4th Tire Failure - This is getting old - Fiberglass RV

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Old 11-12-2012, 12:14 PM   #1
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Rich S's Avatar
Trailer: 2006 Casita Liberty Deluxe 17 ft
Posts: 26
4th Tire Failure - This is getting old

So,..I just had my 4th (count’m) tire failure. I originally had the Goodyear Marathon’s on my trailer. They both developed ply separations within days of each other. I then upgraded to the Goodyear Load range D trailer tires. They were less than two years old. This past August coming down a hill, a chunk of tread (approx 18” by 6”) came off one of the tires. I was told it was an anomaly so I replaced the tire. Then, yesterday coming back from the coast, someone left a note on my windshield at a restaurant saying to check my trailer tire as it looked about to blow. Sure enough the inside corner had a huge expanded section ( like a bubble) about 12” long by 4” wide by about 2” high) that encompassed part of the sidewall and part of the tread. Of course it was dark, pouring rain, and cold as I jacked up the trailer and changed the tire.
Needless to say I am now skeptical about these tires too, as I need to replace one of them, maybe both, but the other one is only 3 months old.
The other issue is that I have heard numerous times that the tire pressure should be maxed out. So,.. if you have a tire with a 3,500lbs capacity and you are pulling a 3,000lbs trailer, then yes I can see increasing the tire pressure. But if you have a tire with a 5,000lbs capacity and you are pulling a 3,000lbs trailer does the tire still need to be maxed?
Any ideas, comments, suggestions, re tires or pressure welcomed.


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Old 11-12-2012, 01:17 PM   #2
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Name: Ken
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Might want to see if they are made in china. The popular slang on rv.net is china bombs for a search to help you decode the sidewall.

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Old 11-12-2012, 01:18 PM   #3
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Joe MacDonald's Avatar
Trailer: Trillium
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what actually is the weight of the trailer?
what is the temperature outside?
Are there any uneven wear patterns on the tire?
is there a posted minimum psi on the tire?

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Old 11-12-2012, 01:19 PM   #4
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Name: jim
Trailer: 2016 2ndGen Escape19 Prairie Schooner pulled by 2014 Dodge Ram Hemi Sport
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What ever is stamped on the tire is what you should use, do not start subtracting air if you think you are only using 50% of the tire capacity. Leave it full 100% all the time.
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Old 11-12-2012, 01:23 PM   #5
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Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
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If the middle of the tread is worn then it's 2 much air. If the sides are worn then it's not enough air. If the tread is evenly worn all across the tire then it is the correct pressure.

I would change brands and try a tire made exclusively for trailers.
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Old 11-12-2012, 01:42 PM   #6
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Name: Norm and Ginny
Trailer: Scamp 16
Posts: 7,070
We've run our Marathons at 100% of capacity and have never had a failure of our Goodyear Marathons in probably 40,000 miles and 5 years including a couple 1,000 of dirt road miles. We have a single axle Scamp 16 loaded to 2400 lbs.

You did not mention your tire size nor the tire pressure, that would help, however, depending on your tire, the load capacity can drop quickly, at 35 psi they could be down to 1500 lbs per tire.

Another factor is that the load does not split evenly depending on load and the road. As well it would be interesting to know the Casita's weight, the 17s can be very heavy for their size.

We just returned from a 315 day, 23,000 mile trip and our now preparing to leave for the winter. In the process I went to grease my bearings and was surprised to find one of the Marathons was unevenly worn, to the steel on the inside of one tire. The rubber was really worn but only on half the circumference. Definitely blow out material.

What had happened is that who ever previously greased the bearings had not adequately seated the bearings so the tire seemed to wobble on the hub causing the weird wear pattern. (When jacked up one could simulate the wobble by rocking the tire from side to side.) Fortunately though weakened it did not blow.

Your tire size and running pressure would be interesting.
Norm and Ginny

2014 Honda Odyssey
1991 Scamp 16
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Old 11-12-2012, 01:54 PM   #7
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Name: Jared
Trailer: 1984 19' scamp
Posts: 1,610
Good luck. I just got new tires for the scamp. I was going to run LT235/75/15's as I have had nothing but bad luck with ST tires. The tire shop swore their tires are great (of course). I decided to try them, now I'm wishing I hadn't. I might put them on the car trailer, and get LT's on the scamp. I would hate to see what a blown tire does to a scamp, there wouldn't be much left.

