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Old 07-30-2013, 08:27 PM   #1
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Abnormal tire wear, cause?? Help needed.

Hi, all. I am having a problem with accellerated and asymmetric wear on my streetside tires. These are 2 yo GYMs worn out at 16k miles. The front tire is through the tread on the inside of the tire, while the rear is down to the cord on the outside. The curbside tires still have 7/32 in of tread all round. The bearings are properly adjusted without slop and run cool. I think I have a problem with alignment, but how do I diagnose and adjust this? Help!!
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Old 07-30-2013, 08:38 PM   #2
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It doesn't sound like you have an alignment issue as much as a camber problem.

I would start by jacking up the trailer on the street side and make absolutely sure that the axle mounts aren't loose, and that the axles are seated completely down into the notch in the frame that the axles seat into. Next, inspect the other side for the same.
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Old 07-30-2013, 09:01 PM   #3
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[QUOTE=Belegedhel;1333768]It doesn't sound like you have an alignment issue as much as a camber problem.

Camber is an alignment problem. Have you ran over anything with that side of the trailer?Sounds like both axles might be bent.Each axle works independent of the other so you have an issue affecting both axles. The best thing to do would be to find an independent alignment shop that could get the trailer on the rack and check the alignment on both axles. Check for toe, and camber problems.Also check the caster however caster doesn't cause tire wear it just make it handle horrible. They shouldn't be out if something is not loose or bent, but the axles can be bent to realign them just make sure they don't apply heat to them.
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Old 07-31-2013, 07:37 AM   #4
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Quote:
Originally Posted by rbr View Post
Hi, all. I am having a problem with accellerated and asymmetric wear on my streetside tires. These are 2 yo GYMs worn out at 16k miles. The front tire is through the tread on the inside of the tire, while the rear is down to the cord on the outside. The curbside tires still have 7/32 in of tread all round. The bearings are properly adjusted without slop and run cool. I think I have a problem with alignment, but how do I diagnose and adjust this? Help!!
Key points: Driver side tires, front inside, rear outside.

This sounds like the axles aren't a parallel. But that should result in the other side tires doing the opposite.

So I would look for a bent axle or something else causing the trailer not to track straight.

Oh and a misaligned tow vehicle can cause the trailer not to track straight!
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Old 07-31-2013, 08:41 AM   #5
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I think I have a problem with alignment, but how do I diagnose and adjust this? Help!!
Diagnosis:
1 - Measure on both sides, the distance between the front and rear axles. Should be the same on both sides.
2 - Measure, diagonally from a point on the centerlines (near the hitch socket is a good spot) to the front axles on both sides. Measurement should be the same on each side.
3- Do the same as (2) for the rear axles.
4 - Measure from axles to axle on the diagonal, left front to right rear, and vice versa. Measurements should be the same.

Based on the description of the symptoms, my guess is:
Measurement 1, distance on the street side is shorter than on the curb side.
Measurement 2, distance on the street side is longer than on the curb side.
Measurement 3, distance on the street side is shorter than on the curb side.
Measurement 4, distance diagonally left front to right rear is nearly the same as left rear to right front.

When all of the measurements are symmetrical, your alignment should be good.

Weigh the trailer by tire. When the load is leveled from side to side on each axle (left front weight = right front weight, etc., as close as you can get), then also check the distance from axle to frame on all four tires. If you're parked on a level surface, all four distances should be the same. If they're not, that could indicate a bent axle, or worn shocks, or metal-fatigued springs. If you can't get the load leveled from side to side to begin with, then my guess would be the left side is heavier.
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Old 08-06-2013, 05:41 PM   #6
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Similar but different problem

As luck would have it I was just today adjusting the brakes on my trailer and noticed some very uneven wear with my tires. My tires are Signet Express ST Load Range E tires purchased in October of 2011 and have approx 4,000 miles on them.

First of all I know many would not buy E tires for travel. The were recommended as I needed to get it home where it was going to be sitting for almost a year while I worked on it. They should have been a harder tire for longer wear.

Three of the four tires are perfect and I can not tell any difference in the wear pattern on any of them. The curb side front tire is very worn on the inside. I have attached a photo of the two tires off the curb side the one on the right is the front tire and the one on the left is the rear. Both are in the same track orientation (inside to the left,outside to the right)

I have not attempted to do all the measurements at this moment as my driveway is gravel and most definitely not level. I did swap the front for the rear on the same side just to keep from wearing the one tire out completely when I take it out this weekend. I am curious how one wheel would be so out of alignment and have such extreme wear on the inside only. Any suggestions would be helpful.
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Old 08-06-2013, 06:23 PM   #7
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Hi, Chillpoints; I would say that this tire is "toed out" and that would cause the tire to be worn on the inside working it's way out. Therefore worn on an angle.


