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Old 05-24-2014, 10:39 AM   #29
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Even though a XL tire is built better than a ST tire I would still use a LT tire.
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Old 05-24-2014, 11:00 AM   #30
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Originally Posted by pappy19 View Post
Speaking of tires and changing them out, I really want to recommend that every AS owner with 2 axles should consider the Trailer Aid as shown below. It is worth it's weight in gold, IMHO. Forget jacking your AS, just drive on the Trailer Aid and there you are.

Trailer Aid - Free Shipping on Orders Over $99 at Genuine Hotrod Hardware
Is there an advantage to this over using Lynx levelers which can be used for changing tires and also used as pads for stabilizers and/or to level a trailer side to side on an unlevel campsite?

Just wondering. I have used Lynx levelers many times for removing wheels when servicing my wheel bearings - quick and easy to use. and don't take up a have amount of space when stored.

Brian.
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Old 05-24-2014, 05:13 PM   #31
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Michelin 16 tire psi

Last June I swapped out my Goodyears at the factory for 16" Michelin's. They pulled them off a pallet mounted and ready to go. When I inquired about what tire pressure to use it stumped them. They are shipped to them at 72 psi and beyond that it up to you to figure out what is right for your trailer.

I related that story to the AS customer service person at the region 8 rally and he was not a happy camper. He directed me to the Michelin "RV" pressure chart and there I found my tire and at Max trailer weight and it should be 50-55 lbs. On other threads on this topic people from last fall time frame claim the factory was telling them 80 psi (tire wall max) and on this thread I have seen 75psi being used.

Two things learned: Michelin lists this tire on tire pressure chart on their web site titled "Inflation Charts for RV usage Only" (in my mind an implicit OK to use on a trailer). Second: Recommended pressure is way under what every one seems to be running at as related by many in this forum.

I am leaving on a 4000 mile trip and will be dropping psi from 72 to 64.
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Old 05-24-2014, 06:13 PM   #32
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The key is unless you weigh your trailer, with gear and fluids, you really are approximating what the proper inflation pressure should be. No one wants the liability of under inflating your tires so it's no surprise what your tires were inflated to.

The question in my mind is when you have tires with high load capacities and you don't have a high load. I've always wondered whether there is a point of diminishing returns where the tire might be too low in pressure based on its design and tread contact with the ground.

Inflation is not an issue with me because I carry between 8,400 to 9,100 lbs dependent upon if I am carrying full water tanks. I run 78-80 psi in my 16" Michelin's.

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Old 05-25-2014, 09:00 AM   #33
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Gee, in just 24 hours, there's been so much activity in this thread, and so much to comment on.

First, the issue of Michelin swapping out the tires: It occurs to me that Bud (paiceman) hinted that he was an attorney, and maybe Michelin picked up on that. Plus, we don't know what tires came off the trailer, but we do know they were bouncing and that there was permission to use P metric tires on the trailer. This would have been a very precarious position for Michelin to be in - and the quick and dirty solution would be to get ST tires back on there to avoid any entanglements. Once done, Michelin would be completely off the hook.

Second, it isn't a clear diving line between tires such that certain kinds of tires aren't suitable for trailer use and others are. For example, just because a tire has the letter "P" in front of the tire size, doesn't mean it is not suitable for use on a trailer (or a Light Truck). The "P" has to do with a sizing convention and appropriate changes in load carrying capacity (beyond what is printed on the tire) would need to take place. Same with LT tires.

Also, when someone says: "Put LT tires on" when we are discussing 15" ST tires, that person doesn't understand that there are few LT tires in 15" - and there isn't a simple exchange that can take place. This has to be carefully looked at to get it right - AND there are situations where you can't do it!!

And relative to XL being better built than an ST: Sorry, but that isn't quite so. In fact, XL's are generally built weaker than most ST's. Where the real differences are is in the design - that is the placement of the materials, not the strength of them.

And lastly, those load/inflation tables: If you look very carefully, you will find those are MINIMUMS, not recommendations. So if the charts says the minimum inflation pressure would be 50 psi, then using 65 psi is OK - and maybe even advisable. Personally I think the inflation pressure should be such that the rated load is 115% of the worst case load.
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Old 05-25-2014, 10:32 AM   #34
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Originally Posted by aswbe View Post
Last June I swapped out my Goodyears at the factory for 16" Michelin's. They pulled them off a pallet mounted and ready to go. When I inquired about what tire pressure to use it stumped them. They are shipped to them at 72 psi and beyond that it up to you to figure out what is right for your trailer.

