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Old 07-09-2012, 06:37 PM   #113
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I am going to have my LTXs mounted by Thursday. I am planning on keeping a specific tire log for the life of these tires. I will keep track of miles, conditions, pressures and of course any failures that might occur. I would like to encourage others to keep similar tire logs on AS trailers in order to build a database that can be used by others when evaluating trailer tires. The more data that is collected, the more difficult it will become to argue against reason with hope and faith and wishes. Good solid data should put this issue to rest.
I understand. The absence of real data has made analysis on this topic challenging. I see some respondents mention that they tow in excess of 70mph, a speed I wouldn't even consider approaching while towing, regardless of the tires. Don't forget to track speed and weight.

While the intention is laudable. it's difficult to perform large-scale statistical analysis on a single user, or even small, uncontrolled group. I've seen many posts of users having traveled a few hundred, or even few thousand miles on their new xyz tires without incident. It's interesting, but irrelevant; it's kinda like the old joke where the man falls off the 40-story building, and after 39 floors, says, "so far, so good".

Nevertheless, gotta start somewhere. It would be nice if the NHTSA would track this data and publish their results. The biggest seller can reasonably be expected to have the greatest number of failures in nominal terms. Do they have they greatest failure rate, and what were the weights, speed, ambient temperature, inflation, etc. at the time of failure?
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Old 07-09-2012, 07:26 PM   #114
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Originally Posted by Kamiak View Post
While the intention is laudable. it's difficult to perform large-scale statistical analysis on a single user, or even small, uncontrolled group. I've seen many posts of users having traveled a few hundred, or even few thousand miles on their new xyz tires without incident. It's interesting, but irrelevant; it's kinda like the old joke where the man falls off the 40-story building, and after 39 floors, says, "so far, so good".
Some organization to the data will be beneficial, even it not perfect. The cost of perfect information here is orders of magnitude out of range of the subject matter. However, organized data is still valuable.

What I imagine for data collection is a chart with a row for each user. The columns will include trailer; tire ID; nominal pressure carried; auto or manual pressure gauge; date installed; miles; visual wear; failure incidents; comments. It is probably unrealistic to attempt to capture road conditions, temperature and all those environmental variables. If the above was captured for say three years, and had a few hundred users, I think some interesting stats would precipitate out.
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Old 07-09-2012, 07:40 PM   #115
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Yup. We have to "tease the data until it yields". I'm hoping for the best. Meanwhile, my next tire purchase is fairly imminent, not eminent, so I'll have to take my best guess.
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Old 07-09-2012, 08:53 PM   #116
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I think that the ride quality of radial tires is much better than bias ply tires which means less problems with loose rivets etc.

Perry
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Old 07-09-2012, 09:28 PM   #117
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Someone mentioned previously on this thread that there are less and less 15" options. In my current explorations, and I am looking at 16" wheels, there are not many options for 6" width wheels and tires (16x6), more options and availability with a 7" width (16x7). Has anyone else found this and has anyone gone with a 7" wheel?

On my trailer I have 1 1/2" clearance from the wheel well and the tire itself.
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Old 07-09-2012, 10:12 PM   #118
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Someone mentioned previously on this thread that there are less and less 15" options. In my current explorations, and I am looking at 16" wheels, there are not many options for 6" width wheels and tires (16x6), more options and availability with a 7" width (16x7). Has anyone else found this and has anyone gone with a 7" wheel?

On my trailer I have 1 1/2" clearance from the wheel well and the tire itself.
In my search of 15" alternatives, I've prepared a spreadsheet from Tire Rack data. In my spreadsheet, I included non-ST tires at either 235/75R15 or 225/70R15 with a load capacity equal to or greater than 2,183#, compared to my GYM 225/75R15's. There's 12 tires on this spreadsheet, excluding the comparison GYM. They range in load capacity from the 2183# on several tires to 2470 for the Continental and Goodyear 225/75R15 ribs. I've tried to upload the spreadsheet several times, without success. I get some sort of error code, but I don't recall the specifics. I'm guessing it's because I have a number of formulas and conditional formatting in the spreadsheet, essentially macros that the website blocks.

