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Old 06-08-2016, 10:00 PM   #21
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Here is the regulation:

49 CFR 571.110
Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity information for motor vehicles with a GVWR of 4,536 kilograms (10,000 pounds) or less.

S4.2.2.1

Except as provided in S4.2.2.2, the sum of the maximum load ratings of the tires fitted to an axle shall not be less than the GAWR of the axle system as specified on the vehicle's certification label required by 49 CFR part 567. If the certification label shows more than one GAWR for the axle system, the sum shall be not less than the GAWR corresponding to the size designation of the tires fitted to the axle.

S4.2.2.2

When passenger car tires are installed on an MPV, truck, bus, or trailer, each tire's load rating is reduced by dividing it by 1.10 before determining, under S4.2.2.1, the sum of the maximum load ratings of the tires fitted to an axle.

S4.2.2.3

(a) For vehicles, except trailers with no designated seating positions, equipped with passenger car tires, the vehicle normal load on the tire shall be no greater than 94 percent of the derated load rating at the vehicle manufacturer's recommended cold inflation pressure for that tire.

(b) For vehicles, except trailers with no designated seating positions, equipped with LT tires, the vehicle normal load on the tire shall be no greater than 94 percent of the load rating at the vehicle manufacturer's recommended cold inflation pressure for that tire.
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Old 06-08-2016, 10:40 PM   #22
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I just bit the bullet and installed Sendel 16" rims, Centramatics, TST TPMS, and Michelin 225/75R 16 E XPS Ribs on our '15 27FB Classic. I did two short runs up the Delta (20 mile and 100 mile) to "set" the new wheels and replacement McGard lugs at 110 ft/lbs, and test the TPMS - so far, so good. I honestly cannot say that I felt any difference between the new set of rims/tires and the old 15" stock rims and GYM tires, but I chalk that up to the fact that the Ram 3500 doesn't seem to notice that it has a trailer in tow in either configuration. I went the extra expense for the steel-walled XPS Ribs because of the expected stress on the sidewalls. I'm going to try running them @ 75 lbs each, which would give them plenty of margin on our load (hard to get a 70 degree pressure reading in Mississippi this time of year - it's already 80 degrees by 6am!).

The real proof of the pudding comes next week as we drive the 1500 miles to the Adirondacks of New York State. I'll report back on my experiences after the 3000+ mile round trip...
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Old 06-08-2016, 11:11 PM   #23
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Sounds good, best wishes for a great trip on your new 16" Ribs!

Meanwhile, here's a link to the document that Switz and SteveSueMac cited above, for those of you who like to read that stuff. Just do a search of that document for "S4.2.2.2"

https://www.gpo.gov/fdsys/pkg/CFR-20...sec571-110.pdf

OR

https://www.gpo.gov/fdsys/granule/CF...ol6-sec571-110 (from here you can choose to download the PDF or the XML (text) version)
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Old 06-09-2016, 10:47 AM   #24
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Quote:
Originally Posted by AtomicNo13 View Post
Yes but as Michelin will tell you...
Mounting an LT tire on a travel trailer is a misapplication and voids the warranty of the tire.
michelin sent me a letter stating their official policy and position. Many say something to the effect that Airstream offers these as standard... its Airstream's decision not the component manufacturers......
I'm not trying to start a war, just sharing factual information right from the source. This smart person tried them.and literally ripped the sidewall at the bead while backing his tripleaxle on 2 different sets. Ive had failures of the sidewall as well. This cost me.tens of thousands of dollars on repairs... a well maintained st tire has cost me zero on failure repair. I.fulltime and cover 20-50 thousand miles a year.

