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Old 03-30-2015, 09:54 AM   #1
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Helping a stranger

I recently met an older gentleman with a triple axle 34. I let him know about a defect in the sidewall of one of his existing 15" tires. He is of course immediately interested in new tires, but not going 16, and not keeping with ST tires.
Has anyone used the Mich MS2 Tire on a tri axle? A quick read shows only a 1900 pound rating!
An equivalent e load range st tire carries nearly double the load. I have intentionally avoided the tire threads, now I need some advice!
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Old 03-30-2015, 10:03 AM   #2
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That horse should have been buried by now.
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Old 03-30-2015, 10:11 AM   #3
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Andy at CanAm typically installs the Michelin LTX (P) 235/75R15 XL tires with a derated for trailer use load capacity of 1,985 pounds per tire. That means six of these will support 11,910 pounds.

The last year the wide body 34' Classics were officially made (2011) they had a GVW of 11,500 pounds with a factory tongue weight (which is a notoriously low number) of 710 pounds. The literature empty weight was around 8,126 pounds.

Unless one loads the trailer up with old engine blocks, it would hard to imagine more than 2,000 pounds of "stuff" inside. Thus the axle supporting load would increase from (8,126 - 710) to 7,416 pounds to perhaps 9,400 pounds. That load is within reason for the six 15" Michelins.

The older narrow body units were lighter and had a lower GVW.
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Old 03-30-2015, 11:43 AM   #4
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Was faced with a similar problem for my 1993 34 footer and after much research purchased 6 Maxxis ST225/75R15 D from Simple Tire on line. Had them shipped directly to my installer where they arrived in two days. At my request, Simple Tire made sure that all six tires were less than one year old and all the same production date. That was last year and the tires performed flawlessly. Am very pleased with the Maxxis tires and with Simple Tire.
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Old 03-30-2015, 12:09 PM   #5
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I went through this same dilema for my triple-axel Avion-34V. After much research, I settled on the Commodore ST-225/R15 - Load Range E tires from Big-O Tires.

I'm a big fan of Michelins. I run them on all three of my other vehicles and could not be more pleased. But on my trailer, I like to have lots of weight carrying headroom. These tires carry more weight and are rated for a higher temperature than the Michelins.

I have Tire Minders on all my TV and trailer tires so I can monitor pressure and temperature on all 10 tires in real time. The Commodores never get warmer than the TV tires and do not suffer from any excessive pressure fluctuations. I run them at 65psi and never more than 65mph.

After 2 years and 12,000 miles, I could not be more pleased.
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Old 03-30-2015, 12:46 PM   #6
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Thanks for your replies, I think I will suggest the Michelins but also mention the Big O route as well!
Why is this such a miserable task for us?
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Old 03-30-2015, 03:56 PM   #7
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Originally Posted by AtomicNo13 View Post
Why is this such a miserable task for us?
Unbiased, expert, science-based information on tires is nearly impossible to find. On the other hand, anyone can spew opinions that obscure what little solid data does exist.

Trailer tires are specialty tires produced in limited quantities and are not treated as seriously as other tires by dealers and manufacturers.

95% of the trailer tire market is extremely cost sensitive and unconcerned about quality. Most of these tires are used in non-critical, short distance, low speed applications. The market for high quality trailer tires is very small, some horse trailers, a few RVs, a few boats that are trailered frequently.
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Old 03-30-2015, 05:53 PM   #8
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Originally Posted by switz View Post
Andy at CanAm typically installs the Michelin LTX (P) 235/75R15 XL tires with a derated for trailer use load capacity of 1,985 pounds per tire. That means six of these will support 11,910 pounds.

The last year the wide body 34' Classics were officially made (2011) they had a GVW of 11,500 pounds with a factory tongue weight (which is a notoriously low number) of 710 pounds. The literature empty weight was around 8,126 pounds.

Unless one loads the trailer up with old engine blocks, it would hard to imagine more than 2,000 pounds of "stuff" inside. Thus the axle supporting load would increase from (8,126 - 710) to 7,416 pounds to perhaps 9,400 pounds. That load is within reason for the six 15" Michelins.

The older narrow body units were lighter and had a lower GVW.
Would new engine blocks weigh less? Old ones are soooo dirty!
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Old 03-31-2015, 01:45 AM   #9
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Dirt can be heavy.
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Old 03-31-2015, 10:02 AM   #10
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My concern as a x2 triaxle owner is not so much the load carrying ability, as much as the sidewall strength during maneuvering! Ever watch a triple axle Airstream back into a parking space? Certainly looks like something will rip off!
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