Do Run-Flat Tires Have Inner Tubes?
2 Answers
Run-flat tires do not have inner tubes. The function of run-flat tires is to allow the vehicle to continue driving at a certain speed for a period of time even when the tire pressure is insufficient or leaking, supported by the reinforced sidewalls. The reason run-flat tires are 'run-flat' is due to their thickened rubber sidewalls, which can support the vehicle's weight even when air pressure is lost, preventing severe deformation. Precautions for run-flat tires: 1. Regularly rotate the tires; 2. Avoid speeding to slow down rubber aging; 3. Maintain standard tire pressure, as both overinflation and underinflation can cause excessive tire wear; 4. When replacing tires, perform a dynamic balance test before installation.
Run-flat tires are essentially the type that can still drive for a distance even after a puncture. They indeed don’t have inner tubes, using a tubeless design instead. I’ve driven many cars equipped with these tires and find them quite amazing—the tire sidewalls are particularly rigid, capable of supporting the vehicle’s weight without fear of sudden pressure loss. Think about the old-style tires with inner tubes: once punctured, the inner tube would burst, leaving the car stranded immediately—how dangerous! This new design relies on the tire’s inner wall to seal the air; if there’s a small puncture, air leaks much more slowly, allowing you to make it to a repair shop. The advantage is peace of mind—no need to carry a spare tire to drive safely. However, they require specialized rims for installation and come at a higher price. Overall, tubeless run-flat tires are the trend and better suited for urban driving.
