Tires - Page 2 - Fiberglass RV


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Old 05-01-2013, 09:59 AM   #15
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AMAZING!.... But, anyway, I still say Byron got it right.
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Old 05-01-2013, 10:14 AM   #16
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Originally Posted by Roy in TO View Post
That is a great sensible document on trailer tires, thanks for linking to it.

I do wonder why they can't, or don't, manufacture tires to last longer than 5 years. I guess maybe car tires are the same, we just tend to replace them more often due to wear.
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Old 05-01-2013, 10:40 AM   #17
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Originally Posted by Jim Bennett View Post
That is a great sensible document on trailer tires, thanks for linking to it.

I do wonder why they can't, or don't, manufacture tires to last longer than 5 years. I guess maybe car tires are the same, we just tend to replace them more often due to wear.
The issue of presently manufactured tire longevity aside,there may never be a better tire made.

Those who advocate laws for tire replacement by build date and those who refuse to mount tires based on time rather than condition, may see to that. They hold all tires to the standard set by a small number of the worst tire under the worst possible conditions.

That sort of thinking, allowed to flourish,would be the end of all research and development.
Why should a company produce a superior product if it is forced to perform only at the "lowest common denominator" level?
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Old 05-02-2013, 07:39 PM   #18
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Originally Posted by Roy in TO View Post
From the Carlisle site:
http://www.carlisletransportationpro..._Practices.pdf
I learnt a few things:
– 3 to 5 years is the average life expectancy of a trailer tire,
regardless of mileage.
– Maintain air pressure at the maximum PSI recommended on the
tire sidewall.
What the first item tells me is that I should not take the second item seriously.
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Old 05-02-2013, 07:49 PM   #19
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Interesting comments on inflation recs issuing from the Escape builder.
I have noticed that Escape uses ST205/75R14 tires on all trailer sizes (4 of them on the heaviest models, the 19' and 21' models) while Scamp uses "13” C load radial" (ST185/80R13?) on all models... even the 19' which would overload those tires by over 500 pounds per pair at GAWR. It does not surprise me that the two companies might have different approaches to tire inflation.
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Old 05-02-2013, 07:55 PM   #20
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Originally Posted by alan in alberta View Post
This might be a good topic after 30,000 kms or so.

If it has too much air the middle of the tread will be worn and if not enough the outside edges will be worn.

ready ...set ....get camping

I'll be waiting for the results .....lol
You beat me to it! I was looking at my truck tires today and decided they were a bit underinflated. Or wife was driving too fast around corners. lol.

Underinflation causes global warming.
Overinflation causes global cooling.
So let's all get with the program. I'm freezing here.
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Old 05-02-2013, 08:35 PM   #21
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Originally Posted by alan in alberta View Post
This might be a good topic after 30,000 kms or so.

If it has too much air the middle of the tread will be worn and if not enough the outside edges will be worn.

ready ...set ....get camping

I'll be waiting for the results .....lol

That may be true for automobile and truck tires that get a lot of tread wear. Single axle trailer trails don't wear the tread out. I replaced mine after 5 years (somewhere around 30,000 miles) and there no noticeable tread wear. Current tires have well over 20,000 miles in two years, tires look brand new.
The way to tell if the trailer tires are under inflated is that unmistakeable sound of a blow out and melted tires.
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Old 05-02-2013, 09:09 PM   #22
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Originally Posted by Brian B-P View Post
I have noticed that Escape uses ST205/75R14 tires on all trailer sizes (4 of them on the heaviest models, the 19' and 21' models) while Scamp uses "13” C load radial" (ST185/80R13?) on all models... even the 19' which would overload those tires by over 500 pounds per pair at GAWR. It does not surprise me that the two companies might have different approaches to tire inflation.
My tires are rated for 1,760 lbs at 50psi, and that is where I run them. Times four, that is 7040lbs capacity. Should hold my trailer up fine....just sayin'.
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Old 05-02-2013, 09:13 PM   #23
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Originally Posted by Byron Kinnaman View Post
Current tires have well over 20,000 miles in two years, tires look brand new.
Pretty much where mine are at now, distance and appearance wise too. Four years old now, seems a shame to change them next spring, but I will.
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Old 05-02-2013, 10:27 PM   #24
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Pretty much where mine are at now, distance and appearance wise too. Four years old now, seems a shame to change them next spring, but I will.
I know the feeling. After all these years of looking at the tread on automobile tires now we have to look at the date instead for the trailer.
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Old 05-03-2013, 07:27 AM   #25
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Pretty much where mine are at now, distance and appearance wise too. Four years old now, seems a shame to change them next spring, but I will.
In my mind, all the more reason to buy tires that are better than ST. As in LT or commercial.
As far as I can tell, ST tires are, simply put, "built down to a cost", and part of why they can be, is because they don't carry passengers. Having said that, I have been told by a tire engineer ( a man I trust what he says ) that even though ST tires don't necessarily "have to" meet the same standards as tires rated to carry passengers, most of them "would pass" those standards.
The trouble is, it can be hard to suss out which ST tires are good vs those that are cheap charlies that are ready to fall apart immediately.
It seems that among the ST tires, Maxxis 8008 are developing a pretty good reputation.
GoodYear claims on their site that a Marathon at three years should be derated in load capacity by 30% if I remember the number correctly. For me personally, that is just unacceptable, when I can buy a reasonable alternative.
As a real general trend, I would say you owners of FGRV's probably have fewer tire failures simply because your trailers weigh less.
Again, y'all buy what you want, I know where I am directing my dollars on this subject.
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Old 05-03-2013, 09:20 AM   #26
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Goodyear Marathons

