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

Go Back   Sunline Coach Owner's Club > Sunline Club Community Forums > Introduce Yourself
Click Here to Login

Join Sunline Club Forums Today


Reply
 
Thread Tools Search this Thread Display Modes
Old 06-17-2020, 05:13 PM   #1
Junior Member
 
Join Date: Jun 2020
Location: Pennsylvania
Posts: 2
SUN #12000
shawn123 is an unknown quantity at this point
Hi new to camping. One simple question

I have a sunline t2150 currently has p185/75/14 tires but I'm looking to put standard st205/75/14 trailer tires on it. Has anyone done this before? Sidewall height is only about a .53 inch difference and about an inch wider. Any help is appreciated!
__________________

__________________
shawn123 is offline   Reply With Quote
Old 06-18-2020, 09:35 AM   #2
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
JohnB is on a distinguished road
Welcome!

Congrats on your new sunny!

On your tires, there are a few things to check and see if they will fit.

1. Bump clearance from the tire touching the bottom side of the wheel well. Measure the gap from the top of the tire to the bottom of the fender well on the tires you have now. What is that distance?

Dexter axle recommends 3” is the minimum bump clearance but Sunline set up some of the campers with less than that. My camper only had 2 1/2” clearance when I got it. That does work but that is about the limit. 2 1/4” sooner or later can hit depending on how bad the bump was you ran over. Since your new tires are larger in OD that will eat into the available clearance.

2. The extra width, look inside now at your old tires on the distance between the tire sidewall at the widest point and the frame. As the trailer turns the axle flexes and the distance gets smaller but to small to not have the tire rub the frame. What is distance you have now? Since your new tires are wider, it will reduce this distance. You may be able to accommodate the width, but you neeD to make sure you have enough clearance at this area.

3. The wheels themselves, check that the new tire will mount in the rim width you have if you are not buying new rims. The tire manufacturer sets limits on rim width that their tire will be acceptable to mount that tire on. I would not recommend you exceed that limit as a wider tire on a too narrow rim that is not allowed can have sidewall flex issues.

4. If you get new rims/wheels, make sure they have zero offset as trailer wheels do not have an offset and the bearings and axle is made to handle only zero offset. (Offset is the distance the wheel lugs are from center of the rim)

5. The new tire can handle more load. Check that your wheel can handle the load of the new tire. Or get new rims/wheels to match.

If you can accommodate those areas, changing size should work.

I noticed you said ST tires, yes that is right for your camper and not the P tires it had oil it.

Hope this helps and let us know how you make out.

John
__________________

__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is online now   Reply With Quote
Old 06-18-2020, 09:39 AM   #3
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
JohnB is on a distinguished road
What year is your a camper? We can look up the size tire Sunline intended for it. It maybe that Sunline had the larger tire and the prior owner downsized.
__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is online now   Reply With Quote
Old 06-18-2020, 09:44 AM   #4
Junior Member
 
Join Date: Jun 2020
Location: Pennsylvania
Posts: 2
SUN #12000
shawn123 is an unknown quantity at this point
Thank you its an 87 t2150.
__________________
shawn123 is offline   Reply With Quote
Old 06-18-2020, 11:58 AM   #5
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
JohnB is on a distinguished road
Quote:
Originally Posted by shawn123 View Post
Thank you its an 87 t2150.
From the 1987 Sunline Brochure, https://www.sunlineclub.com/forums/d...o=file&id=5491

Sunline installed C78-14 load range B tires. The GVWR of the camper is 4,480 lb.

By these 2 charts, the old C78-14 aligns the closest to a P185/75-14 but they may not be an exact size match . Just in the case of trailer tires, we do not want the "P" and want to go ST on your tandem axle camper.

Vintage Tire Size Conversion Chart - Vintage Car Connection

https://tengtoolsusa.com/blogs/news/...nversion-chart

For the weight of your camper, you want the modern load range C. The ST205/75R14 Load range C which is what you came up with seems to be what will match up the closest from what I can see. This is the Carlisle brand chart on their sizes, their Radial Trail HD trailer tire. Some brands may have slightly different dimensions. https://www.carlislebrandtires.com/o...dial-trail-hd/

You are going to have to check the 5 things I listed above to make sure the ST205/75R14 you pick and the old wheel if you are reusing it, fit the needs. The Carlisle tire needs a 5.5" wide rim to mount the tire.

Let us know how you make out.

John
__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is online now   Reply With Quote
Old 06-30-2020, 02:54 PM   #6
Junior Member
 
Join Date: Aug 2010
Posts: 22
SUN #1342
cnash1970 is an unknown quantity at this point
They will fit. I did the same with my 1988 T2151 a couple of years ago. Mine also had old "P" car tires on it. Those trailer tires will handle much better and I used the same size you mentioned.

Chris
__________________

__________________
Chris & Kelly Nash
Rochester, NY
1987 Sunline T2251
TV: 2008 Chrysler Aspen
cnash1970 is offline   Reply With Quote
Reply

Tags
sunline, t2150, tires


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
Super Simple, No-Mess Chicken Pot Pie OTW Recipes 0 02-10-2017 03:37 AM
Could One ofCould One of Our Moderators Please Remove This Thread.. Wannabes Forum Admin & Site Help 2 10-16-2016 08:49 PM
A few simple questions from a new owner Aardvarkjff Sunline Community 4 04-03-2015 08:47 PM
handy and simple modification pwb01 Modifications 5 07-13-2014 06:58 PM
Keeping it simple...Sunline T1661 wiring to vehicle. Musikaldave Modifications 0 06-21-2012 04:39 PM


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Sunline RV or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 08:39 AM.


×