With all due respect friend I refuse to believe that you ripped the sidewalls apart on a Michelin tire. You would have to nail the tires to the ground for that to happen. I couldn't do that running it flat for 5 miles. I never a had a Michelin tread separation or any kind of major tire failure. I sure had it with a GYM ST tire with 2 other tires ready to do the same.
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Old 06-09-2016, 11:15 AM   #25
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Ive had more failures with Michelin than any other brand. do you have experience with a triaxle Airstream?
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Old 06-09-2016, 11:20 AM   #26
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I feel like grabbing some popcorn - don't know why... 😀
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Old 06-09-2016, 05:06 PM   #27
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Old 06-10-2016, 06:19 AM   #28
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Old 06-10-2016, 06:28 AM   #29
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Quote:
Originally Posted by AtomicNo13 View Post
Yes but as Michelin will tell you...
Mounting an LT tire on a travel trailer is a misapplication and voids the warranty of the tire.
michelin sent me a letter stating their official policy and position. Many say something to the effect that Airstream offers these as standard... its Airstream's decision not the component manufacturers......
I'm not trying to start a war, just sharing factual information right from the source. This smart person tried them.and literally ripped the sidewall at the bead while backing his tripleaxle on 2 different sets. Ive had failures of the sidewall as well. This cost me.tens of thousands of dollars on repairs... a well maintained st tire has cost me zero on failure repair. I.fulltime and cover 20-50 thousand miles a year.
Incomplete facts. What size and type of tire are you referring to? What was the inflation pressure, how old were the tires, was this just one situation or can you document others, repeating from other forums only perpetuates partial correct info.
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Old 06-10-2016, 06:51 AM   #30
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First set of six on my PanAmerica ms2 225 7516" E in 2010 were 10 months old. This Airstream sees very rare service and.lives in.climate.control. Maintained at 72 psi. Sidewall ripped not unseated while backing into my storage building. Michelin refused any warranty. Claimed misapllication.
Second set on my Classic 34 in 2011. Same size
Tires were 7 months old. Maintained at 72 psi.
sidewall blew. Discount tire replaced all 7. Insurance payout of $50xxx to replace sidesheet.
As we speak on my Excursion I have a 265 75 16" E properly maintained coming apart. These tires were new in December. 10000 miles, never abused!
Im never buying anything but the Michelin rib or the xzl.
Im going back to the Firestone on my to vehicles and Carlisle on the trailers.
I am a Michelin fan but just not this tire. I have learned my lesson with too many failures.
I do miss the old ms series xms244!
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Old 06-10-2016, 07:30 AM   #31
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Those were P rated tires?
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Old 06-10-2016, 07:33 AM   #32
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Tires deteriorate when not being exercised regardless of storage. Sorry you had such bad luck but I think your situation is unique.
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Old 06-10-2016, 07:50 AM   #33
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The tri-axle puts a lot of stress on that center axle tire. Maybe in that application that center tire may need addition tire pressure. While I would think from a true load capacity situation, 72 psi would be perfectly acceptable, there are a lot of lateral forces on that center axle as you turn.

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Old 06-10-2016, 08:59 AM   #34
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Quote:
Originally Posted by AtomicNo13 View Post
Ive had more failures with Michelin than any other brand. do you have experience with a triaxle Airstream?

Actually I had lots of experience with tri and quad axle trailers. Low Boys, hauling 120,000# Dozers and Backhoes. Never used anything but Michelins. Talk about torquing all 3 axels backing one of these into a narrow Chicago Ally.
Never had a tire failure like the once you described on any of the Michelins.

The strange tales I read on these here Airstream forums makes me anxious to open my browser every morning with great anticipation.
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Old 06-10-2016, 10:53 AM   #35
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Frankly..... Frank, your trailers tires vs Airstream tires is like comparing apples to oranges. Completely different construction!

Ive had 2 failures with Michelin tires, your point is? Are yu ssying its impossible for a michelin tire to fail?
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Old 06-10-2016, 03:44 PM   #36
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I went to a local tire dealer and told the guy in charge (who has been in charge there for 30+ years) that I wanted the Michelins that I saw being touted on this forum. He just looked me in the eye and asked, "Why do you want to put those on your Airstream?" I replied, "Well, that's what a lot of folks on the Airstream forum are touting and, being a man of no particular moral fiber, I stand before you saying, 'me too'." Lucky for me, he sold me what I needed, not what I wanted, even though he would have made more money the other way around. At least in the short run.

I had an eerily similar axle experience, recounted elsewhere.

As it turns out there are plenty of people around K.C. who have a wealth of knowledge about axles, tires, metal fabrication and other stuff one needs advice about in the course of undertaking the folly of rehabbing an old Airstream. I'll keep reading stuff here, but plan to seek the true aluminum gospel from local preachers.
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Old 06-10-2016, 03:45 PM   #37
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Franklyfrank,

Were you using actual Michelin trailer tires on your commercial trailers? If so, I am not surprised by their great performance. Michelin is probably the best tire out there, but as they say, you have to use each of their tire models for their intended design purpose.
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Old 06-10-2016, 03:48 PM   #38
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I went and had what I believe to be the best tires in its class installed today. Four new Michelin Defenders, but on my truck!
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Old 06-10-2016, 04:39 PM   #39
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Quote:
Originally Posted by Rocinante View Post
Per the Michelin website, the rating for each of the Michelin Defender LTX M/S 235/75R15 235/75R15/XL 109T tire is 2,271 pounds @50psi.

De-rated by 10% for trailer use (there are dissertations about this all across the Forum), the rating would be 2,064. Multiply that by 4 to get 8,256 total capacity.

Here's the link that provided the weight capacity info: http://www.michelinman.com/US/en/tir...tail-sku-table
This Web site does NOT give any information on wt. Ratings, or any other useful information
All they ask is for the type of auto, And where you live for a closer dealer.
AND absolutely nothing for use in trailers.

Michelin has a good tire, but their web-site is a waste!
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Old 06-10-2016, 04:45 PM   #40
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Installed five new Michelin Defender series LT265/70R17E tires today on my 2012 Ram 2500HD Cummins as they had aged out. Only 50,000 mile warranty instead of the 70,000 mile warranty on the prior generation.

Discount Tire in Mesa out the door price was around $1,067 complete.
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