George,

I've used Goodyear Marathons for the last 6 years and we are now on our second set. We have never had a failure and are on the road 7-11 months a year with a fair percentage on rough roads.

Goodyear's warranty is for four years. I have never read that they need to be derated by 30% after 3 years. As a user I would appreciate it if you could document this claim. I have not found that statement on their RV tire site, one that is well worth reading in its entirety.

Goodyear RV Tires

There are various guides and FAQ on this site. For people who do not use their tires frequently, there are many good suggestions on how to maximize tire life.

I found the following particularly interesting because we are people who regularly use our tires and this promotes longer life.
  • Usage per year - more frequent usage will result in longer life
  • Vehicle storage practices (6 months loaded with little or no rotation is not good!)
  • Usage in warmer climates can also impact a tire's overall life due to greater extreme ozone exposure
Like everyone else on the site I do not want a tire failure on my trailer. I pay careful attention to them including the mounting of tire pressure and temperature sensors.

Goodyear Marathons have worked for me.
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Old 05-03-2013, 11:42 AM   #27
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Norm raises a good point regarding tire life. Personal experience with current trailer using a set of LT's and ST's is they have failed long before the tread showed much sign of wear. In both cases there was no blow out - simple tire inspection while getting gas showed they were starting to crack badly between the treads & had I carried on there was a good chance they would come apart very soon. In both cases the tires had been checked by a tire shop prior to the trips and balanced and deemed to be fine. I also do check the air pressure often.

In the case of the LT's they were on the trailer about 4.5 years. In the case of the ST's they were on the trailer 3 years and 3 months. In both cases I was on long trips and the problem was noted in an area with *very* limited options as to what they could be replaced with - one tire shop towns and the next town a great distance away. So no option but to take what they had on the shelf, not possible to choose a different brand/type.

In both cases the tire shops that did the change overs suggested that one should not expect a tire trailer to last nearly as long as a car tire for the simple reason trailers tend to sit for much longer periods of time than car tires. If sitting out in the sun in one spot they will be subjected to a higher amount of UV damage in the spot the sun is continually hitting - which was the case for the LT tires that were on the trailer when I purchased it - the trailer had been sitting for 2 years or more in the Idaho sun with very little use. Another cause I was told that if sitting in a damp climate in one spot they will start to root out from the inside. I live on the wet coast so that may have been part of the issue with the ST's that replaced the LT's.

Based on the above I am not going to leave a set of tires on my trailer any longer than 4 years and will start shop around at home where I have more options as to what to replace them with once they hit 3 years of age regardless of how good they look.

Thats just been my experience with tires in recent years and I am not a tire expert. I know there are people here who have gotten a lot more years out of their trailer tires and lots of suggestion as to why.
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Old 05-03-2013, 12:14 PM   #28
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Originally Posted by honda03842 View Post
George,

I've used Goodyear Marathons for the last 6 years and we are now on our second set. We have never had a failure and are on the road 7-11 months a year with a fair percentage on rough roads.

Goodyear's warranty is for four years. I have never read that they need to be derated by 30% after 3 years. As a user I would appreciate it if you could document this claim. I have not found that statement on their RV tire site, one that is well worth reading in its entirety.

Goodyear RV Tires

There are various guides and FAQ on this site. For people who do not use their tires frequently, there are many good suggestions on how to maximize tire life.

I found the following particularly interesting because we are people who regularly use our tires and this promotes longer life.
  • Usage per year - more frequent usage will result in longer life
  • Vehicle storage practices (6 months loaded with little or no rotation is not good!)
  • Usage in warmer climates can also impact a tire's overall life due to greater extreme ozone exposure
Like everyone else on the site I do not want a tire failure on my trailer. I pay careful attention to them including the mounting of tire pressure and temperature sensors.

Goodyear Marathons have worked for me.
I'll have to dig for it Norm. It is a tech service bulletin to dealers, which is generally not east to find on the net, but it's there. I used to have the document saved, but I think it got lost/deleted when I bought a new computer last year. I'll look for it later.....need to head down to the barn right now, will be away from the computer for the next 8 hours or so.

george
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