Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-28-2015, 09:19 AM   #181
Rivet Master
Commercial Member
 
Ravenna , Ohio
Join Date: Apr 2012
Posts: 1,344
Quote:
Originally Posted by CapriRacer View Post
Just a couple of thoughts:

1) It would be highly unusual if all 4 tires on a travel trailer carried the same load. There is front to rear and side to side variation. The conservative guy in me says the worst case is 115% of the average.
Reasonable IMO

2) ST tires are speed restricted to 65 mph. In order to operate at 85 mph (the value I think should be used by trailer manufacturers), the load table values would need to be reduced by 20%.
I would limit to 75 mph as I have seen no data to support operation in tt usage at any speed higher than 75, but would no oppose a reduction in static loading margin to 15% to 20% below maximum

3) My experience says that tires should not be operated at more than 85% of their rated load (which includes those 2 things above).
YUP

So I think the calculation is much more complex.
In addition to the above I would change the DOT requirements for ST tires to be the same test procedures as 571.139 which was developed in 2001-2003 rather than continue to use section 571.109 which is over 60 years old and does not reflect today's highway speed or available tire technology.
Tireman9 is offline   Reply With Quote
Old 12-29-2015, 07:49 AM   #182
Rivet Master
 
switz's Avatar

 
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction , Arizona
Join Date: Sep 2012
Posts: 6,215
Images: 9
Per my scales weighing the individual Classic tires:

_______Street____Curb
Front.....2034........2042

Rear......1921........2062

Weight drop on street side rear is after replacing the stock six gallon water heater with a lighter weight instant on Truma AquaGo comfort unit and no stored water.

We installed the 16" Michelins and 16" SenDel wheels as soon as the trailer came off the dealer lot. The 2,680 load pound rating of the Michelin tire provides a greater safety margin than the GYM ST tire with a 2,540 rating with the more important information of a better service history with the Michelin tires.

The Eddie Bauer trailers had the Michelin/SenDel option for several years before the more wide spread after market adoption of this combination on other models. Now the factory installs this combination as standard on the 2015 and later Classics that have a 10,000 pound GVW with a pair of 5,000 pound rated axles.

As I said more than two years ago in late 2013, installation of the same Michelin LT225/75R16/E LTX M/S2 ( P/N 05681) tires and SenDel T03-66655T wheels that the factory has on display for sale at the service center at Jackson Center provided implicit approval of this combination in terms of any potential warranty issues in the suspension system.
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC

TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell

2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
switz is offline   Reply With Quote
Old 12-29-2015, 01:19 PM   #183
Rivet Master
Commercial Member
 
Andrew T's Avatar

 
2019 27' Tommy Bahama
London , Ontario
Join Date: Aug 2007
Posts: 1,343
Way back in the late 80's Airstream built the first fifth wheels ,the Argosy and later the Airstream version. They had the first Bias Ply ST tires on them rated at 2540 pounds. They were loaded to max and were blowing every few hundred miles. At the time there wasn't a 16" tire that would fit and we could not get a 16.5" rim with the right offset and bolt pattern.

We had to try something so we put on the 7.00 x 15" LT radials we used on Airstream trailers in those days. They were only rated at 2040 pounds so they were quite overloaded yet we never saw any failures, it was only 3 units but still they ran a lot of miles.

Andrew T
__________________
Andrew Thomson
London, Ontario

"One test is worth a thousand expert opinions."
Tex Johnston, Boeing 707 test pilot
Andrew T is offline   Reply With Quote
Old 12-30-2015, 08:19 AM   #184
Rivet Master
 
tjdonahoe's Avatar
 
2013 31' Classic
billings , Montana
Join Date: Feb 2010
Posts: 3,576
My 1973 23' avion came with G-78/15 jumbo, after they give out 13 years later we used 225/75/15 P and never had any tire problems,the trailer was around 6600 lbs loaded I believe.
tjdonahoe is offline   Reply With Quote
Old 12-30-2015, 09:28 AM   #185
Rivet Master
 
