I just want to clear the AIR about the misconception about using Nitrogen air on tires...
As some has pointed out... Normal air contains 78% of Nitrogen, while the remaining 22% is mixture of gas (21% Oxygen and the rest is CO2, Neon, Argon & etc)Nitrogen molecule is much larger than others air molecule hence its much harder for them to seep through the tiny pore of the tire membrane as well as the gab between the tire & the rim. So what does this mean? Those whom using Nitrogen gas are less likely to loose tire pressure over time (maybe 1-2 psi over 6 months period) compare to those on normal air... they will loose about 1-2 psi every 4-6 weeks. (This is a fact because I tried using Nitrogen for 2 years straight on my ride and that is my observation)
For those whom claims that it give you better performance and prolong your tire life.... I wont say anything to them except giving them the 'middle finger'

Racing team used PURE Nitrogen in their tire is not for performance gain... but its maintain their tire pressure through out the race. (Heat caused the normal air to expand hence PSI increased)
On normal road car.... you can hardly get your tires to reach those extreme tire temperature. Unless you're hardcore driver whom drive very fast on winding road and long distance. Event if you does, the tire pressure would only increased 2-3 psi (not high enough to jeopardize the tire life or car handling)
So the conclusion.... this is a sham? Yes & No... (Depends on how you look at it) because the ONLY benefits I see is that the tire pressure maintain much longer than normal air.
Would I recommend it? My answer is yes if you're the type of person whom is lazy/hardly check your tire pressure regularly. Else... stick with normal air as normal air is FREE!
If you does choose to go Nitrogen.... Make sure the tire shop fill & purge the nitrogen air several times in succession so that you get close as 92% or higher to be effective...
This post has been edited by rocketeer_ace: Feb 11 2020, 02:00 PM