Yep, had those salesmen too, was interested in my last car and had multiple meetings/test drives with the same salesman, in the end he couldn't meet price target and found a dealer an hour away willing to do it mostly through email communication.
as well, Nitrogen got its popularity in racing and commercial applications...in racing, you have very high speeds and extreme pressures/forces applied to tires (which can also cause large variations in temperature)...in commercial applications, like aircraft tires, the same thing applies...while aircraft aren't being driven around the airport at high speeds, the tires are subjected to lots of mass when landing, and large temperature differences in relatively short periods of time...for example, a jet could take off in London ON at 3pm in January where it is -30C...3 hours later, it lands in Miami where it is +30C...as well, in the summer, it can take off London where it is +30C and reach temperatures of -40C to -60C when cruising at high altitudes (30,000 to 40,000 feet), which it can likely achieve in 20 minutes.
since your regular passenger vehicle isn't subjected to such extreme conditions, it isn't as crucial or important on a car, but it is still a benefit nonetheless...it is up to you to determine if it is worth it...for me, there is no added cost, so no need to not have it done.
the reason it's used in aircraft is not due to temperatures, rather because it's not oxygen, and therefore won't combust....
there is that, but there is also plenty of oxygen in an aircraft anyway...the amount of oxygen in the tires is minute compared to the rest of the aircraft.
Sure, but the rest of the plane may not be heated to the combustion point in the case of a landing gear problem, nor would much, if any, of the oxygen on the plane be compressed (but perhaps I'm very wrong about that).
compared to the amount of "air" in a plane and around it, the minute amount in the tires is of no concern...they are far more concerned about stable inflation than combustible air in the tires...the same is the case for racing...a few tires worth of air won't make much of a difference to an aircraft, surrounded in air, and carrying thousands of gallons of jet fuel, should something happen...that doesn't mean there isn't ANY potential for a problem, but from what i have read, stable performance (predictable response) is why Nitrogen is used, NOT for anything fire related.
Nitrogen inflation in tires is gaining popularity in the light vehicle (passenger and light truck) market. Nitrogen inflation in tires is not new to the tire industry however, and has been used under severe service conditions such as in large off-road tires, aircraft tires (as fire prevention) and racing tires for many years. Nitrogen inflation does not harm tires nor does it affect the warranty.
here's an explanation of it from someone
" Nitrogen is put in plane tires for one reason only. Fire protection. The Brakes on a normal landing will get as high as 600 degrees C. The carbon brakes in the center of the hub will then heat the metal rim to near or above the flash point of rubber. Aircraft tires are from about 150psi - 200 psi at ambient temp, and the wheel wells are unpressurized.
The flash point of the tires will be reached a lot sooner on the inside of the tire than the outside of the tire if there was O2 inside the tire (around 20 percent in ambient air) under pressure. With no O2, inside the tire the chances of a tire fire are reduced dramatically.
A tire fire in flight is a VERY big deal. There are a lot of very fragile temperature sensitive things routed right next to the tires in the wheel wells.
Cheers Andrew "
More reading would suggest that the space shuttle uses it in the tires fro the same reason.
if the dealer puts nitrogen in the tires how do you know they put in nitrogen? how do you check? besides the air we breath is 75% nitrogen.. Go for an oil change and ask them to put in synthetic oil how would you know what oil they used? Trust?
as i said, there is that potential for explosion, but there is already plenty of oxygen in the aircraft as it is (if there wasn't, everyone would suffocate)...a few tires worth of air is pretty insignificant.
since you like quoted links, here:
Commercial Airlines - The Federal Aviation Administration (FAA) requires nitrogen in all commercial aircraft tires to eliminate the potential for water vapor (inherent in normal compressed air) from freezing at high altitudes. In addition, aircraft manufacturers such as Boeing use nitrogen membranes in their On-Board Inert Gas Generation Systems (OBIGGS) to "top" fuel tanks with nitrogen - an inert gas that does not support combustion.
you don't want a small puddle of water freezing into a piece of ice inside a wheel at high altitudes, as that will cause a severe tire balancing issue when it lands, which could be catastrophic...as i said, there is the potential for fire with regular air, but that isn't the main reason they use it.
Money would burn that friendship to the ground real quick. With my friends I've laid it out very simply, I can take anything, but fuck with me and money and it's over.
i had a friend of over 20yrs that did that, he's not a friend anymore. We're not talking about a 100 bucks either.
I got this very good friend that borrowed $1,500 from me because he now became a construction contractor and needed the money to complement the purchase of power tools. He told me he would pay me in 1 month when he gets his first contract done. That was in June of 2013. I have not seen a penny from him or a phone call or a visit which he used to come and visit us almost every weekend. His wife also stopped calling my wife.
My grandmother was right when she said; "Lending money to friends is buying enemies".
actually not always true.. I just finished my 5 year 0% on my Mazda Mx5..
got it at 2009, when you know, the car market was in its "crashed" mode. I was actually able to save about $7000 off the full price plus get 0% 5 year term.
i also paid like 10Gs via my CC for admin/security, which i then got 1% back on.. it was a good purchase.
You're fortunate to have found a dealer who would accept such a substantial amount from a credit card. The transaction fee alone would have eaten up most of the profit. They must have been desperate to make the sale.
I try to light it on fire. If it explodes, I start asking questions.
Hydrogen my friend, not Nitrogen. This is the difference.
I was joking about the Oxygen vs the Nitrogen. I'm aware of the difference.
back in high school, for my physics project, i had two balloons...one was full of hydrogen...the other a mix of hydrogen and just regular air (about 50/50)...i then attached a match at the end of a yard stick...my project was to show the properties of hydrogen on its own vs hydrogen and oxygen together...when bringing the lit match to the hydrogen balloon, it was rather uneventful...it popped the balloon (much like a pin prick would pop a regular balloon full of air) and there was a small flame/flash visible...the oxygen/hydrogen balloon however was much different...it made a massive boom (explosion) that scared the crap out of everyone (including me a bit, even though i knew it was going to be loud)...teachers from a few rooms over came over to see what happened as they thought there was an accident in the room.
much like this, but in a regular sized classroom instead to a gym: