I've filled in nitrogen in my new Michelin XM1 tires.
I feel nitrogen doesnt heat the tires as much as regular air does...
I also heard that the pressure remains constant for as much as 6 months, as nitrogen is less volatile than free air... but i may beg to differ....
here's why....
i got these mich's in november... all 4 tires filled with nitrogen and the spare JK tubetype also filled with nitrogen...
Yesterday i went for a top-up of nitrogen as i felt one of the tires looked underinflated (front Left tire). And it was... 5 psi less... FR tire - 2-3 psi less.... Spare tire had no change in psi whatsoever....
Surprising....
the other tubeless tires also were down by a psi or two... i must admit that i hadn't used the car for 2 weeks.... but then.. we dont use the spare regularly so why the leakage only from the tubeless?
now for experts... is it recommended to check every month like we normally do? or we just let is be cos it's got nitrogen?
P.S. also if i have a puncture... how many days does it take for the tubeless to go completely or almost flat...???