I have Power King Towmax ST 225/75R15 D rateds (yep, Chinese bombs manufactured in late April of 2011) on the 29' 5'er we just bought. They're 2540# each, but my Cougar XLite has a GVW of just under 7,000 dry. The treads passed the penny test and have less than 8,000 miles on them, so I'm trying to get through this season and replace them with LTs next spring.
We're leaving for a 2 week vacation that will add about 1,200 miles round trip. Am I good running them right at the 65 psi (measured in the morning, of course) they're rated for or should I go a little lower since I'm towing light. I tow with tanks empty and though I haven't weighed it, I'd be surprised if we're over 8K pounds with payload.