I have noticed how many drivers do not pay enough attention to their tires and tire pressure in general not only on Deloreans but all cars in general. It is critically important to NEVER drive on underinflated tires. It is much safer to drive on an overinflated tire than an underinflated one. Tires lose approx 1 psi for every 10 degrees drop in temperature. Tires also lose about 1 psi per month. At this time of the year with temps dropping 20-30 degrees in a couple of months the tire is 5-6 psi underinflated. This causes unsafe handling, increased tire wear, and increased fuel consumption. Tires should be checked at least monthly with once a week or before any long trip the best advice. Tire pressure should be checked in the morning before driving as driving heats the tire and increases the pressure. (Don't check a hot tire and let air out.) Use a quality tire gauge that costs more than a buck! Always follow manufacturers recomendations, there should always be a label on the car with the tire information regarding size, pressure, and load range. On the Delorean the front is 23 psi the rear 30 and the spare (don't forget it) 60 psi. The tire label is in the glove box on the inside of the door. While you are looking at the tire look at the sides for bulges and the tread for depth comparing it to the tread indicators and eveness of wear. On the Delorean we can't rotate the tires like on most cars so you want to catch uneven wear before you ruin the tires. Use valve caps to keep dirt out of the valves. If you feel vibrations at highway speeds with your foot off the brake get the wheels balanced to reduce wear. Use a good quality tire cleaner with U V protection to keep the tires looking good and longer lasting. This is good advice for any car you or your family drives. David Teitelbaum vin 10757