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Old 07-31-2008, 11:02 AM   #407
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Man this thread has my HEAD spinning!!!! I have to get new tires for my 66 SAFARI - 225/75-R15's , & everyone I have gone too is telling me to get the MARATHONs. No way- I say. What else is out there? I just called tire rack & they do not have or sell a Light Truck tire in that size with a D or E rating....
If I switch to a 16- I could rub the wheel well when going over bumps!! HELP!!!!!!!!!!!
one word...............MAXXIS
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Old 07-31-2008, 11:09 AM   #408
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Originally Posted by Chitown AirStreamers View Post
Man this thread has my HEAD spinning!!!! I have to get new tires for my 66 SAFARI - 225/75-R15's , & everyone I have gone too is telling me to get the MARATHONs. No way- I say. What else is out there? I just called tire rack & they do not have or sell a Light Truck tire in that size with a D or E rating....
If I switch to a 16- I could rub the wheel well when going over bumps!! HELP!!!!!!!!!!!
I think it's wise to look at Jaxon's statement above. From a scientific perspective, for various reasons already listed several times on this thread, I do not believe we can call the reports on this thread a "representative sample."

Like Jaxon, I am not defending or attacking the Goodyear Marathon, I'm just pointing out that this thread is not a scientific poll. I DO believe this thread has a lot of great advice on how to chech your tires (of ANY brand) and some things you can do to perform preventive maintenance and perhaps avoid some potential issues (on ANY brand).

Anecdotally, I can say that I have run Goodyear Marathons on my boat trailers for over a decade and not experienced any failures with them. I also just completed a recovery mission of around 700 miles for my new-to-me '63 Overlander that has 4 Marathons on it that I believe are about 3 years old (Terry can correct me if I'm wrong ), and they rode perfectly with no signs of tread separation or any other degradation.

Take that for what you will I suppose, but only an industry-wide survey could really turn up the kind of data we'd need to perform an accurate and meaningful analysis.
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Old 07-31-2008, 11:09 AM   #409
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Originally Posted by Chitown AirStreamers View Post
Man this thread has my HEAD spinning!!!! I have to get new tires for my 66 SAFARI - 225/75-R15's , & everyone I have gone too is telling me to get the MARATHONs. No way- I say. What else is out there? I just called tire rack & they do not have or sell a Light Truck tire in that size with a D or E rating....
If I switch to a 16- I could rub the wheel well when going over bumps!! HELP!!!!!!!!!!!
There are several other brands of tires available.

You do the math.

So Marathon had a problem, years ago.

Since the vast majority (thousands) of Forum members have them, and if you had a 1/10th of one percent failure, then they would so state that, as they have.

When your asking for another brand, having the same failure rate, then 1/10th of one percent out of 100 owners, will not cause any reporting, such as with the Marathons.

Proper tire PM, is the magic words.

Proper inflation, and proper tire, wheel, hub and drum, as an assembly balancing is the key.

16" wheels are asking for a tire fire, if it rubs the wheel wells, as it more than likely would.

Andy
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Old 07-31-2008, 11:15 AM   #410
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Tire Safety Issues

Hopefully this hasn't been repeated here, but an interesting report on Tire Safety in the USA...we don't follow same rules or protocol as Europe. Check those dates when you buy....and replace every few (couple) of years
http://abcnews.go.com/Video/playerIndex?id=4826897
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Old 08-01-2008, 09:17 PM   #411
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OK, dangit. I just finished reading this entire thread. I now officially have red eyes and a headache and Iím about to start asking questions.

Get yer flames ready....
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Old 08-01-2008, 09:36 PM   #412
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The dry weight of my í73 Overlander is about 4500#. The max weight of the trailer fully loaded should be no more than about 6300#. Based on those numbers, the load on each tire with a fully loaded camper is just under 1600# per tire (minus the tongue weight, etc). Now, take a look at the chart in Scott Sís post number 259. That chart tells me that I can use a regular Load Range B tire (max load, 1760# per tire) for my camper. That gives me a 20% safety margin of load on the tire (If I understood that part of the thread correctly). Thatís essentially the same tire thatís on my F150. SO, why would I need to upsize my McTires to a LR D or LR E?

As Ricky would say: Ďsplain to me why Iím wrong?

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Old 08-02-2008, 02:18 AM   #413
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Jim & Susan,

There is nothing wrong with your analysis.

