Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-08-2006, 08:15 PM   #155
Rivet Master
 
1960 24' Tradewind
santa barbara , California
Join Date: Apr 2006
Posts: 1,352
Hello ,
I read that tire info about the marathons ,epinions, well Ive looked on woodalls and rv.net and searched in depth researching tires for my 60 trdwnd. I did lots of reading etc. OK it looks like the marathons have a high rate of failure ,you just cannot dismiss so much evidence showing this to be true ,so many unhappy people . however , It seems that most of the sob manafacturers are using these tires so thousands are on the road . which means there will be more instances you will read about failures of these tires . That being said, what is the rate of failure say that inland andy has knowledge of with airstream trailers . they must not be having this much trouble with the marathons or I believe he would indeed say so . Airstream just might be matching the tires to the actual weight of thier trailers . As I said in an earlier post These sob trailers may be too heavy for the marathons too be able to handle .It would be a big help if we knew if the failure rates were are just as high with airstream trailers .By the way it does seem that the 16" tires and wheels are not an issue for the most part . Have not read much at all concerning them .

scott of scottanlily
__________________

__________________
scottanlily is offline   Reply With Quote
Old 04-08-2006, 08:55 PM   #156
Rivet Master
 
1984 31' Excella
Norfolk , Virginia
Join Date: Jan 2005
Posts: 667
Images: 11
Tires....Tires....Tires

Focus ladies and gentlemen. Let us not forget what we are on this thread to discuss. If there are so many complaints flying around shouldn't be obvious that there is a problem somewhere. Where there is smoke, there is usually fire.
I think I'll take a trip to my local UHaul Center and take a close look at their tires. Remember, they rent tandem axle trailers also. My friend the Demolition person that hauls a 12,000 lb Bobcat around on a tandem torsion axle trailer stopped having tire problems when the manufacturer of that trailer sent him a set of 16 inch wheels with LT tires of the same load range as the ST tires that were not holding up. The same drivers, trailer, load and tv were being impressed on the ST tires as was being inpressed on the LT tires, however, since the installation of the LT tires, no problems.

Action
Sorry to take so long to get back to you. I had a funeral and my grandaughters birthday to attend. I had to go over to where the bad tires were stored and get the DOT numbers off of them. They are as follows;
First failure, DOT WEHH89916012502
Second failure; DOTWEHH89916012802
which according to the NHTSA web site http://www.safercar.gov/tires/pages/...elPassVeh2.htm were made in the 25th week of 2002 and the 28th of 2002.
They were both load range D. The left rear tire had 1100 pounds on it and the right rear tire had 1300 lbs on it.
These weights were taken with West Weigh Portable Scales, 20,000 capacity, recently calibrated and with all wheels on 2x8s except for the two wheels on the scales to maintain the level of tv and trailer.
The local dealer told me over the phone that because I was not the original owner of the tire there was nothing he could do for me.
These tires were barely 3 years old if that when they failed.
Please remember these things:
1. The top speed rating of the Goodyear Marathon is 65 MPH. Reference http://www.goodyear.com/rv/pdf/rv_inflation.pdf
What this means is that any excursion over 65 MPH damages the tire, either by centrifugal force of heat. The Federal Government only requires ST tires to be tested to 65 MPH so that is what they are built to, period.
2. The speed rating is an overall test of the tires ability to generate heat, dissipate heat and stay together despite the heat that it cannot disipate.
3. Products change. The change is seldom to my liking, but they change. Todays big drivers of change in the tire industry as in most manufacturering industries is the EPA regulations, the bean counters trying to maximize profits for the share holders and the American Bar Association.
__________________

__________________
Beginner is offline   Reply With Quote
Old 04-08-2006, 10:05 PM   #157
Rivet Master
 
1984 31' Excella
Norfolk , Virginia
Join Date: Jan 2005
Posts: 667
Images: 11
Tires....Tires....Tires

