[Rick Bailey]

Being a retired UPS mechanic and seeing my fair share of trl bearings ....going to Timken is a great move.
Then get you a temp gun... and after an hour or so of towing pull over , in a safe area of course .... shoot the temp of all tire tread surface and side wall and then shoot the hubs ... record all info and then analyze .... This can tell you a lot about your load placement and maybe where to move the load around to equalize temps and weight on each tire.
you can also test with an empty trailer to see the big picture !

Hope this helps !

Rick