In any event, there are several 15" options out there, including tires made by Continental, Goodyear, Goodrich, Michelin, Bridgestone, Yokohama, Firestone, and Hancock. I'm most intrigued by the Goodyear and Continental ribs and their significant load capacity, load range D, 65# psi. They have the "summer" caveat against use in temperatures near freezing, as I'm told the material becomes harder at those temperatures, yielding lower traction. Traction would be relevant in stopping, but I don't typically Airstream at those temperatures, so I'm not persuaded it is relevant to me. Others with experience with these tires may be willing to share their experience. The other potentially relevant factor pertaining to these tires is their 225/70R15 size, almost 1/2" lower to the ground. That could matter exiting some driveways, but I have no idea how frequently that issue might arise. It might matter more to some coaches than others, i.e., particularly those with a longer overhang behind the rear tire. I'm careful with my 25-footer, so with my current 225/75R15's that's not an problem.
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Old 07-09-2012, 10:22 PM   #119
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Helpful, thanks Kamiak.
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Old 07-10-2012, 06:43 AM   #120
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I've tried to upload the spreadsheet several times, without success. I get some sort of error code, but I don't recall the specifics.
That would be great to see. Can you export as CSV maybe?

Do you have the Firestone Destination's on there? I use those now on my TV after having sidewall failures on Michelins on my previous 3/4 ton truck (yes, tires other than GYM fail too )
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Old 07-10-2012, 09:05 AM   #121
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That would be great to see. Can you export as CSV maybe?

Do you have the Firestone Destination's on there? I use those now on my TV after having sidewall failures on Michelins on my previous 3/4 ton truck (yes, tires other than GYM fail too )
I'll try again, but it will have to be later this evening.

Yes, two Firestone tires were on the list, viz Destination LE 2 (108T XL), and Destination A/T (108S XL). Both are 235/75R15. The initial, primary objective was tires that could carry the weight, and didnít get into the fine sort of analyzing tread patterns which might be too "aggressive".
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Old 07-11-2012, 07:35 AM   #122
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I re-copied my spreadsheet, and "pasted special" into a new spreadsheet with "values only", i.e., no formulas. The file is only 18kb. It didn't help with the upload. This is the error message that I get. Gremlins, I guess.


Your submission could not be processed because a security token was missing.

If this occurred unexpectedly, please
inform the administrator and describe the action you performed before you received this error.
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Old 07-13-2012, 06:27 PM   #123
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Michelin

I had my new Michelin LTX 15" tires installed today on my stock AS 15" wheels. I had the DILL TPMS system installed too. I am so happy to have these new tires in place of the GYMs. My GYMs with around 3,000 miles already had so many bizarre deformations of the sidewall, I could never trust them. Interestingly, all these new Michelins have uniform, smooth sidewalls, much like every tire I have ever owned in the past 45 years of driving.
I went for the LTX 235/75R15 with XL load range of 2183 pounds. This gives plenty of margin on my 25 Flying Cloud.
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Old 07-13-2012, 07:05 PM   #124
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Okay! I wasn't going to do this, but I can't resist! It looks like we're clones!

Other than the TPMS, I can just say "ditto" to all you said!

I also have a pic of just one of the old tires - severe wear on the outside edge - and found both axles have a slight bow in them, almost as if they had been used as jacking points in the past (and maybe are thus putting a "toe-in" on the tires? All were worn similarly). I think that's the next project!

But, I'm pretty pleased with the new look and ride.
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Old 07-13-2012, 07:19 PM   #125
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Okay! I wasn't going to do this, but I can't resist! It looks like we're clones!

Other than the TPMS, I can just say "ditto" to all you said!

I also have a pic of just one of the old tires - severe wear on the outside edge - and found both axles have a slight bow in them, almost as if they had been used as jacking points in the past (and maybe are thus putting a "toe-in" on the tires? All were worn similarly). I think that's the next project!

But, I'm pretty pleased with the new look and ride.
How old are those tires, how many miles, and how long have you been using them anywhere near to that condition?
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Old 07-14-2012, 01:38 PM   #126
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Hi Kamiak - all the answers you ask are unknown - except the last - "how long...."

I've had the AS now about three weeks. The PO said the tires were "about 6 or 7 years old..." and I knew their condition (while I could see outside wear, no sidewall cracks or indications of any other problems, etc.) when I made the purchase; but they were sound enough to take a 130 mile up-and-back shakedown to Glacier just before the 4th of July. We were satisfied with that exercise and found little not to like, including the ride and how it pulls with the hitch system I installed.

The tires are TOYO and while I could replace them with like kind, like others, I want to have confidence in the running gear when I'm driving down the road. BUT, the condition of the tires were an obvious priority, and that led me to this thread several weeks ago (and every other one about tires and wheels...) and all that led to the Michelin decision. There is a wealth of information, as you know, and I'm thankful for the collective wisdom of the forum. Thus, I thought the picture of the tire might be of help in the discussion as well as to get thoughts about what might be causing it -- thus, the observation about the axles. Something caused the tires to wear like that (toe-in) and I sure don't want to continue it with the new ones.
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