How Long Can a Run-Flat Tire Be Driven After Losing Air?
2 Answers
Run-flat tires can continue to be driven for 50 to 250 kilometers at a speed of 80 km/h even after the tire pressure is completely lost, without the need for immediate tire replacement. Here is relevant information: 1. BMW: BMW is the world's first manufacturer to provide customers with the Run-Flat System Component (RSC). The RSC includes RSC tires mounted on EH2 rims and a TPI electronic warning system. Once the tire pressure begins to drop, the RSC immediately alerts the driver. However, even if the tire pressure drops to zero, the RSC ensures that the tire remains securely fixed to the rim, allowing the vehicle to continue driving for a certain distance. 2. Principle: Due to the specially designed rim hump, the EH2 (widened hump) rim prevents the tire from detaching from the rim after a sudden pressure drop. The differences between RSC tires and conventional tires include run-flat characteristics, reinforced sidewalls, additional valve straps, and highly heat-resistant synthetic rubber materials. Depending on the vehicle load, these self-supporting tires enable the vehicle to continue driving at a maximum speed of 80 km/h for 50 to 250 kilometers even when the pressure drops to a minimum.
When I first started driving, I encountered a situation with a run-flat tire losing air. After checking the manual and consulting a mechanic, I learned that generally, you can drive about 50 kilometers or so, and it's best to keep the speed under 80 km/h. In my case, I drove over 30 kilometers to the repair shop, and the tire was preserved without much damage. If you continue driving for too long, the wheel rim may deform or the suspension could be affected, significantly increasing the risks. It's advisable to take immediate action once you notice the tire is losing air and not wait until it's completely flat. Regularly checking the tire pressure monitor can help detect issues early and avoid trouble. Cars are all about safety, and you can't afford to be careless. I always keep emergency tools and the contact information of repair shops in my car for peace of mind. In short, run-flat tires give you some buffer time, but don't expect them to perform like normal tires over long distances.
