Had a tire seperate. All 4 tires are wearing bad on the inside.  Not bald but just uneven on the whole tread. The tires are lopsided.  I do keep them property inflated. The tires are 3 years old.

At the Coop, where I had a valve stem replaced on one, and noticed the seperation, they said the axles might be bent.

EBY, an 05 or 06?  I think it is,with LQ.

What is the GAWR? What is your GVWR? What is the load rating/range on your tires? What does your trailer weigh fully loaded as you use it? What make are those 3 year old tires? Need more info....

If you question a bent axle.  Just take it in and have them run an alignment on the trailer.  At least you will have a computer print out showing if they are or are not bent. Then you can decide what the next step is.

When I bent mine, Took it into a tire shop that specialized in big truck tires and alignment, They put my trailer up on a big rack and checked the alignment, My axles were bent, So they put the hydaulic ram on the axles and bent them back into alignment.  Checked the alignment after they were done and gave me a print out showing what the corrections were.

Cost me $80 per axle, or $160 total for the alignment and straightening the axles. That was cheaper than the cost of one of the tires I had to replace because of the bent axles.

If you think you have a bent axle. Pay a professional shop to fix it. You don't need to guess at this.

Ditto Painted Horse's reply.

Take the trailer to an alignment shop and have it professionally evaluated. If the tires are wearing on the inside, you have too much negative camber or an excessive amount of toe out. Because the axles are non adjustable, the probable cause is that they are bent.

I had a trailer tire wearing on the inside edge.  A semi-trailer shop aligned the wheels by bending the axle.

This link is a procedure to check your axles at home.  It is just a screening procedure.  I wouln't try to align my trailer axles with this.  Too crude for my trailer.  tire sidewalls aren't precison. There'll be lumps & bumps from the tire plies... Just a check.

http://www.centrevilletrailer.com/news-notices/trailer-tire-problems-tips.htm

That's exactly what we did to get the rough idea that I needed to go to an alignment shop. Put a good straight edge across the tires.  Once in the shop they attached the lazers to the wheels to get a true alignment.

Just call around and talk to a couple of alignment shops. Find one that has a rack large enough to get your trailer on and who has the hydraulic presses to push or shove the axle. 

Understand that the axles are non-adjustable,.  So what they do is litterally bend them a new direction to compensate for the original problem.  This may dimple or dent the axle, So it's not a procedure that can be repeated unlimited number of times.  You may get away with one or two repairs then need to replace the axle at some future repair.

Thanks for the link to Centreville trailer.  I have been past this place a trillion times.  Sometimes a tight turn just can't be avoided.

For what it is worth, most of the time your horse trailer axle will be a torsion axle. When they are out of alignment it will be because of a bent spindle or swing arm. What is being suggested here to align them requires bending the axle beam. So in effect we are not correcting the original problem, but rather creating another "problem" so that the two wrongs look right on the alignment printout.

I have personally aligned many trucks and this includes bending the axle (intentionally!). But the axles that we "corrected" were "straight" axles and we were generally able to bend in the area of the original issue. I personally would never advise bending a torsion axle under any conditions.  We have the equipment in our facility to do so, but your safety and the safety of my family driving beside you, will not allow me to do it. In fact the largest axle manufacturer Dexter, does not approve of bending their torsion products. Just my.02$.

My bet is that they are Dexters. Have you weighed your fully loaded trailer?

We run our 4H/12' LQ at 85-90% of rated axle capacity 90% of the time. With 4 horses, hay, water, etc, it is pretty easy to get there.

We see even wear on the inside of all 4 tires. Back tires wear just a touch more than front ones for some reason. I rotate 2x a year, and turned them inside to outside last spring. They currently have ~30k on them and it will probably be the last summer for them this year.

I wonder what rated capacity do they run true to the road at? I looked thru Dexter's site and could not find anything. With the Torsion Axle, the camber does change due to load....I really think we are under axled at this much capacity and tires seem to show it. I wonder if this is the OP issue?

Never been a fan of "aligning trailer axles" as have tried it several times on other trailers and didn't solve any problems.

Anyone see similar issues? 

I  have a call into EBY and if I don't hear back from them soon, I will call again.  I asked about putting a heavier axle in, and they said that there will not be enough clearance for that? I

I have also contacted a shop and will be taking the trailer there right after Christmas.  He kinda indicated that the aligning was like a " hit or miss " thing? Not a long term solution maybe?

Pehaps new axles are in the cards?

Yes fixing the alignment is a hit or miss.  But for the $80 gamble, I think it was worth it.

At least after putting the laser on the wheels you will know for sure you had an axle problem vs just guessing and spend $1600-$2000 for new axles that you might not need.

But doesn't the camber change when loaded? Unless you take in the trailer loaded like it will be most of the time, they could not put enough angle on the tire to solve the problem. How would they know the deflection of the tire when loaded if you take it in empty?

Not an expert but wanting to learn as tires are getting really expensive.

  I asked early on in this thread what are the axle weight ratings, GVWR of the trailer and what does the trailer weigh loaded, I didn't see your response.... If the axles happen to be overloaded, there's not much need to try to straighten anything.