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Old 08-09-2013, 10:14 PM   #15
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"OK, perhaps I am over-thinking all this... I'm upgrading my tires & wheels to 16 inch Sendels with Michelin LTX M/S2 tires 225/75-16E's. I've ordered the Dill TPMS system from Tirerack.com."

And the objective evidence for the above upgrades was.....?

The objective reality....the product works.

Bob
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Old 08-10-2013, 05:17 AM   #16
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There is some "school of thought" that the beads wear away at the inner core of the tire an weakening it over time. Don't know if that's true, but..... that being said I do use beads in the tiny tires/wheels of my scooter where I can't find a balancing machine or centramitcs for the application.
It is my understanding that the beads are used mainly by over the road truckers, so I do not think they hurt the tires to any degree.
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Old 08-10-2013, 06:57 AM   #17
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Maybe we need to come up with a way to spin the tires and observe the vibration that way. When you get them up to 70 mph your going to know if there is much vibration. I will give this some thought. Maybe a drill motor with some sort of rubber tire on it to spin up the trailer wheel.

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Old 08-10-2013, 07:28 AM   #18
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It is my understanding that the beads are used mainly by over the road truckers, so I do not think they hurt the tires to any degree.
I suspect you are correct....just something I read on the "internets".
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Old 08-10-2013, 08:18 AM   #19
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Anyone use beads in their trailer tires?

Same principle as Centramatic, what's wrong/right with them?

doug k
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Old 08-10-2013, 08:22 AM   #20
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Anyone use beads in their trailer tires?

Same principle as Centramatic, what's wrong/right with them?

doug k
Nothing that I can see, except the comment above....valid or not????

I do hear that if there is moisture in the tire, the beads can stick in place. But this comment was for motorcycles which have really small beads...like 1mm in diameter. I think the auto/truck beads are larger and less prone to sticking in the tire bead area and with moisture present.
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Old 08-10-2013, 08:40 AM   #21
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Just fuel for the fire:

Centramatic Automatic Wheel Balancers Demonstration - YouTube

I note with great interest that this video is supposed to show how effective the product is.

If you look at the 25 to 30 second mark, the tire and wheel assembly is spun and the amount of vibration of the un-corrected assembly can be noted. Pay particular attention to the little red bar with the nut on it the appears below the tire.

Then look at the 2:25 to 2:30 time mark where the assembly has been purposely made off balance and the Centramatics installed. Please note that same red bar with the nut on it vibrating - and much worse than at the 30 second mark. So in spite of the voice over saying it is in perfect balance, it's actually worse than the undisturbed condition.

Word to the wise: Be very careful about accepting these claims at face value.
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Old 08-10-2013, 09:17 AM   #22
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Capri,

While I definitely see what you see, it totally bamboozles me why they would use a tire and wheel manufactured for walking speed with virtually zero of the manufacturing tolerances of a road tire/wheel AND an apparently home made stand with who knows what kind of motor AND a mock up product with plastic tubing. It seems to me, they should use an actual quality, full size tire and wheel manufactured and engineered for passenger road use and mount it on a precision balancing machine and use an actual production Centramatic product.

I can tell you it was the only thing, after EXTENSIVE diagnosis and repair attempts that eliminated a vibration on a van I had back in the early 90s.

Related....My scooter used to literally almost jump off the floor while on the center stand, until I put Dynabeads in the tires. Smooth as silk now when running the throttle up while on the center stand.
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Old 08-10-2013, 10:02 AM   #23
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Quote:
Originally Posted by ROBERT CROSS View Post
"OK, perhaps I am over-thinking all this... I'm upgrading my tires & wheels to 16 inch Sendels with Michelin LTX M/S2 tires 225/75-16E's. I've ordered the Dill TPMS system from Tirerack.com."

And the objective evidence for the above upgrades was.....?

The objective reality....the product works.

Bob
Hi Bob,

Yes, I have spent a lot of money now based on what amounts to mostly anecdotal (but quite alarming) reports of ST tire failures on Airstream trailers. I would have simply replaced my 15 inch tires with an equivalent load Michelin LT tire but they don't make them in 15 inch. (XL P tires are not rated for a high enough load IMHO.) So, to preserve some load capacity in what should be a more robust LT tire I have had to move up to a 16 inch rim & LTE tire. I do not have good statistics to support this decision as the helpful, but not truly definitive, tire survey by Phoenix does not include a denominator in the failure column. (It can't). We have no way to know whether the lack of reports of Michelin LT tire failures is simply due to the relatively lower usage of these tires on Airstreams...

Nevertheless, there are enough reports of catastrophic LT tire blowouts on this forum alone that I am pretty sure that I will have a more reliable setup by going with the 16 inch LT Michelins.

I have ordered a TPMS system so that I can hopefully catch a leaking tire or overheating wheel before it fails. That can't hurt either - I don't think.

As for the Centramatic question though... I am aware that some folks feel that the contents of their A/S trailer are less disturbed and tire wear is less noticeable since putting on Centramatics; but, to date, I have not seen any sort of objective comparative to show that the Centramatics provide any meaningful benefit to the ride or wear of the A/S or its components.

BTW: The only objective test I could find online was a test using truck tires on a commercial Highway Rig in 110F heat with ~15% reduction in steer tire temperature using Centramatics vs the standard balanced tires. They probably do work but do they provide meaningful improvement for the Airstream trailer setup?

I started this thread in the hope that maybe someone, somewhere may have attempted to measure vibration, shake etc. before and after a Centramatics installation on an Airstream. So far, it doesn't look like it.

(The Dynabeads option is intriguing but even if they do work on a wider tire (i.e. non-motorcycle tire) I don't know that they would be compatible with the in-tire TPMS hardware.)

Interesting discussion though.

I appreciate the wisdom & experience of the collected voices on this forum.

cheers...

-evan
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Old 08-10-2013, 10:39 AM   #24
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Question Golf balls...

Lets find this guy and see how this worked out for him.....
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Old 08-10-2013, 10:49 AM   #25
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Go to Dynabead's website. They address all your questions.
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Old 08-10-2013, 01:11 PM   #26
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Go to Dynabead's website. They address all your questions.
Thanks.

Good info there. It would be nice if there were some sort of controlled objective tests by neutral 3rd parties to corroborate the Dynabead/Centramatic claims.

-evan
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Old 08-10-2013, 02:17 PM   #27
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I ran the beads in some 315-70-17 BFGs for a while. They seemed to balance OK, but were a mess when you picked up a nail and needed a flat fixed. You always lost some when the tire was broken down, so you had better have some reserve beads. The tire tech was none too pleased having to deal with that mess either.
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Old 08-10-2013, 04:49 PM   #28
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It would be nice if there were some sort of controlled objective tests by neutral 3rd parties to corroborate the Dynabead/Centramatic claims.
Nice, yes. Probable? No, unless somebody provides the money.

Tim
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