Originally Posted by Beast71
Just purchased a used 27 foot bumper pull travel trailer, and I have a question about the tires on it. All 4 tires are the same size according to the numbers on the sidewall, but on the left side, both axles have the same tires with a 50psi max rating. On the right side, both axles have the same tires with a 60psi max rating. (basically, different brands on opposite sides with differing max pressures). My question is, is it ok to leave them like they are and run the max on the sidewalls, or should I balance them out by moving the 50psi max tires on the front axle, and 60 psi max on the rear axle, or something else entirely? Never towed anything of this size and weight, and want to be sure I tow as safely as possible.
First I would check the age of the tires on a used trailer. If over 4-5 years old, I would replace them. There should be a DOT label on them that will have that info. Google will get you the specifics as I don't recall.
My guess is that the right side tires with 60psi max are the most recent and are replacements after a tire blow out. Maybe there's more weight on that side, or sometimes there are just more potholes on the right side of the road. But blow outs usually mean the tires are under-inflated or too small for the weight they are carrying. So I would weigh the trailer, get the axle weights and compare that to the tires' weight ratings. I like a hefty margin in those numbers, and I've never had a blown out tire.
And if all that looks good, I would move the tires around so that each axle has the same tires. Otherwise I would think there might be some chance of side-to-side sway with different tires on each side.
Frankly, I would be concerned about having different tires and consider replacing all of them if there are any issues at all.