Run-flat tires are specially designed tires that allow a vehicle to continue driving even after a puncture or loss of air pressure. They have reinforced sidewalls that support the weight of the vehicle, enabling it to maintain stability and control for a limited distance, usually around 50 miles, at reduced speeds. These tires eliminate the immediate need for a spare tire, making them a convenient option for many drivers. However, they can be more expensive than traditional tires and may offer a stiffer ride. Regular maintenance and monitoring of tire pressure are still essential for optimal performance.