Run-flat tires are an increasingly common type of tire on passenger cars. Manufacturers such as BMW are mounting them on new cars instead of equipping the car with a spare tire. Doing so saves weight ...

Four Wheeler Tech Editor Verne Simons finds a bolt in the tire of his old Jeep and shows us how to plug the hole.

Q: I am planning a summer road trip. If it were you, what would you keep in your car in case of emergencies? A: I would start with a portable air compressor and tire plug kit. Plugging a tire is a ...