I will give you a few of my thoughts on the subject.

(1) Forget bias tires unless you are after a certain old look for a restoration.
(2) I would pick a LR "D" (trailer or light truck radial) which is 2540 lbs per tire(Rubber Manuf Assoc) at 65psi. 2540x4 = 10160lbs. 6500-500lbs for the tongue weight is 6000lbs/10160lbs = 60% load factor on four new tires.
(3) I would run them at the 65psi cold inflation with some type of low pressure warning system.
(4) I would not play with lowering the inflation pressure (which you could for ride, etc)
(5) Accept no date codes over 3 months old at time of installation. (this will be an issue with a slow economy)
(6) Use steel valve stems
(7) At 5-6 years, replace them.

I also try to never run over the curb side white line where most of the debris accumulates. A LR D light truck will have the same stronger bead that is in the ST trailer tire for sidewall stress during turning.

I don't think brand makes much difference on a trailer application where rolling & braking are about all they do. If it were on a turbo diesel pickup, then brand might become more important.

Just my $.02
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Old 08-02-2008, 08:18 AM   #414
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Quote:
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OK, dangit. I just finished reading this entire thread. I now officially have red eyes and a headache and Iím about to start asking questions.
Way too funny!

I made it through part ways... once... and still didn't find the "holy grail" of tiredom... guess the perfect tire is in the eye of the beholder... on on the wheel of the great aluminum one...
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Old 08-02-2008, 09:42 AM   #415
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Jim,

In theory you are correct. Reasons to go a LR C or higher tire:

Excess capacity if one tire goes flat. On a dual axle trailer chances are good that you will not immediately notice a flat. Excess capacity means that you will not dramitically overload the remaining tire on that side.

You have not measured the actual weight that each tire is carrying. You are just assuming that the weight is equally distributed. It is not.

Given the seemingly high failure rate of trailer tires it is probably wise to go with excess capacity.

Scott
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Old 08-02-2008, 01:31 PM   #416
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Thanks for the replies, guys. So, where does everybody go to weigh the load distribution on a per tire basis? I assume that would take a pretty fancy set of scales.

Right now. I'm leaning toward an LT tire. I'm more than a bit scared of the ST tires. Reasons for this are:

1 ST's just don't seem to be very well made.
2 Reasonable sidewall stiffness in a Load Range C Truck Tire.
3 My Airstream is much lighter than more modern models
4 Easier to find which means easier to replace if you are in an emergency
5 Much better made tire (apparently)
6 I've never had a passenger car or truck tire "fail" (yes, I've had flats, never a failure). And I'm willing to agree that this is a weak point in the argument.

I'll keep looking and reading and let y'all know what I do.

This is a great thread. Thanks to everybody that contributed to it.

Jim
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Old 08-02-2008, 01:48 PM   #417
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ARE LT tires safe to run!?
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Old 08-02-2008, 02:04 PM   #418
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ARE LT tires safe to run!?
The short answer is yes. BUT, there's a lot of "BUTS" to consider. Go back to post 338 and read the discussion there. Actually read this entire thread, take some notes. Also read this thread: http://www.airforums.com/forums/f438...ad-e-7068.html There are other threads to look at as well. Folks here are more than willing to answer your questions. Do your homework, ask questions, then decide if LT's will fit your situation.

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Old 08-02-2008, 02:09 PM   #419
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ARE LT tires safe to run!?
A number of members have used LT tires that are rated for commercial uses. The BFGoodrich Commercial TA 16" tire has a following but no longer comes in a D load range, only E load. Bob Thompson's "Tires, Tires, Tires" thread has some really good info in it and it is long.
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Old 08-02-2008, 02:26 PM   #420
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while i understand the motivation to change wheel size and use creative tire options...

it's a significant dollar commitment to do wheels, tires and a spare.

but this is one of the problematic issues for those who go that route.

Quote:
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...16" tire has a following but no longer comes in a D load range, only E load...
so if a non repairable flat happens and a matching spare isn't at hand...

these folks will be faced with trying to find another brand/model that does match...

or mixing various LT tires by brand, size or load rating.

while the market for st tires is small,

the market options for creative replacements is REALLY small.

at least gyms are still readily available in sizes that are common to our needs...

the gyms have worked 4 my trailer, and i like the max' option is an st tire.

cheers
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