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Old 07-18-2016, 09:41 AM   #29
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Fair enough, but the OP seemed to think that tires leaving the ground and slamming back down were the cause of his tire issues, with which I disagree. [edit -- OP: "bad shocks don't keep tire on pavement . . . constant bouncing . . . "]

My wording was not great, but the real cause of the damage is not from bad shocks IMO.

Curious to know your best guess about his tire damage . . .


Quote:
Originally Posted by Action View Post
The tires don't have to leave the ground with air under them for a tire to loose control or grip on the road surface. All they have to do is unload enough in a moment that the tire looses grip and then full force comes back down.

The job of a shock is to restrict that movement and the restriction only has to be momentarily as a new force will come in the next moment.

>>>>>>>>>>Action
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Old 07-18-2016, 09:55 AM   #30
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Give it the Chaco Canyon shock test...

Try either the south or north routes into and out of Chaco Canyon.

If you are lucky enough to have THREE tow vehicle tires on the ground at one time and at least TWO tires of the Airstream on terra firma... while traveling sideways, it is a great test for those 'bicycle shocks' on an Airstream.

Also it helps if you have a mouth guard to prevent any permanent damage to your teeth... in the process that seems to be never ending.
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Old 07-18-2016, 10:01 AM   #31
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My point is the OP did not use the words "leaving the ground."

The statement made was, "when bad shocks don't keep the tire on the pavement" The tires do not have to leave the pavement to keep the tires in CONTACT with the pavement. That may be splitting hairs however any time the tire is not in contact with the pavement there is loss of control. When the tire regains control it is usually done in a very forceful way. Under speed that force repeatedly can do damage to a tire.

The same can be said for a slow speed maneuver when a multi axle trailer is taking a sharp turn. The tire(s) that slides is not in total contact with the pavement.

As to the possible causes of this poster's issue, I believe it may be some or all of the items posted above. IMO
Assembly Balance
Weak shocks - The unit is 8 years old
And I would add improper inflation and/or tires that are not correct for the load.

>>>>>>>>>>>Action
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Old 07-18-2016, 11:24 AM   #32
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Here's some better lighting.


These are E-load Michelin LTX, inflated to 75psi. Wheels are balanced, and Centramtics. Installed 4/11/2012, have almost exactly 24,000 miles on them. Action's right, the shocks are original. Took possession 10/2007. 54,550 miles on trailer, to date.

Always CAT, and Sherline, so I know it's not an overload issue.

Was calling around this morning to try and have a shop true/shave them up before I replace the shocks. I guess that's a specialty most franchises don't offer. But, even if I can't get them trued, I won't be replacing them.

At this point, if I assume the shocks are bad, the only other thing that needs checking is alignment.

I'm surprised nobody else has ever seen this on a trailer...
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Old 07-18-2016, 11:39 AM   #33
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If you balance & rotate the tires that wear pattern will be interrupted, after the issue is addressed.

One of the neat things about rubber torsion spring axles is the amount of "wheel hop" that is induced. Or lack of wheel hop. This spring type tends to "hop" less than metal springs. However when large amounts of load are applied to any suspension system at fast speeds the negative issues are magnified. Shocks will only dampen the movement. To eliminate of some of the movement is addressed with balancing tire/wheel/hub assemblies. Centramatics will pick up the difference as the tire wears or if the hub was not balanced. My understanding is they will not correct gross out of balance conditions. However I have very little experience with the product. The whole suspension system works as a unit. Some times it is one component and other times is more than one in less than good condition.

BTW over inflation can be almost as bad as under inflation. (Not saying that is YOUR issue) Knowing the towed load and proper inflation for that load is the ideal.

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Old 07-18-2016, 12:00 PM   #34
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Quote:
Originally Posted by boondockdad View Post
. . .
I'm surprised nobody else has ever seen this on a trailer...
Thanks, a much better image. Is this uniform on all four tires?

Is it possible that one (or more) wheel drums are not up to par, and cause the brakes to grab every so often (on a microscopic level) thereby causing the irregular tire wear?

Have you inspected all four wheel drums and brakes recently, for unusual wear or appearance?

Is your tire dealer nearby, or any Michelin dealer for that matter, and have you received any feedback from this arena?
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Old 07-18-2016, 12:04 PM   #35
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Quote:
Originally Posted by Action View Post
My point is the OP did not use the words "leaving the ground."

The statement made was, "when bad shocks don't keep the tire on the pavement"
. . .
That may be splitting hairs
. . .
Ya think?



Quote:
Originally Posted by OTRA15 View Post
. . .
My wording was not great, but the real cause of the damage is not from bad shocks IMO.
. . .

Replace the old original shocks to start IMO.
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Old 04-15-2017, 07:02 AM   #36
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Quote:
Originally Posted by boondockdad View Post
Here's some better lighting.


These are E-load Michelin LTX, inflated to 75psi. Wheels are balanced, and Centramtics. Installed 4/11/2012, have almost exactly 24,000 miles on them. Action's right, the shocks are original. Took possession 10/2007. 54,550 miles on trailer, to date.

Always CAT, and Sherline, so I know it's not an overload issue.

Was calling around this morning to try and have a shop true/shave them up before I replace the shocks. I guess that's a specialty most franchises don't offer. But, even if I can't get them trued, I won't be replacing them.

At this point, if I assume the shocks are bad, the only other thing that needs checking is alignment.

I'm surprised nobody else has ever seen this on a trailer...
Were all tires wearing like this one? Any update?
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Old 04-17-2017, 04:09 PM   #37
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Yep, all four tires and they all had pretty much the same "wear".

Note: my previous GYM, and Maxxis' never wore like this. They exploded and caused massive headaches and $20,000 worth of damage, but they never wore funny.

So, here's the dates and odometer readings:

04/11/2014 30,650 Michelin LTX M/S 22575R16 and Sendel T02 balanced and installed.
04/11/2016 53,400 Installed Centramatics.
08/11/2016 54,789 Same side rotated tires.
04/17/2017 56,565

It's raining pretty good right now, so I'll post a pic later. Hard to say if the tread is wearing evenly, now. I'll let you be the judge.
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Old 04-19-2017, 06:14 PM   #38
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Here they are
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Old 04-23-2017, 03:57 PM   #39
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at first glance it appears to be misaligned axles.. have they been check just to make sure that is not part of the issue. the wear does look odd for sure.

be interesting to find out what the issue is for tire to wear like that.


Quote:
Originally Posted by boondockdad View Post
Yep, all four tires and they all had pretty much the same "wear".

Note: my previous GYM, and Maxxis' never wore like this. They exploded and caused massive headaches and $20,000 worth of damage, but they never wore funny.

So, here's the dates and odometer readings:

04/11/2014 30,650 Michelin LTX M/S 22575R16 and Sendel T02 balanced and installed.
04/11/2016 53,400 Installed Centramatics.
08/11/2016 54,789 Same side rotated tires.
04/17/2017 56,565

It's raining pretty good right now, so I'll post a pic later. Hard to say if the tread is wearing evenly, now. I'll let you be the judge.
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