Originally Posted by kandl
Brigitte, those tires are sooo overkill for your Ram 1500. Max combined load capacity of these particular Michelins is 15,000 lbs @ 80 psi - that's over 8,000 lbs more than your truck's GVWR. Notwithstanding, and to answer your question, 45 psi would not be too far off the mark. You need at least that much pressure to get a E-rated tire to make a decent contact patch with the asphalt.
What happened to the Shasta?
I had very little to choose from for LT tires due to the size. I thought about changing for 17 but after researching all options, staying with the 20's seemed to better way. Wish I had known all that when I bought the TV.
Shasta was a good TT but after a few trips, we decided that the layout was wrong for us. We usually take trips lasting 5 nights or more and we got cramped (especially when we brought sister in law with us). The dinette U shaped booth dis not work at all for us! It's pretty and large but the seat on the back wall was only large enough for a child. So to watch TV, one had to sit on the bed.
All this time, we have not wanted a longer TT. We insist on not storing TT away and parking it at home. We wanted more space but not longer so we got a small 5th wheel. 25'10" total but much more space. Bathroom is smaller but leaves more room for living area. Got up pull out couch with airbed, a nice large dinette booth I can look out of (Placed on passenger side, with large picture window) and a lot more counter space.
Long story short, i was not comfortable with the original TV tires right from the get go back when I got the Shasta, but did not change right away. They were Goodyear Wrangler HP 275/60R20 and felt terribly soft even at 42psi (max 44)