Nitrogen filled tires.

by James
(Apple Valley, CA, USA)

I recently purchased new tires for my vehicle. They are the same size as the original tires. The company I purchased them at also installed them. They filled each tire with nitrogen. They were filled to 35 psi. The vehicle's recommendation is 29 psi. Why the difference?

Comment:

This is really a question you should be asking the person who did the installation to learn if there was some special reason for making the change.

Normally, when tires are mounted they are over-inflated o force the bead to seat firmly against the rims, then the pressure is reduced to the desired operating level.

In your case, it may be that the operator may not have reduced the pressure sufficiently to reach the recommended pressure level, or he may have had some reason to use a higher level. Under normal circumstances nitrogen pressure and normal air pressure should be the same.

TG