BigBadCad said:
Actually nitrogen is used becuase:
1.) it is an inert gas an will not oxidize the innerliner
2.) it is "moleculary" larger than oxygen and will not permiate through the innerliner resulting in a loss of tire pressure over extended periods of time. (Most of us are diligent enough to check our tire pressure from time to time so I don't follow the logic)
I tend to beleive it is a rip off but that's what I have been told at work...
BTW I'm a manufacturing engineer for BFGoodrich so I hope that lends some credibilty.
well I have some useless ambling to add,
i run nitrogen, but mostlu because I carry a large tank of it and it is cheap for me, it cost me 22.00 to get a tank filled, 200c of it. it does have a larger moleculer stucture. costco now has a mitrogen set up as well, most people who favor it are driving alot, rv goers, track racers etc. In arizona this is even more important if you do alot of driving during the summer, having a tire that does not change air pressure or that does not leak down are quick could mean the difference between a blow out/sepperation or not having one occure.
just drive down the freeway at 5 or 6 pm here, the amount of cars on the shoulder of the road is pretty wild sometimes...lots of blowouts due to impropper tire inflation...which causes heat....which causes a bad day.
my thoughts on it anyways,
nitrogen is not a rip off, its a marketed product that has its use to some, and less use to others, personally spending 40 bucks to have someone rotate my tires is a joke...so why couldn't someone justify another 40.00 for a gas that does not fluctuate in pressure?
sounds like they are making money for a reason.
also my in my 86 I got two 36 in tsls with golf balls in them, I ended um running them, about 4 per tire, along with my other two fronts I added them as well, after plenty of driving the golf balls never looked like that, but you could see where they had struck the rim time and time again. they work if you have enough of the propper amount of them to equal the amount of balance your tire needs.