Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-08-2013, 03:31 PM   #1
New Member
 
2003 25' Safari
:iyy;e Torch Key , Florida
Join Date: Dec 2011
Posts: 2
tire replacment

I plan to replace tires with Load Rating "D" which is 2540 ibs with 65 psi. My 25' Safari has a GVWR of 6300 lbs. The Load Rating "C" which is 2150 lbs at 50 psi or 8600 lbs total should handle my trailer. Tires are ST225x75x15. I prefer the 50 psi. I have read most of the posts on tires but not much on changing load rating. Thanks for your help.
__________________

__________________
Capt Jeff is offline   Reply With Quote
Old 05-08-2013, 04:09 PM   #2
Rivet Master
 
SteveH's Avatar
 
2005 39' Land Yacht 390 XL 396
Common Sense , Texas
Join Date: Sep 2007
Posts: 5,311
Going from a "C" at 50 psi and 2150 lb rating to a "D" at the same 50 psi will gain you noting in load capacity, and you can check that on the charts if you want.

You will only gain load capacity with the D's when you go to higher air pressure.
__________________

__________________
Regards,
Steve
SteveH is offline   Reply With Quote
Old 05-08-2013, 04:15 PM   #3
RLS
Rivet Master
 
RLS's Avatar

 
2004 25' Classic
Prescott , Arizona
Join Date: Jul 2008
Posts: 608
Quote:
Originally Posted by SteveH View Post
Going from a "C" at 50 psi and 2150 lb rating to a "D" at the same 50 psi will gain you noting in load capacity, and you can check that on the charts if you want.

You will only gain load capacity with the D's when you go to higher air pressure.
I think (bad idea! ) he wants to do the opposite, go from the 65psi "D" to the "C" 50 psi. JMHO
__________________
Julia & Bob
W/ Deedee & Boo
AIR #30685
RLS is offline   Reply With Quote
Old 05-09-2013, 07:06 AM   #4
CapriRacer
 
CapriRacer's Avatar
 
I'm in the , US
Join Date: Sep 2012
Posts: 624
Quote:
Originally Posted by Capt Jeff View Post
I plan to replace tires with Load Rating "D" which is 2540 ibs with 65 psi. My 25' Safari has a GVWR of 6300 lbs. The Load Rating "C" which is 2150 lbs at 50 psi or 8600 lbs total should handle my trailer. Tires are ST225x75x15. I prefer the 50 psi. I have read most of the posts on tires but not much on changing load rating. Thanks for your help.
This sounds like a terribly idea.

One of the principals in engineering is to "under-utilize" - that is, specify a larger component than is needed in order to reduce the risk of failure. Of course, the larger the component, the less risk.

We all know about the issues with ST tires and going larger seems to be one of the fixes to the issue. You're trying to go the opposite direction - and we know that is the wrong way.
__________________
CapriRacer is offline   Reply With Quote
Old 05-09-2013, 09:19 PM   #5
3 Rivet Member
 
BlackAces's Avatar
 
Taylors , South Carolina
Join Date: Nov 2012
Posts: 119
Quote:
Originally Posted by Capt Jeff View Post
I plan to replace tires with Load Rating "D" which is 2540 ibs with 65 psi. My 25' Safari has a GVWR of 6300 lbs. The Load Rating "C" which is 2150 lbs at 50 psi or 8600 lbs total should handle my trailer. Tires are ST225x75x15. I prefer the 50 psi. I have read most of the posts on tires but not much on changing load rating. Thanks for your help.
Are you replacing Original Equipment tires as depicted on the trailer's certification label? If so the reference is applicable.

I can post numerous references on this load capacity subject. The one referenced below gets right to the point.

http://us.coopertire.com/Tire-Safety/Replacement-Tire-Guide/Load-Capacity.aspx

That information is from a combination of government regulations and tire industry standards.

__________________
BlackAces
USN - RET - PDRL
DoD & SSA - RET
BlackAces is offline   Reply With Quote
Old 05-09-2013, 11:26 PM   #6
4 Rivet Member
 
Hodum's Avatar
 
1995 34' Excella
Corinth , Mississippi
Join Date: Dec 2010
Posts: 304
I bought a tri-axle 34 ft Airstream that had just been re-shod with 10 ply rating 80 psi tires. It took me a little while to realize that the tires were my main problem. I lowered the air pressure to 60 and the tire shoulders began to wear excessively. I changed to Michelin 235/75x15. The load rating is right. The recommended air pressure is 50psi, which is what my trailer specs call for. The ride of the trailer is 100% better with these softer, less inflated tires There is no way that I would change back.
__________________

__________________
Why settle for anything less?
1995 34ft Classic Excella 1000
2012 Kings Ranch F-250 FX-4, 6.7 diesel, 6 speed auto trans.
TAC # MS-8
Hodum 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



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:27 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.