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Old 08-20-2012, 03:11 PM   #85
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I'm no tire guy, and I'm not an airstream repair guru.... But the little bit that I've seen and experienced with my airstream. The trailer really behaves more like a sedan, and not a camper trailer at all. Lane changes, switchback roads, severe side winds, emergency stops (damn bison on the road), emergency lane changes, passing semi trucks; my AS just tucks down and chases my suburban through it all, like a 31 foot Honda civic.

That being said I guess a tire that is more likely to do all those things to would be a good idea, and not a supper stiff, and fragile "trailer" tire. The wife said to me on the way back from Montana last week, "do those big trucks (tractor trailer rigs) use special trailer tires?". I honestly don't know, I don't drive truck, but it doesn't look like they do, was all I could answer.
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Old 08-21-2012, 10:44 AM   #86
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We just got back from a 1300 mile round trip with the new tires. They ran cooler than my old E rated ST tires. No handling issues that I noticed. Watching the tires during pivots when backing in showed no unusual deflection of the sidewalls.

I have no misgivings regarding moving away from ST tires and going with 16 inch wheels. The fact that I am using the exact tires and wheels that are on the Eddie Bauer model Airstream gives me a better level of confidence that what I've done has a certain level of factory support, although I realize that Airstream carries no liability regarding my using the new wheels and tires.

While the rib model tires might be superior to the LTX style, if I stick to a five year life cycle and based on my travel, I think the LTX tires will provide a better value.

Will a Michelan ST tire (assuming they build one) be a superior tire than other ST tires? I'm not so certain. Since we've seen multiple brands of ST tires fail, could the issue be the tire specs related to the ST standard. Is it the fact that some tire dealers tell you that the weight rating of the tires will go down as the tire ages. Combine that with the fact that many of us are not towing light weight trailer. Put the two factors together and you have the classic ingredients for tread/belt separation.

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Old 08-21-2012, 11:18 AM   #87
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As to "stiff sidewalls": Yes, they are wanted on a TT. Keep any tire chosen at sidewall maximum stated pressure [cold reading]. The info on Barry's Tire Tech in re cross-referencing ST and LT tires to obtain the closest size/rating match will help in load index questions (no need for 80-psi tires on quite a few A/S trailers).

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Old 08-21-2012, 11:42 AM   #88
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Why do trailers need stiff sidewalls? It is because of the high center of gravity? Is it to justify the existence of trailer tires? No one has answered this question. Any tire will get stiff at 80psi.

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Old 08-21-2012, 11:59 AM   #89
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Why do trailers need stiff sidewalls? It is because of the high center of gravity? Is it to justify the existence of trailer tires? No one has answered this question. Any tire will get stiff at 80psi.

Perry
Hi, I believe, but could be wrong since I'm not a tire expert, that stiffer sidewalls could help prevent trailer sway. Once a trailer starts to sway a soft sidewall could make it worse to get under control. All I know for sure is that in the eight years that I have owned my trailer, it has only swayed violently out of control once. And that was with it sitting in my driveway during a 5.0 Earth Quake.
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Old 08-21-2012, 02:38 PM   #90
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Hi, I believe, but could be wrong since I'm not a tire expert, that stiffer sidewalls could help prevent trailer sway. Once a trailer starts to sway a soft sidewall could make it worse to get under control. All I know for sure is that in the eight years that I have owned my trailer, it has only swayed violently out of control once. And that was with it sitting in my driveway during a 5.0 Earth Quake.
You are correct. With a stiffer sidewall the ride of the tire is more firm. This prevents the bouncing action.

Also an added benefit of a stiffer sidewall is they do have less rolling resistance and you will get a little bit better fuel mileage that you may or may not notice.
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Old 08-22-2012, 01:09 PM   #91
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Just ordered my tires from my small town tire shop. I went with the Michelin LTX M/S 225 75 R16. When All was said and done it cost me $1.16 more overall over Discount tire. Plus I would have to drive 50 miles to Discount tire and back, so it would cost more in the end..

And I like to support my local businesses. I can get any rebalancing done local..
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Old 08-23-2012, 12:43 PM   #92
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After doing more research it seems that the ST tires have stiffer walls to help reduce sway. However, If you have a properly hitched and sway control hitch and a low center gravity trailer these sway issues don't apply.

I think radials are going to give the trailer a smoother ride and should have less rolling resistance than bias ply tires. Radials have a larger contact patch with the road and much better traction than bias ply tires. Now would a ST radial have less resistance than a car radial, I don't know?

I think ST tires are designed to carry high loads with high centers of gravity for short distances at low speeds. Airstreams are moderate loads with low centers of gravity that are usually towed at high speeds for long distances much like a car. Airstream owner tend to put more miles on a trailer than your average once or twice a year camper/boater who only goes a few miles from home.

Perry
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Old 08-23-2012, 01:48 PM   #93
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Wonder how they make the side wall stiffer. Wonder if a d or c rated st tire is the same as an LT e rated tire?

All I Know is; there aren't a bunch of threads about LT tires blowing out, and there are plenty of people using them. If I get a blow out I will start the thread.!
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Old 08-24-2012, 07:49 AM   #94
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The stiff sidewall question has been gone over. The "Revised" thread links to the discussion on RV.net will take one there (for a start).

The reason for stiff sidewall isn't simply trailer transient steering response, but that a trailer is levered into position, and not just while backing, though that is the hardest tire duty. Practically, any time a trailer is turned past a certain point the trailer pivots and this stress tends to want to tear the tire off of the rim. This is why one runs the TT tires at full pressure regardless of load. And, partly why one wishes to have the tire Load Index factor come closest to actual operating conditions (LR-E may seem great, but LR-D may be the best match for the TT).

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Old 08-28-2012, 01:47 PM   #95
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New rims came yesterday. At the tire shop, New Michelins come in tomorrow... just ready for the trip.
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Old 08-28-2012, 05:00 PM   #96
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I have a 62 22' Safari that I would like to put Michlin tires on but the two dealers nearby say they don't have anything that will fit. I currently have 7.00 - 15
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Old 08-28-2012, 06:11 PM   #97
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These are going to look so good. Anyone interested in the origin rims ?
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Old 08-28-2012, 06:16 PM   #98
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New rims came yesterday. At the tire shop, New Michelins come in tomorrow... just ready for the trip.
Jason, are the wheels from Airstream factory that come on the EB model? or did you find other rims?
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