Rog0525
Simply do as I did. Go into the shop manual and find out what size tire was originally installed on your unit. Email the manufacturer of that tire and find out what the outside diameter (OD) of that tire was and the width of that tire at its widest point on the same width rim that you now have on your unit.
Michelin or B. F. Goodrich site and see if they offer a tire with your od and width needs. In my case the original tire was the Michelin XCA. That tires OD and the max width of the Marathon ST225/75R15 are the same as the B. F. Goodrich OD and Max Width.
Simply put, same physically size tire, 16 inch rim.
Jim
__________________
Beginner is offline   Reply With Quote
Old 04-08-2006, 10:20 PM   #158
Rivet Master
 
1960 24' Tradewind
santa barbara , California
Join Date: Apr 2006
Posts: 1,352
Hello beginner ,
We are focused . The beginning of the thread headline is tires tires tires .Is that not so?At the end of my post I mentioned 16 inch tires ,one of your last post you talked about the bobcat trailer getting 16 inch tires . We know that the 16 inch tires will increase capacity as you have shown . the point is that not everyone is accepting that idea . There are concerns that everone wants to weigh in on . Hopefully everyone can get some info from this discussion and make a good informed decision.

Scott of scottanlily
__________________
scottanlily is offline   Reply With Quote
Old 04-09-2006, 12:02 AM   #159
Rivet Master
 
1987 29' Sovereign
Sparta , Tennessee
Join Date: Mar 2003
Posts: 507
Send a message via Yahoo to wingfoot321
I don't pay much attention to posts such as epinions because

(1) there is no statistical validity to the posts (2) only irate customers post,(3) there is no connection between Goodyear & Carlisle which two of the posts link for some reason? (4) 5th wheels I see on the road are rarely towing level so the back tires are carrying more load (5) many 5th wheel manuf. do not respect a reserve factor on tires, they want the smallest,cheapest, etc. (Goodyear is partially at fault for selling them the tires-they should pass on the business)

You guys are being a little hard on Bob! There is nothing wrong with his thought process of moving to 16" wheels and into LT tires designed for f250, f350 turbo diesels. The load & speed rating is higher and if you want reserve capacity, that is the way to go.

I guess I'm too cheap to buy the wheels.

I am not a tire engineer but, I am quite sure the sidewall on an LT is just as strong as on an ST. They both use what the industry refers to as a long or high turnup which means there is more fabric material wrapped around the bead to stitch or hold together under stress. I personally think the turnup/sidewall is designed stronger on an LT than on an ST but, that is just my opinion.

It is still a good thread. I personally think Airstream should be offering an upgrade/option package on their new trailers for 16" wheels.
__________________
wingfoot321 is offline   Reply With Quote
Old 04-09-2006, 01:27 AM   #160
Rivet Master
 
1960 24' Tradewind
santa barbara , California
Join Date: Apr 2006
Posts: 1,352
The posts that people place such as epinions usually reflect negative feedback . They did not appear to misrepresent . The problems with the 15 inch st marathons isnt any secret .The marathons are not linked to the carliles ,they are another brand of tire that seem to be problematic with trailers . The fiver manufacturers do not as you have said repect a reserve factor on the tires . Often overloading the tires . They figure ,go another 3000 pounds 2 axles with 15s will be ok .I will say that going to 16s seems to solve the problem .Only thing I would watch of course is tire pressure ., with the 16s you shouldnt have to run 80 psi . Match the load with the air pressure .16 inch tires can carry the load thats for sure.The tires can really give a rough ride at the higher pressures though.

Scott of scottanlily
__________________
scottanlily is offline   Reply With Quote
Old 04-09-2006, 10:34 AM   #161
Rivet Master
 
Bob Thompson's Avatar
 
Corpus Christi , Texas
Join Date: Sep 2003
Posts: 936
Images: 67
You gotta' love this: Read post #22.....Maybe the wheel hasn't been invent yet! http://www.airforums.com/forum...on-2641-2.html

Then read post #133 in this thread. Why reinvent the wheel!

