Originally posted by: Sukhoi
Tires that old very likely have dry rot. Check them closely for cracks and bubbles. Just this past weekend I had to replace my tires that had excellent tread, but the inside of one tire was totally separated on the sidewall for a 8" arc. Considering I get up to about 70 MPH every day going to work I don't know how it didn't blow out on me before catching it.
I didn't have a look when the guy took off and checked the tire. They wanted me to sit in a waiting room, but when they finally did get to my car I was standing outside the garage looking in, watching what he was doing more or less out of curiosity. I couldn't determine anything from watching what he did. I certainly didn't have an opportunity to see the inside of the tire. The four tires look OK from the outside. When I get around to rotating them, I will try to get the opportunitiy to inspect them. Maybe I'll just buy new tires when they get to 10 years old. I wonder if old tires get "dry rot." I think that's actually bacterial decomposition, as in wet wood. I figure that real old tires will dry out, maybe suffer from UV decomposition. I think I've seen old rubber that appears to be drying and cracking. I wonder what they make tires from nowadays, if it's actual rubber from rubber trees from South America or a rubber-like compound derived from oil.
Montanafan - I'll post back the results. Assume the tire's holding air now unless I post. If it's leaking I'll revisit the thread with the news.
I figure that I'll stick with manufacturer's recommendations on the vehicle:
front: 32#
back: 26#
I rarely have weight in the vehicle.