I related that story to the AS customer service person at the region 8 rally and he was not a happy camper. He directed me to the Michelin "RV" pressure chart and there I found my tire and at Max trailer weight and it should be 50-55 lbs. On other threads on this topic people from last fall time frame claim the factory was telling them 80 psi (tire wall max) and on this thread I have seen 75psi being used.

Two things learned: Michelin lists this tire on tire pressure chart on their web site titled "Inflation Charts for RV usage Only" (in my mind an implicit OK to use on a trailer). Second: Recommended pressure is way under what every one seems to be running at as related by many in this forum.

I am leaving on a 4000 mile trip and will be dropping psi from 72 to 64.
A savvy tire installer would have set your new tire pressures at a psi value that would equal or exceed the load capacity of the OE tires. That would have covered his six and placed any other decisions about it squarely on the shoulders of the trailer owner.

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Old 05-25-2014, 01:01 PM   #35
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Also, when someone says: "Put LT tires on" when we are discussing 15" ST tires, that person doesn't understand that there are few LT tires in 15" - and there isn't a simple exchange that can take place. This has to be carefully looked at to get it right - AND there are situations where you can't do it!!

And relative to XL being better built than an ST: Sorry, but that isn't quite so. In fact, XL's are generally built weaker than most ST's. Where the real differences are is in the design - that is the placement of the materials, not the strength of them.
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Sorry but field data doesn't support your classroom data.
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Old 05-25-2014, 01:46 PM   #36
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The Discount Tire website states that trailer tire should always be run at the maximum pressure as recorded on the sidewall. I tend to agree with this position. I always ran truck tires at the max of 100 lbs , even on steer axles where it was common to run tires as 90 psi.
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Old 05-25-2014, 02:42 PM   #37
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There is some other reason for your trailer bounce and you are not going to solve that problem by changing tires. The ride on my rig improved radically with Michelins. I was using E rated ST tires because they were a little better at not self destructing than D's but the ride was like an oxcart and hobby horsing was much worse than with Michelins.
I switched to Michelins 4 years ago after serial blowouts with ST tires and have no plans to ever switch back regardless of Michelin's position.
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Old 05-25-2014, 06:59 PM   #38
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I tow my QuikSilver 16-footer behind a '55 restored Ford Sedan Delivery. The first time I used the '55, the Airstream bounced like a basketball. A Forum member suggested I take all of the air out of my air shocks, which I did. Re-hitched, leveled and the bounce was gone.
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Old 05-26-2014, 05:24 AM   #39
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I did not intend for anyone to believe I was an attorney, I was and am not. I had attorneys work for me as CEO of several companies in my prior (work) life. I now believe, after much back and forth that the issue is not Michelin tires on an Airstream, but Michelin 15" tires on an Airstream. I have contacted Michelin Customer Care again as well as one of their attorneys along with Airstream and will advise what and if I hear back. I am going to get to the truth on this matter and an now thinking in terms of Sendel T03-66655T) and Michelin LT 235/75-16 tires as recommended by a number of forum participants. I like all do not want a belt separation and blow out.

My Best

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Old 05-26-2014, 05:52 AM   #40
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I now believe, after much back and forth that the issue is not Michelin tires on an Airstream, but Michelin 15" tires on an Airstream.
I recently asked Michelin, via email, about using LTs on my trailer. My issue was that I had three 225/75 16 MS2 and one MS (not involved in the recall) and I wanted to know if I could mix them. I specifically stated they were on my trailer to make sure they weren't considering I was using them on drive and steering wheels.

Their answer was that they don't recommend mixing them due to different tread patterns- and said nothing about their use on a trailer.
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Old 05-26-2014, 06:54 AM   #41
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Sorry but field data doesn't support your classroom data.

Could you be a little more specific? I spent over 10 years designing tires, so I think I know a bit about about the strength in tires.
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Old 05-26-2014, 07:09 AM   #42
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I had or still have not taken off yet - LTX 235x75x15 Michelins on our AS. These are the tires Michelin got excited over when I reported the bouncing of our trailer on a "test" run. Same road on the way too the tire dealer with Goodyear Marathons - no bounce. I too had an approval from Michelin to put their tires on our 30', 8,800# GVW trailer, but mine was not verbal it was via email. And the blow up occurred on their end when I sent them copies of the whole email string. They have yet to "apologize", or admit their mistake, but they have as noted in previous posts made monetary admission to fault.
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