What is the tire pressure for run-flat tires?
4 Answers
The tire pressure for run-flat tires is actually the same as that for regular tires. The tire pressure is approximately 2kg--2.5kg. Functions of run-flat tires: 1. Maintain balance: It does not mean that it can prevent tire blowouts or air leaks. Its magic lies in the rigid sidewall of the tire. When the tire loses air pressure, the vehicle will immediately lose balance, and the tire will instantly collapse and detach from the rim. At this point, the rim alone must maintain balance. 2. The biggest advantage of run-flat tires: In the event of a tire leak, even if the air pressure inside the tire is completely lost, you do not need to replace the tire immediately. You can still continue driving at a speed of 80 km/h, giving you time to safely reach the nearest car repair shop.
I've been driving for over twenty years and have used various types of tires, including run-flats. The tire pressure is usually indicated on the door pillar label or in the user manual, typically between 30 to 35 PSI. Once, the pressure was too low, causing rapid tire wear and unstable driving, but thankfully the run-flat design allowed me to drive to the repair shop. Now, I've developed the habit of checking the pressure monthly with a digital gauge—neither too high nor too low is acceptable, as it affects handling and fuel consumption. I recommend that car owners refer to the vehicle manufacturer's standards, perform regular maintenance, and ensure safe driving. Run-flat tires are more expensive, but they're a worthwhile investment.
I think run-flat tire pressure settings aren't that mysterious, they're similar to regular tires, mainly in the 28 to 38 PSI range. Check your vehicle's manual for specifics - BMWs might be around 32 PSI, while Mercedes are typically near 35 PSI. Too high pressure makes the ride feel stiff and bumpy; low pressure increases wear and blowout risks. I usually check with a pressure gauge, measuring when cold for accuracy. Run-flats can still drive dozens of miles after a puncture, but maintaining proper pressure prevents issues and extends lifespan.
Tire pressure must be correct, otherwise even run-flat tires can be dangerous. My car's manual specifies 34 PSI, and I make sure to check before every long trip. Too high pressure reduces grip, especially when going downhill in the rain; too low can cause overheating and tire damage. Regular maintenance is key - measure when tires are cold using reliable tools to improve handling and fuel efficiency. Safety first, don't overlook this small detail.