Currently Looking...
Mantua , Ohio
Join Date: Jul 2005
Posts: 7,062
Blog Entries: 2
Funny, my 84 30 foot Avion came from the factory with H78/15 or 700/15LT tires on it. Was this before ST tires?gvw is 8500 pounds, dual axle.
xrvr is offline   Reply With Quote
Old 12-30-2015, 10:35 AM   #186
1987 Avion 34W owner
 
PaulnGina's Avatar
 
Vintage Kin Owner
Good Ol' , USA
Join Date: Mar 2014
Posts: 2,090
Quote:
Originally Posted by avionstream View Post
Funny, my 84 30 foot Avion came from the factory with H78/15 or 700/15LT tires on it. Was this before ST tires?gvw is 8500 pounds, dual axle.
Here is the ID plate from our 1987 Avion 34W. Specified ST tires back then.
Attached Thumbnails
Click image for larger version

Name:	image14.jpeg
Views:	112
Size:	136.0 KB
ID:	254833  
__________________
I this great country!!!!
1987 Avion 34W
1995 Ford F250 7.3L PowerStroke
PaulnGina is offline   Reply With Quote
Old 12-30-2015, 11:01 AM   #187
Rivet Master
 
crispyboy's Avatar
 
1994 30' Excella
alexandria , Kentucky
Join Date: Aug 2004
Posts: 2,314
Images: 3
Quote:
Originally Posted by PaulnGina View Post
Here is the ID plate from our 1987 Avion 34W. Specified ST tires back then.
Wow "H78 x 15 ST C" , 9500 GVWR - thats like an elephant riding on lawn mower tires
__________________
Steve, Christy, Anna and Phoebe (Border Collie)
1994 Classic 30'11" Excella - rear twin
2009 Dodge 2500, 6 Speed Auto, CTD, Quad Cab, Short Bed
Hensley Arrow hitch with adjustable stinger
WBCCI # 3072
crispyboy is offline   Reply With Quote
Old 12-30-2015, 12:17 PM   #188
Rivet Master
 
SteveSueMac's Avatar

 
2012 27' Flying Cloud
W , New England
Join Date: Oct 2012
Posts: 7,402
Quote:
Originally Posted by crispyboy View Post
Wow "H78 x 15 ST C" , 9500 GVWR - thats like an elephant riding on lawn mower tires

Unless the 34 has triple axles. 6 of those tires would be over 12,000# carrying capacity.

Is it a double or triple?
SteveSueMac is offline   Reply With Quote
Old 12-30-2015, 12:26 PM   #189
Rivet Master
 
Currently Looking...
Mantua , Ohio
Join Date: Jul 2005
Posts: 7,062
Blog Entries: 2
Triple axles.
xrvr is offline   Reply With Quote
Old 12-30-2015, 12:29 PM   #190
Rivet Master
 
SteveSueMac's Avatar

 
2012 27' Flying Cloud
W , New England
Join Date: Oct 2012
Posts: 7,402
Quote:
Originally Posted by avionstream View Post
Triple axles.

Well there you go! No problem! 😃
SteveSueMac is offline   Reply With Quote
Old 12-31-2015, 11:03 PM   #191
1 Rivet Member
 
2016 27' Eddie Bauer
Plantersville , Texas
Join Date: May 2010
Posts: 11
looks completely normal, a Goodyear Marathon tire made in China. I have had this exact problem before. If you switch to a better brand this will go away. Nothing new here.
bladesmith2 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
Bad Marathon, Bad Marathon ROBERTSUNRUS Tires 45 11-01-2015 03:46 PM
weird electrical problems Chuck Electrical - Systems, Generators, Batteries & Solar 11 10-04-2005 02:18 PM
Weird aluminum on endcaps? silvrtwinkie Ribs, Skins & Rivets 4 05-16-2005 12:41 AM
Weird off topic request Jim & Susan Off Topic Forum 15 05-12-2005 01:00 PM
Forum Acting Weird Tonight Big Dee Forum Admin, News and Member Account Info 1 05-12-2004 07:44 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 11:22 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.