I've already drawn my conclusions!
__________________
So Long!
Bob Thompson is offline   Reply With Quote
Old 04-09-2006, 04:48 PM   #162
1 Rivet Member
 
mmth11053's Avatar
 
1960 28' Ambassador
Lomita , California
Join Date: Dec 2005
Posts: 13
Images: 4
I'm late to the discussion. But I also have a question....Any suggestion about tires for my 1960 28' Ambassador?

Paul
__________________
mmth11053 is offline   Reply With Quote
Old 04-09-2006, 06:05 PM   #163
Rivet Master
 
1976 25' Caravanner
Vintage Kin Owner
Campton , New Hampshire
Join Date: Feb 2006
Posts: 1,113
Did some snooping at the local RV dealer . All the SOB'swere fitted wirh ST tires . Most were 2 ply sidewall with 6 or 8 ply rating . All had written on the sidewall the words " FOR TRAILER SERVICE ONLY ".

A few miles down the road was an equipment trailer dealer so I stopped to check their tires. All of of the trailers under 5000# GVWR had ST tires similar to the RV's. The trailers that had 6000# GVWR or more had 16" LT tires. I saw no wording of restriction on the LT tires . It would seem that LT tires can be used on a trailer or a passenger vehicle.

Since LT tires can be used on a vehicle with passengers and ST tires cannot , it would seem that LT tires are manufactured and tested to a higher standard . BTW , according to the federal DOT , the designation ST stands for Special Tire and not Special Trailer .

I don't think the number of actual plys in a tires sidewall has much bearing on sidewall stiffness since even 10 ply rated tires only actually have 2 plys. It doesn't seem that the plys of today hve much in common with the plys of yesteryear. I'm coming closer to the conclusion that LT tires are better and safer than ST tires for trailer use.

For those of you that feel that ST tires are better ,( and from the number of posts above there are many ), could you please post the resources that you used to come to that conclusion so we can all become better educated on this baffling subject. Thank you in advance
__________________
ticki2 is offline   Reply With Quote
Old 04-09-2006, 07:07 PM   #164
5 rivets, 1 loose screw
 
Rog0525's Avatar
 
1966 20' Globetrotter
Saginaw County , Michigan
Join Date: May 2002
Posts: 1,555
Images: 11
Quote:
Originally Posted by Bob Thompson
You gotta' love this: Read post #22.....Maybe the wheel hasn't been invent yet! http://www.airforums.com/forum...on-2641-2.html
Then read post #133 in this thread. Why reinvent the wheel!
I've already drawn my conclusions!
I've read through both posts and the link and I really don't understand how any of this supports your position. I must be missing something.

Quote:
Originally Posted by Beginner
Rog0525
Simply do as I did. Go into the shop manual and find out what size tire was originally installed on your unit. Email the manufacturer of that tire and find out what the outside diameter (OD) of that tire was and the width of that tire at its widest point on the same width rim that you now have on your unit.
Jim
Thank you for the advice but I've never had a problem in using the replacement tires recommended by Airstream customer support. I didn't ask them about horse trailers, U-Haul trailers or Bobcats. I only asked them about correct tire replacement on the particular travel trailer I owned at that time.
__________________
Rog

May you camp where wind won’t hit you, where snakes won’t bite and bears won’t git you.


Rog0525 is offline   Reply With Quote
Old 04-09-2006, 09:48 PM   #165
Frank S
 
1973 27' Overlander
peoria , Illinois
Join Date: Mar 2006
Posts: 316
Hi All--Had a few extra minutes in WalMart on Sat, and found they offer 5 tires that might apply to A/S, in their catalogs. Thought the info might be of general interest.

