tire issues on the?

Yes, you get increased tire scrub with a triple axle trailer. I have learned to try to not turn as tight whenever possible.

Yes it's an issue, but you learn to take wider corners as you drive. The reality is that triple axle owners haven't reported major problems over the years. It can cause some premature tire wear, but I can't say I've seen frequent posts about issues from it.

Only real problem with 3 axles is 6 tires are 50% more than 4.

Our 43' TH has two heavier duty axles which is part of what attracted us to it. We full time and have put on 9,000 miles since we left "home" last August. It has 17.5" H rated tires.

On my triple axle, have never had a problem with any position tire after going to Michelin LT Ribs.

Before going to LT's, didn't matter what position the tire was on the trailer. All position ST tires would fail on my triple axle, regardless of tire position.

I don't see any difference in my LT Ribs wear comparing my middle tire to the front or rear tire on my TH. They all seem to wear the same (very little), and tow smooth and steady all the time...

Think the key here is, if you use the best grade tires, should not have any problems with a big triple.

With my bumper pull triple I don't think I can make as tight a turn as a 5th wheel. In fact I can't(or don't) turn sharp enough to cause my middle tire to be the pivot point. The trailer will always be moving a little forward or backward while turning. Thus preventing the middle tire from being in an extreme pivot point non rolling scrub only position.
I am far from a expert on this, but this has been my experience.

jmo

He thinks that would be a problem with the middle tire pivoting instead of going straight forward or backward. Tires aren't made to go sideways. Comments?

Most tri axle trailers I used to make a living had 5.2k axles or 6.k axle and a couple with 7k axles.
The Michelin XPS Rib or the Bridgestone R-250 both are a commercial grade all steel ply carcass tire in a LT235/85-16 E at 3042 lbs capacity work great on the 5k-6k axles.
I have one 36' tri axle GN stock trailer left with 7k axles. I just had 6 Sailun S637 commercial class tire with a all steel carcass in a 235/85-16 G at 3750 lb capacity put on this trailer. With my short bed Dodge/Cummins I can spin the fully loaded triaxle trailer 360 on the center axle on pavement or green grass.
The front axle tires and the rear axle tires are the ones that slide sideways (side scrub) as the trailer goes around a corner or backing much of the time. Which tires side scrub more can depend on terrain/a level trailer/etc.

Thank you for feedback. DH won't budge, so I guess it will be a regular 5th wheel if we make a change.

I have a triple axle fiver and I can tell you from my own experience it tows better with more stability than any two axle trailer I have ever had, with good tires ,have never had a tire problem, had lots of tire problems until I started using good ties, Goodyear G614, Salin 637's.

good point on the better handling.
Having owned several of both IMO the tri axle with 6 brakes was hands down superior braking at full loads over any tandem axle unit.

Another thought about triple axle trailers is the stability when parked. We have a 43' Raptor with trip axle and 6 point stabilizers. We were in a storm in Okla with 65mph side wind and couldn't feel any movement. We haven't had to replace tires yet cuz we have only owned the Beast for a year. Will I dread paying the money for 6 new upgraded tires, sure. But the stability when FT'ing it can't be beat.