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Old 06-17-2016, 10:16 AM   #43
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Originally Posted by m.hony View Post
Hmm...
I wish you had asked me about Hwy 82...
Yeah, that makes 2 of us
I was talking with the park host and they asked which way we were going and they told us that we could go through town to get to Hwy 82 instead of the way the GPS had brought us in. He never mentioned that Hwy 82 was in such bad shape. Having to travel it in that downpour that flooded Arkansas didn't help either, a definite test of driving skills.

Live and learn, I won't forget that road in our future travels.
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Old 06-17-2016, 10:47 AM   #44
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I pretty much avoid the southern half of Arkansas.
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Old 06-21-2016, 10:13 PM   #45
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Not going to try to look it up again but I have seen the Goodyear information that said to pump them up to 75 psi for speeds above 65 mph. It is pretty old information.

No, I am not doing it. I would not do it. Neither pump them up to 75 or run faster than 65 with them.

But what do I know. I have a fairly light weight Airstream. (6400 lbs axle rating) I run P-XL tires on my Airstream at 50 psi and they are rated to a lot faster than I want to go.

The +10 psi does NOT apply to P type tires but only GY Marathon. No other brand or type tire is covered by the GY document. The +10 psi also does not increase the load capacity.
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Old 06-21-2016, 10:15 PM   #46
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It is my belief that the inflation pressure in the tables is the minimum pressure to support the stated load, not the maximum, and one can inflate up to the maximum pressure on the sidewall without negative effect on the tire. But like others have stated, I don't have to worry about this because I put on the 16" Michelins.

Al

Correct re minimum and maximum
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Old 06-21-2016, 10:19 PM   #47
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"Goodyear doesn't know what load is placed on the tire, or what additional stresses (tandem axles, etc.) are imposed. Airstream does."

I agree that GY does not know what load is applied in an eventual application. It must be up to the application builder to determine that and then using information from the tire manufacturer determine the tire and its pressure. As far as AS knowing the stresses, I don't know how they would. They told me that they do not have dynamic models of the trailers and they do not appear to be the type of company that would go and actually measure some technical data.

Maybe they need to read some technical papers if they are not going to do the basic engineer I would expect of a vehicle manufacturer.

You can learn more about the special loading on tires on TT with multiple axles if you Google "Interply Shear tires"

Maybe someone can tell AS about how Google works.
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Old 06-21-2016, 10:24 PM   #48
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Originally Posted by Howard L. View Post
Mark's info above is correct. Several manufacturers allow this, Maxxis and a couple others in writing. For example, I run Maxxis "E" rated ST tires on my 30 FC. Without looking at the charts, I believe the weight of my 30 requires somewhere close to 50 psi to carry the load. I keep the 4 tires at 75 psi so, when doing 70 to 75 mph downhill, I'm not concerned.
With the LT tires that many have gone to, the speed restriction is not a factor. But they have given up sidewall strength and thus some protection against side shearing forces. Take a look at your tandem tires during a sharp backing turn. That's one reason why ST tires are recommended for twin axle trailers. However, if you want to drive fast, buy LT tires.

Wondering... When you go down hill do you also run your engine 10% above the Redliine?

The shear forces of concern are not in the sidewall but at the edge of the belts. Basically sidewall failures are from low inflation. Belt separations are from excess Interply Shear forces on old, overheated belt rubber.
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Old 06-21-2016, 10:28 PM   #49
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I am scratching my head over the 2017 owners manual recommendations.

'The maximum speed rating on the tires installed
on your trailer is 106 MPH. Do not exceed this
rating. Failure to heed this warning could cause
catastrophic tire failure resulting in property
damage, personal injury, and/or death."

Really? 106 MPH"

Jason

That sounds just like a lawyer talking.
Clearly someone has no understanding of tire performance or vehicle dynamics. In RV service 75 is the Max according to major tire companies. Like Goodyear, Michelin, Bridgestone. You know the big guys that put their name on the sidewall of the tires they make.
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Old 06-22-2016, 11:36 AM   #50
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Originally Posted by Tireman9 View Post
That sounds just like a lawyer talking.
Clearly someone has no understanding of tire performance or vehicle dynamics. In RV service 75 is the Max according to major tire companies. Like Goodyear, Michelin, Bridgestone. You know the big guys that put their name on the sidewall of the tires they make.
That have money, insurance and lawyers to pay claims because they have a super store logo on their back. (And it isn't Walmart or K-mart)

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Old 06-22-2016, 11:48 AM   #51
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I have not read all the posts in this tread but have over the years read enough treads on GM to ask why would anyone ask a question about GM other than what to replace them with.

if you are a trailer owner running GM and have not yet had a GM blow you are a trailer owner that will have a GM blow out.
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Old 06-22-2016, 12:01 PM   #52
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^^^ And that is an opinion. May be an unpopular opinion on this forum.

