I'm running 70psi front, 80psi rear
with my minimum alarms for my TPMS at 63psi front and 72psi rear
I don't remember my exact numbers, but I think these minimums are really the targets based on my weight, and my ride would be even better there but I prefer to be sure with my safety margin. (I'm not clear as to how much safety factor michelin builds into these numbers so I just don't want to go below)
but you really should run based on your weights, as it's very bad to go low pressure
Load & Inflation Tables | Michelin Truck
and re. the extensions for inflating - Mine had braided hose extenders on them from the factory but i removed them because of leaks. I tried a few different chucks and found that it is possible to do them with a straight chuck, but I just couldn't put the dust caps on. I have some rigid extenders but i haven't had a chance to try them yet
Thor Forums
