Reply
 
Thread Tools Display Modes
Old 12-06-2013, 10:40 PM   #1
Senior Member
 
Join Date: Jul 2008
Location: howell, mi
Posts: 120
Replacement Tires - DOWNSIZE?

Well, i'm sure the title will draw some in.. but let me give a bit of background..
Had a LONG trip planned for this past summer. The spring RV show had a unit DW & I fell in love with.. and we ordered one..
BUT.....
I'd already bought a set of NEW tires for the OLD trailer for the trip.
It had ST205/75R15 - C's on it.
I ordered ST 205/75R15 -D's for it.. (not a mile on 'em yet).

I'd figured i could put those on the NEW trailer after this trip.. and then noticed a flat on the new trailer yesterday and found a nail in one!
THAT'S when i realized the NEW trailer has ST225/75R15 -C's on it..

so.. if i DOWNSIZE to the NEW increased load range tires.. I wouldn't be running the recommended size.
Surprisingly, when reading the side-walls the weight ratings are the same (at different PSI's) 2150 on both (205/D's.. and 225/C's).

My PREFERENCE would be to just pop for another set - this time the 225/D's.. but budget doesn't allow that right now. (unless someone is looking for a set of 205/d's with NO miles on them!).

TIA for responses..
__________________

__________________
14 Flagstaff 832IKBS/Platinum
pulled by 07 GMC 2500HD/Duramax CC 4x4 with a ranch hand bumper, hadley air, piaa fogs, topper w/rack and a bed-slide!
prev: 07 Rockwood 8314SS.. most of the options..
woody9 is offline   Reply With Quote
Old 12-06-2013, 11:19 PM   #2
Moderator Emeritus
 
Dave_Monica's Avatar
 
Join Date: Sep 2007
Location: Ontario, Canada
Posts: 4,329
If the flat is repairable, I'd keep it for the spare and leave it be until the timing is right to upgrade to 225/75/R15 LRD's. Try to sell the 205/75/R14 LRD for as much as you can as they don't offer any more safety margin than the 15 LRC's.

Dave
__________________

__________________


Nights camped in 2013 - 55, 2014 - 105, 2015 - 63
Dave_Monica is offline   Reply With Quote
Old 12-07-2013, 06:04 AM   #3
Senior Member
 
Join Date: Jul 2008
Location: howell, mi
Posts: 120
They're both 15s Dave. just a 205/D - 225/C difference. and that 225 SHOUDL be repairable. Nail smack dab in the center of the tread.
But like your idea.. Anyone need a set of 205's?
__________________
14 Flagstaff 832IKBS/Platinum
pulled by 07 GMC 2500HD/Duramax CC 4x4 with a ranch hand bumper, hadley air, piaa fogs, topper w/rack and a bed-slide!
prev: 07 Rockwood 8314SS.. most of the options..
woody9 is offline   Reply With Quote
Old 12-07-2013, 07:20 AM   #4
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
Let me think about this.

Since you did not specify the manufacturer; I am using the load sheet for Maxxis.

The OEM ST 225/75R/15 Load range C tires are rated at 2150# at 50 PSI.

1) The ones you want to put on it ST 205/75R/15 Load Range D are rated at the same load capacity (2150#) at 65 PSI. So from a Load Supporting perspective there is no difference BUT you won' have the "pad" you were looking for.

2) The aspect ratio of the new tire (75R) is the same BUT with the narrower tread width the tire is shorter.

The new 205/75/15 tire is 8.07 in wide and 27.1 inches tall
The OEM 225/75/15 tire is 8.86 in wide and 28.3 inches tall

Tire Size Calculator

I think it is a safe swap since it will carry the load and physically fit the wheel well. They will rotate more per mile, and will wear out sooner, but should be safe, IMO.

Obviously if you can sell them for a good price and can bear the cost of upgrading them you should look for a 225/75/15 load range D tire to get you that cushion again.

You can repair that radial if it is a center of tread clean punch with an "off rim" repair and should give you great service for the remaining life of the set while you figure out what to do.
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 12-07-2013, 08:13 AM   #5
Senior Member
 
Join Date: Jul 2008
Location: howell, mi
Posts: 120
Thanks Herc! Those numbers track with what I've found on them both on-line and on the sides of the tires themselves. I think mathematically it works.. but the height will also 'lower' the trailer just a tad.
and yes. loosing that 'extra cushion' IS a concern! that's why i originally wanted to go up a load rating.
Think I need to talk with them @ the local dealer for where I got (Discount Tire - ONLINE).. and see what they might be willing to do as well. AND have them do the 'in the tire' fix.
Thanks!
__________________
14 Flagstaff 832IKBS/Platinum
pulled by 07 GMC 2500HD/Duramax CC 4x4 with a ranch hand bumper, hadley air, piaa fogs, topper w/rack and a bed-slide!
prev: 07 Rockwood 8314SS.. most of the options..
woody9 is offline   Reply With Quote
Reply

Tags
replacement, tire, tires

Thread Tools
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




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:13 AM.