This is the tire safety program I talked about last week under the thread "Topping Up Your Tire Pressure" that has gotten out of hand with the Nitrogen thing. This is a power point, I am hoping it come out on the forum.
I finally got to view it. Good information but I believe the "expiration" time they give of 4 years is a bit misleading. Tires last longer than 4 years but I don't think one should buy a "new" tire that is 4 years old. Usually this isn't a problem when buying from a high volume tire center, they turn their stock over to fast for them to get too old in most cases.
I would guess that a lot of guys are gonna watch this and think they need to change their tires every 4 years which isn't really true.