This is a very important video from ABC News that all should take the time to watch. This is probably the most important thing you can learn about how the age of so called "new" tires can affect the performance of the tires. A definite "must know".

I recommend that you consider passing this on to all your friends and family. 　It's that important.

タイヤの製造年月日はどこに刻印されてるか御存知ですか。

http://abcnews.go.com/Video/playerIndex?id=4826897