Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-22-2006, 09:25 AM   #1
1 Rivet Member
 
1974 31' Sovereign
Flower Mound , Texas
Join Date: Apr 2006
Posts: 6
Best tires for a 1974 31' er?

I am going to need to replace the tires on my A/S. Can someone tell me which manufacturer makes good tires for it , and where to get them? Right now it has the Michelin 700x15 radial tires like the ones that were on it when it was brand new. I'm not sure but I don't think they make these any more.
Also size, I see the new ones have 235/75x15 Goodyear Marathons.

Any help would be greatly appreciated.

CB
__________________

__________________
booman80 is offline   Reply With Quote
Old 04-22-2006, 01:12 PM   #2
Rivet Master
 
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,941
Original tires from factory in 1973 were not radials. The 7.00x15 you have on now are bias ply tires. They are stiffer than the radials of equal rating, so you might get a little better ride out of the 2.35/75x 15 you mention above. if you keep the pressure on the low side you will also end up with more sway. keep the pressure up to give you better side wall stiffness and lateral stability. Make sure you are using the proper load range rated tire with the proper amount of plys in the side wall. You should also make sure they are trailer tires rather than car tires to get better life and tracking out of them.
__________________

__________________
dwightdi is offline   Reply With Quote
Old 04-22-2006, 01:25 PM   #3
1 Rivet Member
 
1974 31' Sovereign
Flower Mound , Texas
Join Date: Apr 2006
Posts: 6
Thanks dwhitedi-

Any suggestions on makes of tires, load range , and plys?

CB
__________________
booman80 is offline   Reply With Quote
Old 04-22-2006, 02:56 PM   #4
Frank S
 
1973 27' Overlander
peoria , Illinois
Join Date: Mar 2006
Posts: 316
Hi booman80--More info than you want is posted on thread "Tires-Tires-Tires".--Frank S
__________________
Frank S is offline   Reply With Quote
Old 04-22-2006, 05:38 PM   #5
Rivet Master
 
1976 25' Caravanner
Vintage Kin Owner
Campton , New Hampshire
Join Date: Feb 2006
Posts: 1,113
FWIW , my '76 owners manual listed a 700x15 XC radial tire as an option on all dual axle models , 23' to 31' . The standard tire for the above was 700x15 6 ply , the 700x15 8 ply for single axle models , was NR for dual axle models.

NR -- not recommended by tire manufacturer

This should shed a little more darkness on the topic
__________________
ticki2 is offline   Reply With Quote
Old 04-22-2006, 06:42 PM   #6
Moderator Emeritus
 
Pick's Avatar
 
1972 31' Sovereign
High Springs , Florida
Join Date: May 2002
Posts: 2,310
Images: 36
Send a message via AIM to Pick
I replaced my tires a couple of years ago with 7.00 X 15 bias ply, Load range D. May go with Goodyear Marathons next go round. I have a new set of Marathons on a 10,000 gvw flatbed equipment trailer and they do run cooler than the bias ply, even with 9000 on the tandems.
__________________
ARS WA8ZYT
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
Pick is offline   Reply With Quote
Old 04-22-2006, 09:40 PM   #7
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,191
Quote:
Originally Posted by ticki2
FWIW , my '76 owners manual listed a 700x15 XC radial tire as an option on all dual axle models , 23' to 31' . The standard tire for the above was 700x15 6 ply , the 700x15 8 ply for single axle models , was NR for dual axle models.

NR -- not recommended by tire manufacturer

This should shed a little more darkness on the topic
The single axle trailers had two load range D tires, because there were half as many tores to carry the load. A double axle trailer had less weight per tire, so the load range C tires could be used for a softer ride without oevrloading the tires.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 04-23-2006, 07:05 AM   #8
Rivet Master
 