For the original poster, He seems to have one toed out and the other toed in. Maybe he made a right turn too sharp and forced his tires against the curb or something and bending his axles. [only a guess, I wasn't there]
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Old 08-06-2013, 07:19 PM   #8
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Is it possible that you have a couple of broken belts in your tires? Look at post #37 on page 3 by Tireman9 in this other thread. It may be the same issue, think about it anyway.

http://www.airforums.com/forums/f438...-107328-3.html
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Old 08-06-2013, 08:17 PM   #9
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Always have had ugly toes

Quote:
Originally Posted by ROBERTSUNRUS View Post
Hi, Chillpoints; I would say that this tire is "toed out" and that would cause the tire to be worn on the inside working it's way out. Therefore worn on an angle.
So do you have suggestions as to how to adjust the toe on one foot... I mean wheel? I am afraid you are going to say replace the axle.

I do not see the caster and camper adjustments on these trailers let alone a toe in our out adjustment.

Thanks for any help possible
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Old 08-06-2013, 09:29 PM   #10
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[QUOTE=ROBERTSUNRUS;1336901] Hi, Chillpoints; I would say that this tire is "toed out" and that would cause the tire to be worn on the inside working it's way out. Therefore worn on an angle.


Not a toe problem.Toe will feather the tire all the way across the tread. Looks like a camber problem. Camber is when the top of the tire is is either in or out in relation to the bottom of the tire, therefore you get wear on the inside or out side of a tire depending on whether it is negative or positive camber.Toe is the relation of the front of the tread in relation to the rear of the tread so therefore it scuffs the tread all the way across the face of the tread. There are a few things to check such as your bearings, shocks,and make sure all axle bolt are tight and nothing on the frame or axle is loose or cracked (all of these are not very likely). I would guess a bent axle as my first guess. Either do all the measurements as described above or the most reliable would be to find an independent alignment shop that could get it on their alignment rack and check all the critical measurements for you.
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Old 08-06-2013, 09:33 PM   #11
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Quote:
Originally Posted by Chillpoints View Post
So do you have suggestions as to how to adjust the toe on one foot... I mean wheel? I am afraid you are going to say replace the axle.

I do not see the caster and camper adjustments on these trailers let alone a toe in our out adjustment.

Thanks for any help possible
There is not an "adjustment" you can do at home. An alignment shop may be able to bend the axle back into adjustment just make sure they don't put heat on it to bend it. It will depend on how bad it is out. Bad news is you might have to replace the axle. Good luck!
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Old 08-07-2013, 12:33 AM   #12
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Quote:
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So do you have suggestions as to how to adjust the toe on one foot... I mean wheel? I am afraid you are going to say replace the axle.

I do not see the caster and camber adjustments on these trailers let alone a toe in our out adjustment.

Thanks for any help possible
Hi, there are no adjustments for toe and camber this has to be done by bending the axle. Caster is an axis [king pin] angle and these do not have that; The trailing arm type suspension creates a caster effect. Someone jacking up your trailer [by the axle tube] to change tires or do a bearing repack could also create this problem.
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Old 08-07-2013, 05:32 AM   #13
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Originally Posted by idroba View Post
Is it possible that you have a couple of broken belts in your tires? Look at post #37 on page 3 by Tireman9 in this other thread. It may be the same issue, think about it anyway.

http://www.airforums.com/forums/f438...-107328-3.html
Sorry, but the tire in this thread is an alignment issue, not a tire problem. This wear pattern is 360į around the tire on one rib. A tire problem would have an isolated wear spot about 8" long, just off one of the outermost ribs.

Also, I don't like the term "broken belt" as that seems to be describing something that isn't there. The best term would be "belt leaving belt separation", but I'll settle for "tread separation".
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Old 08-07-2013, 07:33 AM   #14
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Quote:
Originally Posted by ROBERTSUNRUS View Post
Hi, there are no adjustments for toe and camber this has to be done by bending the axle. Caster is an axis [king pin] angle and these do not have that; The trailing arm type suspension creates a caster effect. Someone jacking up your trailer [by the axle tube] to change tires or do a bearing repack could also create this problem.
Caster does not wear tires it is what causes your vehicle to track straight. Robert is right in that the trailing arm type axle has the caster built in. I disagree about jacking up the axle could have caused this because if you jack the tt up with the axle and it bends it will bend up which would cause the top of the tire to lean out thus creating a positive camber on the tire. The inside of the tire is worn out on tire so it has negative camber. Most likely from a curb hit or a pothole or some other obstruction in the road that was hit.
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