While a tire’s life may last longer than 10 years, it’s rare. If the manufacture date on the sidewall of the tire makes it older than 10 years, have your spare tire replaced. Check the tread depth. If you’ve bought your car new, it is unlikely that the spare tire has been replaced without your knowledge.

7. When using a spare tire, be sure to read and follow any indications for reduced speed.

50 mph

Make sure to put them in a safe spot so you don’t lose them! Grab your spare tire and line up the 5 holes with the 5 lugs on the wheel. Slide the spare onto the car and replace the lug nuts by hand, tightening them slightly.

Yes it is possible to have a flat tire without a puncture the Air can leak out many different places the valve core ,the valve stem,a bead leak.

There are Several Possibilities as to Why Your Tires Lose Air: a hole in the tread, probably from a nail or something sharp in the road. a poor seal where the tire attaches to the wheel, which lets air escape. a loose or improperly functioning tire valve.

Hand Pressure Push your hand down onto the tire. If the tire feels soft and squishy, the tire pressure is low. If the tire feels rock hard, meaning you are unable to push down on the tire at all, then it is overinflated. If the tire feels too low, pump some air into it while keeping your hand on it.

Most passenger vehicles recommend 33 to 35 psi. At 28 psi, you’re running a little low and really should get them aired back up. That’s not what I would call alarmingly low, but anything more than three or four pounds below normal can cause handling problems and increases the potential for a blow-out.

20 pounds per square inch

It is not safe to drive on, and don’t try to air it up without having a professional look at it on the inside. If you did grind down the tire, even airing it up can cause a blow out which could hurt you.

Driving with a slow leak in your tire is potentially dangerous because it can cause a flat tire. Once the tire becomes flat, it can become a blowout hazard. It is best to get the tire looked at by a mechanic so they can diagnose the problem and repair the leak and/or the tire.

If too low, continue to add air in short bursts and recheck. If you add too much air, let some out by pressing the pin in the center of the tire valve with the back of the air hose nozzle or your tire gauge. Generally, the tire will let out approximately one psi for every three seconds the pin is depressed.