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Old 08-02-2010, 10:50 PM   #1
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Michelin LTX LT 235/75-15

Anyone running the Michelin LTX LT 235/75-15 Load Range C tires with good results?
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Old 08-03-2010, 09:02 AM   #2
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This is for a 2000 30ft Excella.

Load range C tires max out at 50psi - load range D tires at 65psi, and for any kind of proper handling on that Airstream, you'd want load range D.

imvvho.
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Old 08-03-2010, 10:18 AM   #3
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I checked with Discount Tire and they told me that load range C was not heavy enough for my Classic. Since I have just had a blowout on a Marathon that has about 6000 miles on it I was hoping to be able to put the Michelin LTX tires on but for 15" wheels they are only load range C. The manager said the problem with all ST tires is that they do not dissipate heat very well and none of the ST tires do well in temperatures around 100 degrees when the trailer is pulled for long periods of time. The only option is to change out the wheels, which are quite pricey, or go with Maxxis load range E tires that are supposed to provide more safety for the load and in the heat. I have read that others have used these tires and they seem to work well. They are stiffer and it may not be best to inflate them to the maximum like the Marathons. There have been some reports of rivets popping if the max pressure is used. I am still trying to figure it out myself.

That is my 2 cents worth.

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Old 08-03-2010, 01:54 PM   #4
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Also, load range C tires are being used far outside their safety envelope of you put anything in your AS to get it near that 8300 lbs GVRW - 2075 lbs/tire...
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Old 08-03-2010, 03:31 PM   #5
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FYI, I have been running Maxxis, 225/75x15, Load Range E tires at 80 psi, on our 19-foot Bambi, for the past year and a half (approximately 10,000 miles), with absolutely no problems.
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Old 08-03-2010, 04:10 PM   #6
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Maxxis keeps coming up and keeps getting excellent recommendations. I think I will put a set on my lifetime trailer, when I find her!
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Old 08-03-2010, 04:21 PM   #7
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My 2 cents

As you can see, my 2010 FC30' has Michelin LTX M/S 235/75-15's (load C).
I think they're great for this basic reason; the higher load ratings run at higher PSI's; 60 and above. Mine run at 50 PSI. This gives my TT a softer ride which IMHO is very important to me.......

Here's the TireRack link: Michelin LTX M/S

So far, I've put about 10k miles on them with excellent wear.

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Old 08-03-2010, 05:02 PM   #8
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sorry ron,

but that's an OVERLY clever (not smart) tire choice...

especially for modern 30 footer with 4 batteries and an assortment of modern addONz.

mehbe the ratings are different when converted to metric...

you've got a NEW trailer.

the axles determine ride quality not the tires.

if u don't buy that notion,

fire off a note to the PREZ of a/s and ask.

the reference is a direct quote from the boss man.

not only will they HEAT UP and suck down fuel economy...

but the softness makes 4 totally vague control and stability.

especially in a 75 series tire that's TALL baby, tall.

u might NOT notice the POOR stream wobblin,

because of the hitch selection,

but behind that hitch yer trailer be squirrelly...
________

to the op...

there is simply NO GOOD REASON to put c rated (or the equivalent) tires on a MODERN 28/30/31 footer.

one MIGHT make a case (lame as it is...) 4 C rated tires on a 34,

but have a flat and forget that trick too.

a/s specs D rated or higher on these trailers for a reason.


cheers
2air'
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Old 08-03-2010, 05:07 PM   #9
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Ron, I would point out that you're in Quebec, and JakeSpoon is in Texas, there summer temps are easily 105F in the shade, and were road temperatures can easily reach 170F. This means tires on Texas trailers face a different set of harsh conditions to those in your part of the country.

Higher PSIs equal stiffer sidewalls which generate less heat.
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Old 08-03-2010, 07:29 PM   #10
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4 LTX M/S 235/75-15's (load C) = 7,940 lbs. max. load. I would of thought the 2010 FC30' trailer weighed more, loaded up for camping.

If you want to keep the stock wheels, and want something else besides the ST trailer tire, you can go to a 225/70/r15 size. I believe TireRack shows 2 tires in that size that are D rated. You will lose 1/2" in height using that size.
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Old 08-03-2010, 07:34 PM   #11
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I'm not advocating for any particular tire, but to answer the original poster's question: like Ron, I am running a 30 footer (Safari), weighing about 7,500 loaded, with Hensley and the Michelin LTX 235-75/R15 Load Range C.

