Goodyear says otherwise. Per my post on page 2 of the "bigger wheels, heavier axles" thread (at
http://www.trailmanorowners.com/foru...4&postcount=14 )
They recommend that you 'tune' your tire PSI downwards when you're running with less load than the tire max.
Who you gonna believe, the manufacturers' load/recommended pressure tables (which are dated 2005), or a dealer with a "one sentence fits everbody in all situations at all times" proclamation he probably 'learned' from his granddaddy umpteen years ago?
discounttires's page seems to keep it simple for the more stupid and careless of their customers. And maybe Carlisle and other less-known brands sell tires with different recommendations, they mention Carlise specifically at the bottom of the page. But Goodyear has obviously put a lot of thought and work into this table of recommended PSIs for their tires. (Ref the other post, above.) I feel that Trailmanor owners, especially those running with big tire/axle upgrades on small, light trailers (such as I), should pay attention.
My 2619 (with upgrades) will probably leave home about 4K lbs when I'm done overloading it and fillling the water tanks. At the 65 PSI max ratings for the tires, for which Goodyear shows a max load of almost 1100 lbs
more than I'm carrying, the poor TM would probably be riding so hard that a gazillion screws would be rattled loose in the first 10 miles.
Per Goodyear, to provide for proper tire flex and keep the TM from being shaken to bits, I'll drop the PSI to about 50. The sidewall flex characteristics which they will have @ 50 PSI under 4000 lbs load is roughly
the same as the flex characteristics they would have @65 PSI under max load (5080 lbs). And that's the whole idea... instead of running them ROCK-HARD when you have chosen tires with a big load margin, you run them AS THEY ARE DESIGNED TO BE RUN. Tires are a suspension component with an important role in softening the ride; you need to configure 'em right.