[mgarblik]

Common sense needs to rule the day when it comes to tire replacement. Don't think it's necessary to scare the heck out of someone who runs a 9 or 10 year old tire on a collector car under certain conditions. Those conditions are, 1. proper tire pressure, 2. visual inspection of the rubber and the tread rubber deep into the root of the tread. If the rubber is cracking, time for new tires. If the tires are frequently exposed to high temps or lots of direct sunlight, they may need replacement at 5-6 years. Yes, they begin to degrade at that point, but collector cars frequently are not driven daily and don't get the sun and heat cycles. After 6 years, they need more frequent inspection and replacement is recommended at 10 years regardless of use, tread, and storage practices. It's hard to part with a set of tires that pass a visual inspection, run smoothly, and are perfectly balanced. The new replacements may be worse than what you are discarding although newer. Running tires for extended periods over 10 years old may be a bit risky.