6,000 miles so far and no problems. Wear is negligible. If I'd been running the ST tires I used to use, I would have had at least one tread separation by now. I plan to report further at 10k and 20k miles.

2air: Your theoretical objections are not borne out by my empirical evidence so far. My trailer is not squirrely. The tires are not running hotter than the ST's they replaced (measured with infrared). Fuel economy is not less.

What I have noticed is that I'm not spending time at the side of the road replacing tires any more. I'm hopeful that things continue along the same way.
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Old 08-03-2010, 08:09 PM   #12
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HI RICH!

the mich' is a fine tire and IF it were properly rated for this application...

the 16 inch version is available with MUCH MORE capacity and higher pressure ratings...

and as u know using the 15 is a compromise to keep down the expense of new 16 inch wheels.

_________

but how can u compare mpg, the tv is NEW/different.

and infrared SURFACE temps aren't tire temps, not really....

what is a GOOD tire TEMP anyway? or how high is TOO HIGH, can u tell us?

the hensley means most/any trailer instability is NOT obvious to the driver.
_________

basically ONE RV SHOP is advocating this tire alternative...

the same shop that TOTALLY IGNORES vehicle ratings.

and sends folks out on UNDER RATED grossly INadequate rigs as a matter of routine.
_________

and as suggested it's "too clever" but not necessarily a wise choice in tires.

take ONE SIMPLE CONCEPT like the LOAD numbers ...

these tires have a 'load index' which is not the same as the load rating/capacity for st tires...

in fact the 2 things and LOADing types/values are very different.

but that basic stuff gets TOSSED OUT, just like tv ratings, axle ratings and so on...

it's comical logic and the approach is FULL of false assumptions.

support that is basically "i tried it and everything is OK" only adds to the false security and ILLogical path.
__________

sorta like INCREASING axle rating but going DOWN in tire carry capacity?

the extra axle rating is USELESS when limited by tires and it's the tires that can fail in use.

IF i were to draw/make assumptions based on the horrible tire misadventures u have experienced...

the conclusion would be a FULLY LOADED 30 bunkhouse that gets USED much...

needs MORE than a D rated st tire...

and that's why E rated st tires exist.
__________

additionally 6,ooo miles towing and an N of 1 is meaningless.

tire companies have 100s of thousands of miles of data SPECIFIC to a given model ...

____________

lets make this REAL SIMPLE...

contact a MICHELIN tire engineer or company rep and describe the intended application AND loads ...

then see if THEY give approval for this underrated tire for use on these trailers...

i know, i know... ONE SHOP is smarter than the folks who make the tires AND the trailers...
___________

i've spent ZERO TIME on roadways dealing with properly rated ST tires in ANY failure mode over 5 years...

and with mileage equal to MOST heavy users.

again its JUST an N of 1 but equally as valid for empirical use...right?

cheers
2air'
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Old 08-03-2010, 08:23 PM   #13
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I'm really tempted to replace the wheels with 16", so I can run 225/75-16 Load Range E Michelin LTX's. I want Michelins, damn it!

Having spent many years working for a major tire company, I'm not convinced Maxxis tires are the answer. Maxxis is a relatively small manufacturer compared to Goodyear or any of the other majors. And, while I agree Marathons are terrible tires, I'm not ready to anoint Maxxis due to the relatively small sample size.

Should the 225/75-16, at 29.4" tall, work on the 30' Airstream?
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Old 08-03-2010, 08:33 PM   #14
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jake...

YES the 16s fit, there are several LONG threads here on this,

including photos and install pics.

((some older trailers need TINY modifications at the wheel well molding lips...it's a minor thing))

and clearance ABOVE and between the tires goes down some, again considered a minor issue.

crawfordgene, artstream, fr8shaker and some other texas folks have gone to 16s without FIT problems...

and i fully agree that the maxxis data is skimpy on this, especially with so FEW of them in use ...

and while the trailer IS currently rollin' on the max' E tires, i've yet to hit the 10 or 20k milage meter for reporting.

but since the gyms have been GREAT on my unit and performed exactly as expected...

it's not clear 2me how the Mz will be better...

cheers
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Old 08-03-2010, 09:06 PM   #15
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Our experience with the 16" Michelins has been fine so far—more than 13,000 miles. They are wearing at a rate that indicates a life of at least 55,000 miles. They do not lose air like Marathons did. While I had the Marathons, I had the valve stems changed from rubber to metal and they still lost air, so it's not all that likely it was the valve stems, though it's possible.

