, selecting the appropriate tire pressure is essential for extending tire life and improving economy. 2. Tire pressure is significantly affected by seasonal factors. In summer, high temperatures cause tires to heat up during driving. Excessive pressure may lead to blowouts, so slightly lower pressure is recommended. In winter, tire pressure should be slightly higher than in summer due to thermal contraction and expansion. A winter tire pressure between 250kpa-280kpa is generally appropriate.
The normal tire pressure for run-flat tires is typically between 30 to 35 PSI, but it's best to check your vehicle's owner's manual or the label on the door frame for the official recommended value. I've made it a habit to use a portable tire pressure gauge every time I refuel, as low pressure increases the risk of a blowout and fuel consumption, while high pressure makes the ride bumpy and uncomfortable, affecting handling. Especially during seasonal changes—tire pressure tends to rise in summer and drop in winter—so I check at least once a month. Remember, even though run-flat tires can drive at zero pressure, maintaining the right pressure is key to daily safety, otherwise, your vehicle's wear will accelerate.
I always drive long distances, and I've found from experience that maintaining the tire pressure of run-flat tires around 32 PSI is the most stable. If the pressure drops below 30, the car feels sluggish and unstable when turning; above 35, it becomes too stiff with excessive road feedback. Last time I was on a business trip, the tire pressure wasn't properly adjusted, and my fuel consumption increased significantly. I recommend keeping a digital tire pressure gauge in the trunk and checking it regularly when the car is cold for accurate readings. The proper tire pressure range isn't just about numbers—it affects tire lifespan and fuel efficiency, so it's not something to take lightly.