I just accept that I'm blowing 1-2 tires every long trip with the car trailer. I run max p.s.i., no matter what. I also feel the hubs for overheating, and check tire pressure at every gas stop (200 miles). Doesn't matter, they still let go.
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Old 11-12-2012, 03:04 PM   #8
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Trailer: Trillium 13 ft 1973
Posts: 265
Tire wear

I continue to be the only ( I think ) trailer user running nitrogen fills on the tires on both trailer and tug.
The tires never get hot ...and rarely need a top up because the gas does not heat and cool and thus bleed out at the end of a long trip. We do the Canada to Florida I-75 run annually and stay with the traffic at 70mph and the tires are cool to the touch at each gas stop.
It is a bit of a nuisance getting the top-ups, but more tire dealers south of the border do nitrogen than up here in the great white north.
There's another bonus with nitrogen...it does not hold water in suspension so no rust on rim issues.
According to the website, you get one extra year's life on the tires- more than enough to offset the $7 fill charge at outset.
I get my hitch guy to "re & re" the wheels and service the bearings before we head south...and check the inside walls of the tires...and I replace the tires every three years regardless (cheap peace- of- mind insurance).
Alistair & Inge in The Road Toad (eight weeks from The Keys and counting)
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Old 11-12-2012, 05:02 PM   #9
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Name: Jared
Trailer: 1984 19' scamp
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Air is already 79% nitrogen. Check out the studies, after sitting for a year, there's less than a 2 p.s.i. difference in loss between air and nitrogen.

I've never had a rim rust out, that wasn't filled with chloride.

The only thing it has, is less of a pressure swing with temperature. I used it racing, because it made a difference in handling. Those tires spun so much on the dirt track though, you couldn't even touch them after a race. An extra years life on tires? Maybe in the ideal world. Mine will sun crack, or just plain blow up long before that matters, and nitrogen isn't going to stop that.

Nitrogen doesn't make a tire run any cooler.

Each to their own, but I see zero benefit in it.

Personally, I think speed and road temperature are the main culprits. I refuse to putter around, endanger the road, and add 3 hours to my trip. As such, I lose tires. I think switching to LT's will end that, myself. We'll see how these ST tires do.
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Old 11-12-2012, 07:57 PM   #10
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Name: Dave & Paula Brown
Trailer: Lil Snoozy
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I and a friend of mine, have had similar problems with our car haulers that had Carlisle Road Tracker tires, and with Marathons (ST235/75 15 D-range tires) on them, set to just 5psi below MAX tire pressures. The tires literally exploded and or tread separation occurred while just sitting unloaded in the Arizona sun. I lost 4 of them less than a year old and with 4 thousand miles on them. My Toy hauler trailer has my Michelin take-offs on it from my Dodge Ram, and have not given me any problems with 80 psi in them. They were put on after I have had nothing but trouble with new trailer tires on it. My Scamp 13' has had very good luck with HI-RUN ST 185/80-D 13, with 5lbs less than MAX of 65lb psi in them. I just keep a close eye on tire wear & pressures, and replace them every 3 years. I noticed uneven inside tire wear after a 9 thousand mile trip this past summer, so now a new axle sits under it. I now keep the "Trailer Tires" in the garage to be out of the sun, but the Michelins stay outside and show no signs of breakdown, but they will be replaced as soon as my truck tires need replacing.
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Old 11-12-2012, 09:34 PM   #11
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Name: Michael
Trailer: Li'l Hauley
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Wow. I just shake my head in amazement when I hear of folks having a lot of trouble with trailer tires. I never have. I had one tire go that may have been a blowout, or maybe it had a nail and went flat... couldn't tell, it was chewed up by the time I realized and stopped. One "maybe" in close to 150,000 miles of trailer towing. I just get whatever trailer tire brand the nearby tire store is stocking at the time; the brands change, but come to think of it, none have been Goodyear FWIW. Carlisle, Hi Run, several others I can't recall.
To every thing there is a season, and a time to every purpose under the heaven... --Ecclesiastes 3
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Old 11-12-2012, 09:39 PM   #12
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Name: Jared
Trailer: 1984 19' scamp
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It depends on what you're towing, also. I'm guessing I might get away with the ST trailers on the scamp, because it's so light.

On the car trailer though, different story. Put it this way...I have a 15+ year old LT 235/75/15 tire on it, weather checked, you name it. the 5 ST tires on it (2 spares), are all less than3 years old, except for one, which is 4-5 years old. Logic dictates that I should replace that LT tire, but the track record shows...it's no more a gamble than a new ST tire.
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Old 11-13-2012, 06:05 AM   #13
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Name: Bob
Trailer: 1973 Hunter Compact II
Posts: 7,914
It sounds like it might be worth looking at axle alignment on those trailers that seem to be eating tires on a regular basis.

Years back I knew of an Airstream with dual axles that kept eating tires every 5000 or so miles and the problem was traced to worn components that allowed one axle to be out of alignment with the other axle as well as not square to the frame. Repairs to the axle solved the problem.

I don't know how to determine if the axle is properly aligned, but a frame alignment shop may have a magic method.

Accepting that you will blow tires doesn't seem like a good idea to me, but I am sure that the professional tire peeps at Joes Discount Tire and Hubcap Emporium appreciate the extra business......
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Old 11-13-2012, 06:21 AM   #14
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Name: Alfred
Trailer: 2014 Escape 5.0TA / 2010 Nissan Frontier
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Hi: Rich S... When you bought all the tires did you check the Mfg'd. date (2412)eg. molded into the side wall? The week and year of mfg. It's usually on the inside so you need to get under the trailer. Sometimes tires are old before you get 'em and they're not like wine...improves with age.
Alf S. North shore of Lake Erie

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