If you come out to the parking lot and discover your car has a flat you might be in luck with a can of this tire sealer, which was included in the kit. Check to see if the tire bead is still seated on the rim and if it is you can re-inflate the tire and the sealant in the compound will close a small leak in the tire and get you underway. A small 12-volt compressor is another option too. If you've had a flat while the car is in motion then you're probably out of luck because the tire bead will be separated from the rim of the wheel. Time to get out the jack and spare, which of course is OE on any class Ford car that you may be driving. Take note that if you upgrade to disc brakes be sure to have a spare that will fit over your modern binders. A 14-inch wheel in the trunk will do your 13-inch front brakes no good.