I do not and have not ever had a Goodyear Marathon tire. Mostly because those tires have not come on the older trailers I have had. And I am not in the tire business at all.

However my guess is there are millions of those tires produced and many still on the road. And they are still being produced.

Are they great for every application? I doubt it
Are they the best tire? Not likely
Are they a high end tire? Nope
Are they good for your application? Only you can answer that.

However there must be some benefit that outweighs the cost of production because a company like Goodyear doesn't keep producing a bad product and stay in business over a 100 years. And if it was such a bad product or defective the NHTSA would have forced a recall long ago.

Maybe it is not good for you. That just doesn't mean it is not good for some one else.

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Old 06-22-2016, 12:10 PM   #53
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^^^ And that is an opinion. May be an unpopular opinion on this forum.

I do not and have not ever had a Goodyear Marathon tire. Mostly because those tires have not come on the older trailers I have had. And I am not in the tire business at all.

However my guess is there are millions of those tires produced and many still on the road. And they are still being produced.

Are they great for every application? I doubt it
Are they the best tire? Not likely
Are they a high end tire? Nope
Are they good for your application? Only you can answer that.

However there must be some benefit that outweighs the cost of production because a company like Goodyear doesn't keep producing a bad product and stay in business over a 100 years. And if it was such a bad product or defective the NHTSA would have forced a recall long ago.

Maybe it is not good for you. That just doesn't mean it is not good for some one else.

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Well said.
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Old 06-22-2016, 12:48 PM   #54
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Originally Posted by Action View Post
^^^ And that is an opinion. May be an unpopular opinion on this forum.


Are they great for every application? I doubt it
Are they the best tire? Not likely
Are they a high end tire? Nope
Are they good for your application? Only you can answer that.

However there must be some benefit that outweighs the cost of production because a company like Goodyear doesn't keep producing a bad product and stay in business over a 100 years. And if it was such a bad product or defective the NHTSA would have forced a recall long ago.

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Looks like I have been out opinioned 5 to 1. Maybe a picture will help. At 5 am they are hard to detect and luckily only did minor damage
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Old 06-22-2016, 02:17 PM   #55
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I can totally understand your opinion based on your experience. And let's assume for a bit without question that the tire was/is defective. Goodyear makes millions (I am assuming) of these tires. They are not immune from defects or bad assemblies or bad materials. Just like any other tire manufacturer or any manufacturer of any product or good. This is why companies have warranties to give them an opportunity to make good any defects in material or workmanship after an event based on a defective product. Manufacturers have a warranties so a potential consumer can feel at least there is some positive action that will happen before they buy a product. For a tire company like Goodyear that has been in business for over a century, they have a track record that they will be around next week, next month,next year and in the forseeable future. Not many companies have that kind of history. Making a bad product 100% of the time does keep that kind of track record.

Then there are other possibilities for the picture, not stating this is the cause. And know I am far from a tire expert however I do know that the environment that tires operate is a tough one.
Overloaded
Under inflated
Road hazard
Over aged
And likely others that escape me at this point.

The disagreement I have is your statement of, "if you are a trailer owner running GM and have not yet had a GM blow you are a trailer owner that will have a GM blow out." This statement is just untrue as it assumes EVERY GM tire is bad. It is a blanket assumption that you made and I am now assuming, you made based on your experience.

Just because you had the experience does not mean EVERYONE will have the same one. Likely there are millions of GM tires out there that would prove the above statement to be a gross exaggeration.

Good luck traveling.

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Old 06-22-2016, 02:43 PM   #56
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Talked to a couple two days ago. They have one of the Retro trailers. Later that evening we got started talking tires. They have Cokers with the white sidewalls. Told to not inflate them over 35psi. They mentioned that they have a sister with an AS who is headed to Alaska after a trip back and forth across the states. Seems they had three tire failures. I wonder?

Everyone travel safe. Pat
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