Fit works for some, perhaps not for all. It seems some Bambi's would be a problem and some long trailers also, so measuring carefully is important. Check Michelin's website for the exact outer diameter of their tires. This is not something you want to get wrong. Some people have trimmed the wheel cutout at the bottom and bent the shiny trim back a little—there are photos of that on a thread somewhere and you may find it if you look hard enough. 2air calls them molding lips. It did not look all that hard to do.

This is an expensive change. You will also have to get a 16" wheel for a spare. Getting an expensive matching wheel instead of a steel one means you can rotate the spare and not waste that tire. This, it seems to me, gets 20% more miles from the tires.

The 16" wheel and tire means the spare tire carrier has to have some parts bent outward for the tire to fit. It can be done, but i prefer to carry the tire in the bed of my pickup.

Since your trailer will be 1/2" higher, you may have to re-adjust your hitch.

There are long threads on the differences between LT and ST tires. It is good to consult them. The main difference as I understood it is the ST has stronger sidewalls, but everything else about the LT's seems superior to me. Stronger sidewalls matter most, I think, when backing at an extreme angle, something to be avoided if possible anyway.

C Load Range? Seems pretty unlikely to me, but it's best to check manufacturers' load ratings. If you use a C rated tire and it blows because of more weight than it is rated to carry, any warranty would be void.

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Old 08-03-2010, 09:18 PM   #16
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I don't know much about trailer tires and such but I have PowerKing Towmax tires on my little 22' Liner and I've not had any problems with them. I upgraded to a 15" wheel and using ST 205/75R15's. This is a load range C but my trailer is light to say the lease. I noticed PowerKing does make a 235/75R15 in a load range D and E. It's called the Equalizer Sport AP tire. I found the site tires-easy.com helpful in tire research. They have many brands and a great knowledge data base section to reference. My biggest issue is trying to find steel wheels that fit a 1950 Airstream Liner. It's a 15" x 6" wheel with a 5 lug 5 1/2" bolt pattern. So far I've found this wheel to fit a 1953-56 Ford F-100 pickup.
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Old 08-04-2010, 10:13 AM   #17
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My C's

2Air,
There is probably no one I respect more in the forum than yourself.
I find your knowledge to be second to none.

Ok, here goes...

That being said; I don't believe you can "always" rely on just the numbers to make a choice. There are a multitude of reasons why various manufacturers will apply ratings, recommendations & limits to their products.

i.e. Years ago when Chrysler came out with their first minivan, it's engine produced something like 130hp and similar torque. That pile of cr%p was rated to tow 3500lbs. A 2010 Dodge Caravan with a 4.0 V6 with 250hp, better suspension, more rigid body structure has the same 3500lb tow ratings. Why? Maybe to protect the RAM's sales, the RAM's profits.

The Chrysler 300 in the USA is rated to tow 1000lbs; but the same vehicle sold in Europe is rated to tow 3500lb. Why? It's the same car; just a different market.

Everyone knows by the shear volume of posts here in this forum about trailer tire problems. I don't have to go in detail about them; if you're reading this post, you know them all.

My buddy had 2 of his Marathons blow on him during his first season! When's the last time you've heard a 'C' Michelin coming undone after only a couple of K miles; or after 50K miles? Many people are using them with excellent results regardless of their ratings. What comfort do you have with the Airstream running on a properly "rated" tire that explodes? I'll take the 'unrated' tire that stays round.

To me the proof or myth is in the experiences of all us "ONE SHOP" followers; who RV happily & safely I should say with our unrated equipment. I read lots of posts from people unhappy with their dealers or service shops. Can you find me one post from a client from that "ONE SHOP" guy up here that's unhappy with their dealings or experiences?

Nuff said,
Ron
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Old 08-04-2010, 01:06 PM   #18
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as far as the tow ratings go, there are at least two points to be considered.

http://www.airforums.com/forums/f463...ies-31559.html

the other is that towing a trailer in europe is a whole different story. they are set up for very low tongue weight, among other things.
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Old 08-04-2010, 01:08 PM   #19
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Quote:
Originally Posted by richinny View Post

the other is that towing a trailer in europe is a whole different story. they are set up for very low tongue weight, among other things.
You've got to be kidding me!
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Old 08-04-2010, 01:33 PM   #20
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Quote:
Originally Posted by Rawn77 View Post
You've got to be kidding me!
no joke, read this and tell me what you think.
Product Family | Airstream Europe : Airstream, overview of the most recognizable caravan in the world

many of the folks that import built4us models also tow with built4us tow vehicles.
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