RV.Net Open Roads Forum: Class C Motorhomes: Sumo Springs

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Class C Motorhomes

Open Roads Forum  >  Class C Motorhomes  >  Class C

 > Sumo Springs

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next
Sponsored By:
okiejoe

Oklahoma City

Senior Member

Joined: 02/27/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 04/23/19 08:41pm Link  |  Quote  |  Print  |  Notify Moderator

Just installed Sumo Springs on the front of our 2015 E450 Class C Thor Chateau 31W. It seems to done what I was hoping for, although it did raise it by about an inch and a half, our coach also has Helwig anti sway bars front and rear plus Bilstein shocks and Safety plus Steering control.
What I am wondering is if I add Sumos to the rear according to Sumo Tech support it will raise the rear also just a little which I don’t have a problem with but for those who have done this does your coach seem to ride stiffer in the rear after adding the sumos to the rear.

Dakzuki

Carnation, Wa, USA

Senior Member

Joined: 11/01/2002

View Profile



Good Sam RV Club Member

Offline
Posted: 04/24/19 12:04pm Link  |  Quote  |  Print  |  Notify Moderator

It will be stiffer. How stiff depends on the rate of springs installed. I have them on the rear of my Sprinter based RV and it's stiffer,

After lifting the front that much I would be inclined to get the wheel alignment checked. The E series has a lot of geometry change with vertical wheel movement due to the swing axle suspension and you just moved the static position 1 1/2 inches.


2011 Itasca Navion 24J
2000 Chev Tracker Toad


okiejoe

Oklahoma City

Senior Member

Joined: 02/27/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 04/24/19 06:52pm Link  |  Quote  |  Print  |  Notify Moderator

Yea, that’s my next move, get the alignment checked. I just love how sumo doesn’t mention that it’s going to raise the front of coach.

carringb

Corvallis, OR

Senior Member

Joined: 07/28/2003

View Profile


Offline
Posted: 04/24/19 08:43pm Link  |  Quote  |  Print  |  Notify Moderator

I wouldn't worry about it. It's not so much "lifting" it, as much as it is restoring lost ride height from the added coach weight. But...on radius arm suspensions, adding front ride height case reduce caster, so an alignment is a good idea.


Bryan

2000 Ford E450 V10 VAN! 450,000+ miles
2014 ORV really big trailer
2015 Ford Focus ST


deewhite0612

Ontario

Senior Member

Joined: 07/07/2007

View Profile



Good Sam RV Club Member

Offline
Posted: 06/21/19 01:35pm Link  |  Quote  |  Print  |  Notify Moderator

What was the cost to get them installed?


Michael and Daryl (Dee)
2006 Newmar Kountry Star 3778
2008 Saturn Vue XR V6
Blue Ox Alladin
Brake Buddy Classic


CC38EL

Florida

Full Member

Joined: 02/16/2005

View Profile



Good Sam RV Club Member

Offline
Posted: 06/22/19 10:35am Link  |  Quote  |  Print  |  Notify Moderator

I installed, by myself, a set of Sumo Springs Bump stop replacements on my Chevy Express 4500 based Freelander front and rear. As you noted, it did increase the ride height in the front...for me about 1/2 to 3/4".

The rears were not as noticeably higher...they just sat on the axle at about the same height as before. On the Chevy, the factory rear bump stops did not touch. The Chevy factory fronts did touch all the time although not compressed.

What a difference..right out of the box. Not sure I need another alignment but the next short trip should tell.

Not hard to install if you have a capable jack and jack stands....or a mechanic friend who lives next door like I do. [emoticon]


Jim
2018 Coachmen Freelander 27QB

FunTwoDrv

NC

Senior Member

Joined: 11/16/2010

View Profile


Offline
Posted: 06/24/19 10:03am Link  |  Quote  |  Print  |  Notify Moderator

Jim, I put the Sumos on the front of our Chevy 4500 and had about the same results. They did impact camber a tad but, not enough to warrant the effort to try to adjust. However, I did experience pretty severe cupping in the center of the two front tires. I could not get a definitive answer from either the tire mfg or the alignment shops on just what caused this. I just replaced all the tires and took the Sumos out just in case? Sumo lists two part numbers for the 4500. They advised me to use the firmer version but are now saying the softer one will work just fine. Do you recall the part number you installed?

CC38EL

Florida

Full Member

Joined: 02/16/2005

View Profile



Good Sam RV Club Member

Offline
Posted: 06/24/19 10:15am Link  |  Quote  |  Print  |  Notify Moderator

I put in the SSF-204-47s. Did not know there were two different 'firmness' parts.

Thanks for the tip on the cupping.

CC38EL

Florida

Full Member

Joined: 02/16/2005

View Profile



Good Sam RV Club Member

Offline
Posted: 06/24/19 10:20am Link  |  Quote  |  Print  |  Notify Moderator

I see now that I missed the SSF-204-54s. They are rated 2500lbs. We'll watch the tires for sure.

I wonder, since I installed the rears as well, that the height rise I got (which isn't much) may offset the bouncing that causes the cupping. Will have to see.

FunTwoDrv

NC

Senior Member

Joined: 11/16/2010

View Profile


Offline
Posted: 06/25/19 07:10am Link  |  Quote  |  Print  |  Notify Moderator

Jim,
We have the -54's. They made a significant impact on "porpoising"... those along with a full set of Bilstiens really firmed the ride up and reduced roll as well.
I put the stock bump stops back in and the ride is much smoother but at the expense of a tad more porpoising. I suspect we'll order a set of the -47's as a compromise.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next

Open Roads Forum  >  Class C Motorhomes  >  Class C

 > Sumo Springs
Search:   Advanced Search

Search only in Class C Motorhomes


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.