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04-13-2013, 08:15 PM
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#1
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Senior Member
Workhorse Chassis Owner
Join Date: Jul 2005
Location: Modesto, CA
Posts: 413
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22.5 vs 19.5 Tires
What are the advantages of a motorhome with the bigger tires. Do you get a better ride etc?? I know some manufactures went to a bigger tire and was wondering why?
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2004 Fleetwood Revolution 38B
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04-13-2013, 08:23 PM
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#2
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Senior Member
Join Date: Dec 2010
Location: Tuckerton, NJ
Posts: 164
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I would think the main difference is load capacity.
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2005 Itasca Horizon 40FD
FMCA 428291
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04-13-2013, 08:24 PM
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#3
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Senior Member
Join Date: Jun 2011
Posts: 287
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I have a 38' gasser with 19.5s don't know if it rides any different than 22.5. But I do know its time to replace tires and I am glad I have the 19.5s they seam to be cheaper. You should change to new tires after 5 to 7 years even if there not worn out a couple bucks here and a couple there all adds up
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Mody n Domy
full timing it
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04-13-2013, 08:25 PM
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#4
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Senior Member
Tiffin Owners Club Workhorse Chassis Owner
Join Date: Oct 2009
Location: Warner Robins, GA
Posts: 2,613
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I want to hear the results of this one too.
My thoughts are that with the larger tire you would increase your weight capacity and get a smoother ride.
Jon
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Jon & Sue Francis (Retired U.S.A.F.)
Lil Girl-Rescued, Abby Rescued, Peaches Rescued
06 Allegro 35TSA Workhorse Chassis
2013 Chevy Spark Dinghy
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04-13-2013, 08:32 PM
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#5
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Senior Member
Winnebago Owners Club Fleetwood Owners Club Holiday Rambler Owners Club
Join Date: Dec 2011
Location: North East Florida
Posts: 2,026
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Same concept as automobiles. A little better ride but mostly for weight of the Vehicle. A bigger tire carries more weight.
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2019 Horizon 42Q
Cummins L-9 450 HP
Maxum Chassis / IFS with Tag
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04-13-2013, 08:54 PM
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#6
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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My coach was available with two chassis options: Ford with 19.5, and Workhorse with 22.5. From researching and driving both:
Larger tire: - Greater weight carry capacity
- Maybe smoother ride (other variables apply of course)
- Larger tire chassis had another step at the entry
- More difficult to find space carry a spare
And of course cost more when it comes time to replace.
YMMV
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Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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04-13-2013, 09:07 PM
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#7
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Senior Member
Join Date: Sep 2012
Location: Palm Coast Florida
Posts: 12,995
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19.5 tires/wheels look to small and 22.5 tires/wheels look better.
You always get a smoother ride with larger tires plus more load capacity. The larger tires on a gas chassis typically do not turn as sharp the smaller tires.
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04-13-2013, 09:49 PM
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#8
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Member
Join Date: Aug 2012
Posts: 63
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...if your coach came with 19.5's your rear end ratio is around 4.30,however,if the coach came equipped with 22.5's originally,the ratio will be much lower such as 5.30....tires and rear end determine the final drive ratio...I would think it would be better to stick with original equiptment size! ...just my .02 !!!....safe travels! 
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Tom, Eileen,and Sandy...10y.o. Jack Russell
Amateur Radio Operator K3RX 20113 Winnebago Vista 30T
Ford F53/V10. 5 Star tuned, 2015 Subaru Forester 6 speed Manual toad 
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04-13-2013, 10:40 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Jul 2011
Posts: 2,200
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I really could not tell you for sure since ours has 24.5's. I do know we have a large amount we can carry even with a 200 gallon fuel tank full and we can tow a lot too.
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Thom and Christine having fun in a 1993 Monaco Crown Royale Signature Series 40ft 300hp RV. Towing a Fiat 500 Abarth and a Harley.
Our blogged repairs and travels
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04-14-2013, 05:53 AM
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#10
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Nov 2009
Posts: 1,363
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Quote:
Originally Posted by Mody n Domy
I have a 38' gasser with 19.5s don't know if it rides any different than 22.5. But I do know its time to replace tires and I am glad I have the 19.5s they seam to be cheaper. You should change to new tires after 5 to 7 years even if there not worn out a couple bucks here and a couple there all adds up
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you should read more about who recommends that "change" interval and stop preaching it like its gospel. That is nothing more than fear mongering... michelin has put in print that their tires can go 10 years. And that info is available on the internet... just like the made up 5yr life span of rv tires.
As for cost... its like $50/tire... x 6 so barely the cost of 1 low end 19.5 tire for the 22.5. There is a dramatic difference in a 19.5 chassis versus a 22.5. Those are facts... not speculation.
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04-14-2013, 05:55 AM
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#11
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Nov 2009
Posts: 1,363
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Quote:
Originally Posted by tuffr2
The larger tires on a gas chassis typically do not turn as sharp the smaller tires.
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really? 
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04-14-2013, 06:12 AM
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#12
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Senior Member
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 16,706
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Puzzled.
Does not make sense to me to go up or down in tire size, unless you are considering getting another rig?
I know I dont have room for an upsize to 22.5.
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04-14-2013, 06:36 AM
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#13
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Senior Member
Thor Owners Club
Join Date: Jul 2012
Location: Traverse City MI
Posts: 225
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No one has mentioned the increase in unsprung weight with the change to 22.5 from 19.5. Is it not as important as in the much lighter weight passenger car suspensions? Would the weight difference be negated if you went with alloy wheels/22.5s? Hmmmm
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Maisie: 2023 Newmar Bay Star 3225, Sparky: 2017 Chevy Spark w/Blue Ox tow bar. 2019 Newmar Bay Star Sport 3014, 2013 Thor ACE 29.2
It is a mistake to allow any mechanical object to realize that you are in a hurry.
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04-14-2013, 06:54 AM
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#14
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Registered User
Join Date: Mar 2013
Posts: 1,919
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Quote:
Originally Posted by tomrx1
...if your coach came with 19.5's your rear end ratio is around 4.30,however,if the coach came equipped with 22.5's originally,the ratio will be much lower such as 5.30....tires and rear end determine the final drive ratio...I would think it would be better to stick with original equiptment size! ...just my .02 !!!....safe travels! |
im not to sure that is accurate with F53 chassis. My first motor home had 16" tires with a 5:30 ratio, my current motorhome has 19.5" tires with a 5:30 ratio and a motorhome I just worked on has 22.5" tires with 5:30 gears. That one cruise at a few hundred rpms less than mine at the same speed. I believe the larger chassis 24K and 26K chassis have the 22.5" tires with a 6.13 gear in them.
The 4:30's I think are limited to the E class motorhome.
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