Are Run-Flat Tires Immune to Blowouts?
2 Answers
Run-flat tires refer to tires that can continue to be driven for a certain distance even after a blowout or air leakage, when the tire pressure is insufficient, allowing time to safely reach the nearest auto repair shop, rather than meaning they cannot blow out. Whether ordinary tires or run-flat tires, daily maintenance should be paid attention to during use. Generally, the sidewalls of run-flat tires are marked with RSC or SSR, and their prices are higher than those of ordinary tires. The reason run-flat tires can continue to be driven after a blowout is that their sidewalls are thickened. Even without air pressure, they won't collapse and can support the car to continue driving. After a regular car tire blows out, it must be stopped to change the tire or call for a tow truck, otherwise accidents are likely to occur. At this time, if run-flat tires are installed, the car can be driven to a safe place for operation, thus ensuring safety. Therefore, what run-flat tires prevent are more the accidents after a tire blowout. Moreover, 'run-flat tire' is not its real name; the true name of run-flat tires is 'tire pressure monitoring system (TPMS) tires'.
To be honest, I was also misled by the name. Run-flat tires should actually be called air-loss resistant tires. Last month, my colleague experienced it firsthand when he ran over a steel bar on the highway—his BMW's run-flat tire still got a huge hole. But the amazing thing is, thanks to the thickened rubber layer in the sidewall supporting it, the car could still drive at 60 km/h for over 20 kilometers to find a repair shop. The biggest advantage of this type of tire is that it won’t collapse instantly after a blowout, preventing rollovers, but sharp objects can still puncture it. I recommend replacing tires older than 5 years even if there are no cracks, as the rubber degrades and the run-flat performance drops significantly.