I read through almost all the posts on this and the one thing no one seems
to have mentioned is Nitrogen is dry. Shop air has water in it, hence the
filters/water sumps bolted upstream from the manifolds. The only good reason
that makes sense to me to use Nitrogen would be to keep water out of the
inside of the tire which in theory would help stop the rubber from rotting
from the inside out. Whether this is a real concern remains to be seen, but
having worked with Nitrogen in the Aerospace industry the main reason it is
used is due to its lack of moisture.
Mark M.
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