Can run-flat tires still be driven when deflated?
2 Answers
Run-flat tires can still be driven when deflated, allowing continued driving at speeds up to 80 kilometers per hour without immediate tire replacement. Run-flat tires feature thickened rubber sidewalls that can support the vehicle's weight even when air pressure is lost, preventing severe deformation. Therefore, a punctured run-flat tire won't significantly affect the vehicle's operation. These tires consist of an outer tire, standard inner tube, spare inner tube, steel rim, gas generator, pressure sensor, and control unit. The rims are specially designed with raised ridges to prevent tire separation from the rim after sudden pressure loss, ensuring the tire doesn't detach when deformed.
Last time on the highway, my run-flat tire suddenly triggered a warning, and my palms were sweaty. These tires have reinforced rubber layers on the sidewalls to support the vehicle even when completely flat, allowing me to cautiously drive for 20 minutes to reach a repair shop. But remember to keep speed under 80km/h, or the wheel rim may deform, making repairs more expensive. My BMW can last up to 80km in this condition, while a Mercedes might manage around 50km. The steering wheel becomes extremely heavy, and the car noticeably leans toward the deflated side. In such situations, avoid sudden braking—turn on hazard lights and slowly coast to the emergency lane for safety.
