Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Country Coach Owners Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 08-05-2015, 02:25 PM   #1
Junior Member
Join Date: Jul 2012
Posts: 10
12R22.5 tires to 315/80/22.5 tire

I would like to change from 12 R 22.5 tires to a 315 / 80 22.5 tire. Do I need to change rims from 8.25 to 9.0? Some dealers are telling me I can use these rims, others are telling me no, I have to go to a 9.0 rim. This is on our 2005 Allure. Anyone run into this issue or have some advice?

dblair2116 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-05-2015, 09:38 PM   #2
Senior Member
IASM's Avatar
Join Date: Nov 2013
Posts: 484
I think the preferred width is 9 but the Michelin site list a 8.25 to 9 as acceptable. My question would be why. The 315 is a very robust tire with a capacity of 9090 at 130 but it is also a lot harder to find then a 12:00. Does your front axle weight suggest a more robust tire? I am going from a 315 to a 365 but it is for capacity only and comes with limited availability since Michelin is currently the only maker of the tire.

IASM is offline   Reply With Quote
Old 08-05-2015, 09:45 PM   #3
Senior Member
Mr_D's Avatar
Winnebago Owners Club
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 31,317
Most tires have a preferred wheel width and an secondary one. With the secondary one they might even derate the tire due to the narrower or wider width. The tire charts will have that info but you have to dig to find it.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
Mr_D is online now   Reply With Quote
Old 08-05-2015, 10:43 PM   #4
Senior Member
stuhly's Avatar
Fleetwood Owners Club
Join Date: Jan 2010
Posts: 1,336
I used to run 315 tires on trucks and we got better mileage out of the tires with 9 inch rims over the 8.25.
stuhly is offline   Reply With Quote
Old 08-06-2015, 07:47 AM   #5
Senior Member
Smitty77's Avatar
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 3,500
Your profile shows an Allure 40' 470. You might check the tables for your weight, and find that you can safely downsize from 12R's, instead of upsizing. Or perhaps at least for the front axle. (Our 40' 04 Allure, High Cascade with two Drivers Slides, would allow us to safely downsize to the next size tire down for the front axle. The rear weight, drive/tag, were too close to the top range of the next size tire down to feel comfortable doing so. And I have not done so, as we hope to get another two years out of our 12R's XZE* set of shoes!

I also believe I remember reading that another CC owner with with he Continental RV tires, and that they were a bit narrower the the Michelins, for the same size diameter tire. (Memory may be off on this, think it was George B. on the Yahoo CC User Group. You might search via Goole via 12R or 315's and Country Coach - and find more info that way. It's been a topic for well over 10 years, on the options available.)

Michelin TCI centers, and Les Schwab are two tire dealers that keep coming up as being top notch to work with. I've also had good luck with Park House out of Southern California.

Best to luck to you,
Roo II is our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
Smitty77 is offline   Reply With Quote


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
Trailer tire pressure vs. Heat Frdrcng97 Trailer Towing and Tow Vehicles Discussion 28 07-06-2015 05:54 PM
Tire Inflation on "Hot Road" Tireman9 iRV2.com General Discussion 2 10-13-2014 10:30 AM
What are normal tire temperatures?? Gary.Jones Monaco Owner's Forum 38 06-11-2014 09:10 AM
Tires and tire pressure Daniel3d iRV2.com General Discussion 16 05-14-2014 06:30 AM
NEW RECALL Michelin LT tires Francesca iRV2.com General Discussion 1 07-12-2013 02:51 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:54 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.