Axle and tire?

Yes, the manufacturers do allow for pin wt carrying part of the load. You don't mention the brand name tires that you've had issues with. There are better designed ST tires out there, that likely will give better service.

IMO, load range E should be a good choice, while inflated to handle a full load. To ME, this is better than going to a heavy higher rated tire, then need to lower pressure, causing more heat, or tire scrub.

Take a look at the newer improved, higher speed rated ST tires, such as GY Endurance, Provider, or Carlisle HD, which are nylon wrapped, higher speed rated, and a better choice than most ST tires.

Jerry

12,275-20% pin weight is 9,820, so your axles and tires aren’t underrated. You may want to weigh your trailer though. It’s easy for them to gain weight over time through mods and repairs. Overloading them is easy, especially with full tanks.

GY Endurance made in USA is what I have after 2 Westlake tires blew that were 3 years old with 5k miles.

Better yet go to LT tires and forget the blowout special ST. We have tens of thousands of miles on our GR Commercial TA LT tires. Not one tire issue

tntcrock wrote:
I have a 2006 Montana Mountaineer that has GVWR of 12275lbs but has 6lug 5200lb axles. This doesn't seem right to me but I guess they deduct some for pin weight. It came with Load E tires but I've had blowouts and thinking of going up to load F or G. I'm tired of tire issues and damage. I'm fanatic about tire condition and psi, I'm always on top of it. Last blowout tire was less than 2 years old. I've also had a new set all roll the belts and have to be replaced within a year, probably one trip on them, they bulged out in middle tread.

Yes, manufacturer expects some of the weight to be on 5th wheel. (People say pin, but that is nonsense)
Now do you understand when it comes to parts, even tires failing the weight ratings does not mean more than a pinch of snot unless you can compare to the actual weight?
Put it on scale, then can have a rational discussion.

agesilaus wrote:
Better yet go to LT tires and forget the blowout special ST. We have tens of thousands of miles on our GR Commercial TA LT tires. Not one tire issue

X2
Our 2005 Ccopper Canyon 293 FWSLS came with 5,200# axles, and LT235/85-16E tires. Put a good set of LT tires on it and be happy.

Weigh your trailer, it's heavier than you think. Are you towing level? If not it puts additional load on the axle that is carrying more weight.

Had problem with the Hercules ST's, currently what I have on about 3 years old.
I ran Firestone LT's, I didn't like them; sidewalls seemed softer with more roll.
But didn't have any blowouts on them. Yes, I need to weigh trailer. Do I weigh it hooked up or unhooked? I know there's post on weighing, I'll have to look those up and get up to speed on that before going to scales.

Weigh it hooked up for accurate amount on tires/wheels. Even if unhooked, a large percent is on landing gear. You likely won't have more than 10K on the two axles.

What size tires/wheels are you running? Even 15" E-rated should be around 2,830 load.

garyp4951 wrote:
GY Endurance made in USA is what I have after 2 Westlake tires blew that were 3 years old with 5k miles.

You beat me to it!!!!!!!

YES the GY's have a stellar record. Try to find a non road hazard failure.

Put a set on my Boat Trailer Summer 2017, they are going strong with well over 25k and plenty of tread left. They do have a 87mph speed rating. OH and if it matters are US Made.