1976 25' Caravanner
Vintage Kin Owner
Campton , New Hampshire
Join Date: Feb 2006
Posts: 1,113
Quote:
Originally Posted by overlander63
The single axle trailers had two load range D tires, because there were half as many tores to carry the load. A double axle trailer had less weight per tire, so the load range C tires could be used for a softer ride without oevrloading the tires.
I understand the reasoning for this , and agree . What I was trying to point out is that not only can C rated tires be used on dual axle units of this era but it is NOT recommended to use D rated tires. It seems that it may be just as bad to over tire as it is to under tire , and the same for inflation. The systems need to be matched ,( tires , wheels , inflation , and axles ) to the actual weight they will carry. Sometimes more is not better
__________________
ticki2 is offline   Reply With Quote
Old 04-23-2006, 07:11 AM   #9
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,191
Quote:
Originally Posted by ticki2
The systems need to be matched ,( tires , wheels , inflation , and axles ) to the actual weight they will carry. Sometimes more is not better
I agree. I have seen wheels come apart when they have tires installed that are too much for them. Most automotive wheels are rated for either 35 PSI or 41PSI. If we put on a tire that can have 50 (C range) or 65 (D range) this can cause the rim part of the wheel to fail. There is a thread kicking around here somewhere that addresses that issue at length. The gist of the thread is, if you are going to use load range D tires on load range C wheels, make sure you only inflate to the load range C pressure to avoid this from happening.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 04-23-2006, 08:56 AM   #10
Moderator Emeritus
 
Pick's Avatar
 
1972 31' Sovereign
High Springs , Florida
Join Date: May 2002
Posts: 2,310
Images: 36
Send a message via AIM to Pick
I run my D rated bias ply at 50 PSI, and have never had a problem. They are going on 3 years old. My C rated spare has 45 PSI max rating, and I keep that much in it.

4- "C" rated tires at 1720 load rating, is 6880, to close for my comfort level.
4- "D" rated tires at 2080 load rating, is 8320, much better feeling, especially at highway speeds.
__________________
ARS WA8ZYT
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
Pick is offline   Reply With Quote
Old 04-24-2006, 08:43 AM   #11
Rivet Master
 
1984 31' Excella
Norfolk , Virginia
Join Date: Jan 2005
Posts: 667
Images: 11
Best tires for a 1974 31'er

booman80
Be very careful.
The wheel wells in our trailers are quite narrow.
May I suggest that you email Airstream directly and ask them what tire they recommend for your unit. This information is useful in your decision later on what tire to go to.

The Michelin XCA 700:15 was the original tire on my 1984 Excella 31 ft according to the owners manual and the shop manual.

Due to the problems I encountered with Special Trailer tires (Nankang Marathon, ETC.) and the problems encountered by others who frequent this Forum, I decided to go with another size rim. What I ended up with was the BF Goodrich Commercial T/A LT225/75R16 for three reasons.

1. Except for the Cooper Custom Trailer Plus, none of the Special Trailer tires are speedrated for over 65 MPH or 100 Degree F. concrete. So if you ever go over 65 or run on concrete over 100 Degrees F you have over stressed the tire. The Cooper Custom Trailer Plus (ST225/75T15) carries a speedrating (appearntly the overall acid test of tire durability) of 112 MPH, because of Coopers marketing restrictions, I could not purchase their tire in my area.

2. It seems to me to be an industry attitude that all manufacturers are moving away from heavy duty/high load 15 inch tires. Sixteen inch tires are plentiful.

3. Michelin owns B. F. Goodrich. The Goodrich Commercial T/A is the same Outside Diameter (OD) as the original Michelin XCA, and the same width as the Goodyear Marathon ST225/75R15. I have been in email contact with Airstream owners in France and was told that the only tires that they were NOT having trouble with were made by Michelin, Goodrich and Pirelli.

I am not the only one to go to the LT225/75R16 LRD Commercial T/A, Bob Thompson already his milage on his and no problems.

The decision is yours. You can refer to:

http://www.airforums.com/forum...res-16506.html

for a more in depth discussion.
Beginner
__________________
Beginner is offline   Reply With Quote
Old 05-29-2006, 08:22 PM   #12
1 Rivet Member
 
1974 31' Sovereign
Flower Mound , Texas
Join Date: Apr 2006
Posts: 6
Hey Guys, thanks for all the tire info!

I'll probably try the Coopers if I can get them, I really don't want to change the original aluminum wheels that came on it when it was new.

Happy Airstreamin!



Booman
__________________

__________________
booman80 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
LT versus ST tires on a trailer 76Argosy Tires 18 08-29-2014 05:03 PM
need advice re. 1969 tires, brakes, etc. Dave Cole Tires 6 01-29-2007 07:04 AM
Whitewall Tires 66whitebread Tires 0 09-17-2002 07:29 PM
tires and UV ALANSD Airstream Motorhome Forums 0 05-04-2002 04:31 PM
Best wheels & Tires... Andy R Wheels, Hubs & Bearings 4 04-15-2002 11:41 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:46 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.