I have a 2005 Southwind 37c that had Goodyear G670 2.45/70 R 19.5 load range g. I replaced them with Michelins same size but load range h. They seem to ride much harsher with the same pressures 95 fro...
IMHO, your going to have to experiment with tire pressures! My Michelin manual said 85 lbs. rear and 90 lbs. front. That did not work for me, rear tire squirm and the lower tire pressure that you use causes more tire heat and that's on Michelins website! I ended up going 100 psi all around and that is what worked for me after using different tire pressures!