CARSISLE "USA Trail" ("comply with US DOT requirements")
ST225/75D15 C rated 2150#@50psi $60.97
ST225/75D15 D rated 2540#@65psi 67.22

GOODYEAR "Marathon Radial" ("Designed specifically for trailer use")
ST225/75R15 C rated 2150#@50psi 28.3"OD/8.7"wide $82.36
ST225/75R15 D rated 2540#@65psi 28.3"OD/8.7"wide 90.28

GOODYEAR 'Work Horse Rib" ("Bias Construction")
7.00-15LT D rated 2045#@65psi 29.8"OD/8.3"wide $107.20

WalMart also charges $9.76 which includes mounting, balancing, road hazard, & rotation with rebalancing. Said they would also do all tire work on the trailer if I brought it in.

I did not find any LT in the 225/75R15 size. Also the bias tire was not shown as available in C load range. My '73 Overlander has always run on 7.00-15 LT in C load range, which I believe was the originial size provided by A/S. If I change to radial, I will lose a 1/2" or more of ground clearance, and increase tire width slightly. Also will need a new spare due to change in OD (in the past used my best old tire as a spare). Haven't decided what to do for my next set of tires, but have sure read a lot of discussion in this thread.--Frank S
__________________
Frank S is offline   Reply With Quote
Old 04-09-2006, 10:00 PM   #166
Site Team
 
, Minnesota
Join Date: Aug 2003
Posts: 6,940
Images: 59
Quote:
Originally Posted by Frank S
. . . I did not find any LT in the 225/75R15 size.
I think you have discovered a funny thing about ST and LT tires sizes. If you look at them closely, the sizes alternate back and forth from LT and ST.

So you can find 205, 225 in ST, and 215, 235 in LT. Same is true in different diameters.

I have no idea why this is. It might be a conspiracy by the tire companies to keep me confused.
__________________
markdoane is offline   Reply With Quote
Old 04-09-2006, 11:03 PM   #167
uwe
418
 
uwe's Avatar
 
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,767
Images: 41
Send a message via Skype™ to uwe
It's a fact, though, that 15in tires are very hard to find, if at all, in a D or higher load rating...got to go to 16" rims and tires to get away from ST tires.
I look at my Marathons, and see a cheaply made product, with grooves and high ridges in the sidewalls, that are supposed to be "normal" for this kind of tire. This does raise questions in my mind about this entire ST tire debate.
Amazingly, I have not had any failures so far, running the Marathons on 2 different trailers.
__________________
Uwe
www.area63productions.com
uwe is offline   Reply With Quote
Old 04-09-2006, 11:46 PM   #168
Rivet Master
 
1960 24' Tradewind
santa barbara , California
Join Date: Apr 2006
Posts: 1,352
Hello everyone,

The great tire debate rages on! I personally like the orignal look of the 700-15 bias ply tire. It has the heavy shoulder and good sidewall construction.The ones I have on my 60 trdwnd are hercules tires . They are LT tires. The sidewalls have 4 plies and the tread area is 5 plies .This information is on the sidewall and they are not rated plys as in 8 ply rated as many tires are. I am happy with them ,no problems. Always check them when we stop ,temperature check etc.good looking tire for a vintage airstream. They are load range D. The 700-15 was the standard size tire for what, 25 or 30 years .on airsteams .Radials will have less rolling resistance no doubt about it. They are smoother ,sidewall flexes alot more .So do the st tires .But flexing also generates some heat ,and if they cannot handle the load ,they come apart.They did not make this special trailer tire years ago so you went with the bias 700-15 for most older airstreams even in the 70s.trailers .I have read of the st tires on the single axle rigs feelingwishy washy not as stable. Adding more air pressure makes the sidewalls stiffer ,right? Run proper pressure for the load . airstream trailers want a smooth ride as inland andy says .
__________________

__________________
scottanlily is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
1968 GT tires that will fit... RECOMMENDED ALUMINUMINUM Tires 5 10-31-2011 12:30 PM
Wide White Wall Tires wasagachris Tires 14 08-04-2011 10:32 PM
Tires and Alignment Airstream12557 Land Yacht/Legacy Motorhomes 0 06-08-2011 06:04 AM
Towmaster Tires mshamilton Tires 0 05-08-2011 10:38 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:38 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.