Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > TIRES, Montana Tires
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 02-26-2018, 07:53 AM   #1
jking
Montana Fan
 
Join Date: Aug 2017
Location: Twin Falls, ID
Posts: 198
M.O.C. #20361
17.5 wheels/tires

I see some have switched out to 17.5 Sailuns. I understand they are rated at 4800 lbs. Any other compelling reasons to do so? The weak link would still be the OEM suspension anyway, right?
__________________
Jim and Barb
Chica and Baby (the fury kids)
2014 3402rl
2017 Ram 3500 6.7 ctd. 4x4 srw
jking is offline   Reply With Quote
Old 02-26-2018, 09:09 AM   #2
jcurtis934
Montana Master
 
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 2,986
M.O.C. #13740
These are load range h wheels and tires that are very rugged in design and are regrooveable. The main thought is to put a tire in contact with the road surface that can handle serious abuse served to us by the great roads we drive on now days.
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
jcurtis934 is offline   Reply With Quote
Old 02-26-2018, 09:23 AM   #3
WeBeFulltime
Montana Master
 
WeBeFulltime's Avatar
 
Join Date: May 2011
Location: Hixson
Posts: 3,223
M.O.C. #11397
That would put you at 9,600 lbs tires on a 7,000 lb axle. I don't see that as necessary. Whatever floats your boat though.
__________________
2018.5 Montana 3791RD


Full Timers 9/1/2010 through 1/16/2020.
WeBeFulltime is offline   Reply With Quote
Old 02-26-2018, 04:25 PM   #4
lostshakerofsalt
Montana Fan
 
Join Date: Jan 2010
Location: Fulltiming
Posts: 313
M.O.C. #10012
I have an SOB that came with 17.5 inch Goodyear G114 H rated tires. My 5th wheel weighs out at >19,000 lbs and with >32,000 miles on the tires there is still plenty of tread. So from my point of view, if I get 60,000 miles out of the tires it will more than pay for the price differential. Plus the piece of mind that there has to be something really bad on the road to damage the tires. The only real drawback I can see is the weight of the wheels. As I recall the mounted G614s weighed around 80-85 lbs each and the 17.5 G114s weigh closer to 95 lbs (or so I have been told, I have yet to have to change one).
__________________
Steve and Diane Pena
SOB Owner
2014 F-350 Dually Diesel
Home is where we park it
lostshakerofsalt is offline   Reply With Quote
Old 02-26-2018, 06:57 PM   #5
twindman
Montana Master
 
twindman's Avatar
 
Join Date: Apr 2006
Location: Mesa
Posts: 1,816
M.O.C. #5651
Do the 17.5 tires fit inside the wheel wells? I didn't think there was too much extra room in the Montanas.
Thanks.
__________________

Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
twindman is offline   Reply With Quote
Old 02-26-2018, 07:23 PM   #6
jking
Montana Fan
 
Join Date: Aug 2017
Location: Twin Falls, ID
Posts: 198
M.O.C. #20361
I haven’t been under the rig yet to look, but would’t I rig with a 16000 gvwr need double 8 k axles vs 7K ?
__________________
Jim and Barb
Chica and Baby (the fury kids)
2014 3402rl
2017 Ram 3500 6.7 ctd. 4x4 srw
jking is offline   Reply With Quote
Old 02-26-2018, 08:53 PM   #7
Dam Worker
Montana Master
 
Join Date: Mar 2015
Location: West Richland
Posts: 1,179
M.O.C. #17164
As far as I know Jim the correct answer to your question would be no. Remember that approxamently 20% of Fifthwheel is king pin hitch weight. So in theory if I got my math correct you can subtract 3200 lbs off of your axles. If we do upgrade our next unit will have the 8k axles but way around 19k instead of 16k.
Happy roads to you.

Tom Marty
__________________
Dam Worker is offline   Reply With Quote
Old 02-27-2018, 12:39 AM   #8
Texan
Montana Master
 
Join Date: May 2017
Location: new caney
Posts: 1,050
M.O.C. #19873
Quote:
Originally Posted by jking View Post
I see some have switched out to 17.5 Sailuns. I understand they are rated at 4800 lbs. Any other compelling reasons to do so? The weak link would still be the OEM suspension anyway, right?
The new sailuns are rated at 4400 pounds. The tires would probably not be as much of an issue as the wheels. Just because someone increases there tires or suspension does not increase your gvwr. If you were 16,000 gvwr before the mods then you are still 16,000 gvwr after the mods. You do have a larger safety factor with the increase in suspension and tires but to be able to carry much more than the factory gvwr then you would need to increase the size of your frame. Moble Suites has 15'' frame compared to our 12'' frame and the 8,000 pound I.S. along with the 17.5'' wheels and tires. If you have g rated tires then you are just as safe as an Mobile Suite with there increased frame and suspension.
Texan is offline   Reply With Quote
Reply

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
Forum Jump

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

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


All times are GMT -6. The time now is 01:06 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×