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Old 02-15-2015, 04:08 PM   #15
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I am not sure the derate of 1.1 really applies to something that has such and low center of gravity as an Airstream you either way you have plenty of margin. My trailer tops out at 7000 lbs and I have had no issues with 235/75-XL15 tires. Trailer tires have a pretty easy life compared to car tires.

A trailer tire is like the rear tires on a front wheel drive car.

Perry
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Old 02-15-2015, 10:31 PM   #16
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Bottom line. An owner is responsible for the overall safety of their trailer and FMVSS regulations are not binding on them.

FMVSS regulations are the minimum requirements that vehicle manufacturers must abide. They are not written for the public at large to use as they see fit.

When the RV trailer manufacturer does the final certification on a trailer the minimum requirements for tires on that trailer are printed right on that label. If the trailerís manufacturer has not made provisions for optional tires there are none, without their recommendations.

Tire industry standards do not allow for using replacement tires with less load capacity than the OE tires. Only owners or unscrupulous retailers will do such a thing. Strong words, but accurate.


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Old 02-16-2015, 06:33 AM   #17
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BA,

Your post here, and those in the past concerning tires, sound like the voice of experience, which we all appreciate.

What tires are you running on your trailer?

Thanks.

John
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Old 02-16-2015, 01:30 PM   #18
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Black Aces has a valid point. But the ST tires don't seem safe. I have read a lot of posts telling of tire failure. I will take my chances with the LTX's. They seem to be getting positive reviews.


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Old 02-16-2015, 03:12 PM   #19
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Quote:
Originally Posted by BlackAces View Post
Bottom line. An owner is responsible for the overall safety of their trailer and FMVSS regulations are not binding on them.

FMVSS regulations are the minimum requirements that vehicle manufacturers must abide. They are not written for the public at large to use as they see fit.

When does the final certification on a trailer the minimum requirements for tires on that trailer are printed right on that label. If the trailerís manufacturer has not made provisions for optional tires there are none, without their recommendations.

Tire industry standards do not allow for using replacement tires with less load capacity than the OE tires. Only owners or unscrupulous retailers will do such a thing. Strong words, but accurate.


BA
Tell us who is going to pay for the wheel well when the ST china bombs that the RV trailer manufacturer recommended explodes? Your going to look hard and long to find a LT that exploded for no reason.
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Old 02-16-2015, 04:05 PM   #20
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Yep. $2500 worth of damage when an ST tire blew out and penetrated the wheel well into all the kitchen plumbing. Never again...good thing the insurance (USAA) covered it.


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Old 02-16-2015, 04:08 PM   #21
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Hours about tires

Time for new rubber for the trailer. Like most folks here, I have read for hours about tires.

I have been running U.S. made GYM's on my 34 for about 37,000 miles. They have not be a problem. After 5 years, they are aging but mostly they are about worn out...34's are fairly hard on tires due to the pronounced scrubbing of the rears when turning. I rotated them twice but they are about used up. Just decided to look at other options this time.

Not trying to highjack this thread, I have a method to my madness.

I was all set to put Maxxis 225-75-15 E rated tires on, then found this thread and the good reports on the Michelin LTX 235-75-15.

I am staying with the 15'' wheels, and have run Michelin's on my cars and trucks for years. Great tire.

Am I correct in assuming that this particular Michelin is a D rated tire?

The GYM are D's. I credit the 3rd axle to spreading the load better than a double axle. My 34 grosses at 9,000, we travel at about 8,000. Tires at 50 psi.

Did a little price shopping at Discount Tire web site. The Maxis sells for $135, the Michelin $118. Hmmmm.

It is never good to pay too much for something but often worse to pay too little.

Does the Michelin cost less because more are made, or does the Maxxis cost more because there are fewer made?

Where does this price difference come in.

Thanks.

John
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Old 02-16-2015, 04:51 PM   #22
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John,
The price difference comes in when you have a blowout.

What does the data plate on your trailer read? I'd be willing to bet your trailer came with load range C tires at 50 psi from the factory. A load range D tire at 50 psi carries the same load as a load range C tire at 50 psi.

The P235/75/15 Michelins LTX MS/2 are XL (extra load) Passenger tires. They have the same derated load carrying capacity as an LT 235/75 15 load range C tire.

Another option would be LT 215/75 15 Load range D GoodYear Wrangler HT. They are rated at 2,096 lbs at 65 psi. You can ask CWF about them.
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Old 02-16-2015, 05:05 PM   #23
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Ue-168

Sandlapper,

I have been using a Maxxis UE-168 for the past 25,000 miles and 7 years. They are getting old now, but look brand new (I keep them covered all the time). I've been very happy with the Maxxis. They are both LT and ST rated, and are a commercial tire. Oh, size is 235/75-15". They are D tires. I stumbled across them by accident, but have had great success with them.

Looking to replace soon. Am not sure if I want to plunk down the cash to buy six new 16" or maybe even 17" wheels, or just get another set of these. I'm a big Michelin fan, and like BFG a lot too. But these Maxxis have been good tires for me. I run 60psi even and have had an ink pen on the table and 500 miles later, it was still there.

See you on the road,
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Old 02-16-2015, 05:58 PM   #24
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Thanks, gents, for your replys.

Stock was/is 225/75/15, 50 psi according to the plate. I assume D rated. Trailer is a '93 so likely GYM's, which are D's.

As mentioned before, I've had no trouble out of the GYM. Just going a different route this time. I would prefer the Michelin over the Maxxis, even tho the Maxxis is also a good tire.

The red flag went up when I saw the Michelin was less expensive. Never been one to buy cheap stuff, especially tires, of any kind.

5 years ago I spent months reading, pondering which tire to run and settled on the Marathon, contrary to most. No complaints. I specified US made, fresh, and that's what I got. They have served well.

Time to do it again. Already been pondering it for months.

Probably gonna be the Michelins.

Thanks all.

John
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Old 02-16-2015, 06:10 PM   #25
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Sandlapper/John - at 1984# derated capacity per tire (the 15" Michelin is P rated and on a trailer has to be derated 10%), 6 gives you 11,904 of load capacity and 9000# (on the scales? ) leaves about 25% headroom.

I don't know how much scrubbing and sidewall twisting you see on a tri-axle. I have a dual axle and sometimes when backing in, I do wonder if I'm ever going to pop a bead and lose the tire off the rim. So far so good - but it's a thought....

Good luck!
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Old 02-16-2015, 07:27 PM   #26
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Thanks Steve, one (good) thing I have heard about the ST tire was they could take the extra twisting and side forces put on the tire in typical trailering situations.

I too wonder about those sharp, twisting back ins. The rears on the 34 get a pretty good work out, even on a moderate turn in a parking lot.

One more thing to consider.

John
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Old 02-16-2015, 07:33 PM   #27
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John,
If the data plate reads 50psi, then it came with Load Range C tires.

You won't have a problem with the Michelins.
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Old 02-16-2015, 07:38 PM   #28
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The controversy with the ST tires seems centered on the lack of consistency in manufacturing and concerns with process/materials in (highly UNregulated) Chinese facilities. I have not been able to locate Load Range D ST tires manufactured in the US or Canada.

I have the P LTX Michelins and am happy with them. If Michelin made a 15" Load Range D ST tire, I'd buy them.
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