Which Cars Are Equipped with Run-Flat Tires?
2 Answers
Vehicles equipped with run-flat tires include the entire BMW lineup, as well as other models such as the VOLVO S60, Ford SMAX, and Volkswagen R36. Run-flat tires, technically known as "puncture-proof tires," rely on the reinforced sidewalls of the inflated tire to support the vehicle's weight, especially in tires with a larger aspect ratio where the sidewalls are notably thick. In the event of a severe tire blowout, the sidewall can collapse instantly, causing the tire to lose support abruptly. The RSC (Run-Flat System Component) includes RSC tires mounted on EH2 rims and a TPI (Tire Pressure Indicator) electronic warning system. Once tire pressure begins to drop, the RSC immediately alerts the driver. Even if the tire pressure drops to zero, the RSC ensures that the tire remains securely attached to the rim, allowing the vehicle to continue driving for a certain distance.
I currently drive a BMW 5 Series, which comes equipped with run-flat tires. The advantage of these tires is that if they get punctured and lose air, you can still drive about 80 kilometers without having to panic and change to a spare tire. Many high-end cars, such as the entire BMW new car lineup, basically come standard with this feature. Mercedes-Benz models like the E-Class or S-Class also offer it as an option, and even the high-performance version of the Mini Cooper has it. The main advantage of run-flat tires is safety first, especially when driving on highways or in remote areas, as they can prevent blowout accidents. However, they have obvious drawbacks: they cost about 400-500 yuan more per tire than regular tires, and the ride is bumpier, compromising comfort. It's recommended to choose a car that comes with factory-installed run-flat tires to avoid the hassle of retrofitting, which requires considering the tire pressure system and maintenance. Regularly checking tire pressure and wear can extend their lifespan.
