After reading Kkercg's question about a cross country trip and the good advice of several to take a spare tire, I thought I might share something that happened to me last fall. Took a trip to Texas after installing a new set of tires. Had been cruising at 70 mph and slowed to about 50 for a sharp curve and coming out of the curve and starting to accelerate I started to hear road noises and a little fishtailing. I pulled over and found a rear tire with almost shredded sidewalls. I had to have driven with a low tire for some time to do that kind of damage, but with those rough-surface Texas hiways and a me being tired and not noticing the low tire warning it caught me by surprise. The moral being, watch your tire pressure. Those low-profile tires and a noisy highway can camoflage an approaching problem. I did have a spare, luckily! I was thinking bad thoughts about that new tire....a blowout in the first 500 miles....until I got home and found a piece highway debris embedded in the tread. Obviously I had driven for several miles on a very low tire without being aware of it.