I just had new tires put on my class C. The new tires seam to have a bit more flex on the sidewalls then the old ones. The tires say max pressure 80psi for load range E. But the sticker in side the dr...
Part of the reason to run the front tires at only the pressure required for the load (again, 65PSI on E450) is to provide a Contact Patch (where Rubber Meets Road) that allows for steering control. You want your front tires to care which way they're going, to want to go straight. You're fine at 65 front, and very probably less. As noted above, many of us have replaced lower load range tires with Range E, and kept the pressure to the rating of their axles, coaches, wheels.