Probably worth re-posting this link again:
http://www.trailmanorowners.com/foru...ad.php?t=14067
Joseph, you're running the equivalent of a light truck (LT) tire on your 2720. There are pluses and minuses to those over a special trailer (ST) tire. I would encourage you to read the "best practices" in the above link. The most generous load rating that I can find for the the TR645 is 2,094 lbs. per wheel. The more typical range for a load rating of 104 is just under 2,000 lbs. If we just call it 2,000, that probably puts them at or over their limit if you load your 2720 with the normal stuff that we all take when we're camping.
Because LT tires do not have as strong sidewalls as ST tires, overloading them increases the chances of a sidewall failure. Having been there, I can tell you that a sidewall failure is both sudden and dramatic. On a single axle trailer at high speeds, it could be catastrophic.
Dave