Originally Posted by dasavatharam
Totally confused now....I have a air pressure manual checking machine with which I checked the pressure on all four tires. They are all showing 35...when I pumped air at the machine this morning, the machine at the petrol bunk showed 34 on all of them. TPMS shows less than 32 on all of them....so now I have three sources and which one should I trust. This should not be so difficult.
@Mukesh.......how much does the the Nitrogen filling cost and what is the procedure? can u elaborate please.
, i have been using hawk from the past 35 months.
The tyre pressure showing 35 PSI was due to the fact you were using the vehicle after filing air, which tyre expands & hence pressure in it.
Best time to fill it is in early morning, by driving slowly on humps & potholes, before reaching tyre shop.
What i do in such case is fill the tyre with 33PSI , so that when tyre gets cold the pressure remains within 32-32.5 PSI.
Go to any of reputed tyre shop,Madhu's Tyre or Sai Iyengar's get it filled with nitrogen.
I usually get it filled at Tyre professionals Basavanagudi.
The procedure is, they will deflate all the tyres,By creating vaccum they ensure all the moisture is removed for each tyre.
Then they start filling nitrogen 99.3 % Nitrogen.
Make sure that the TPMS reading shows 32 psi.
The actual correct reading understood by TPMS is after 2-3 mins of filling.
By this you can enjoy the ride on Hawk, the original advantage of Nitrogen can be felt in Summer long drives, tyre pressure remain within 34.5 psi.
Where as with normal air it may go upto 38 max.
Initial filling cost 25/ tyre.
Later topups free, i just pay the guy who fills it with 10 Rs, once in 3 & half to 4 months.