Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class B Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 04-19-2021, 09:37 AM   #1
Senior Member
 
rvtrekers's Avatar
 
Join Date: Jun 2016
Location: San Mateo, CA
Posts: 612
Sumo Springs and Class B -Yes or No

Another group I belong to of class B owners has many threads of owners putting sumo springs on their class B. How common is it for owners to put Sumo springs on their class B's?

As a former class A owner I refrained from adding Sumo springs to it. Instead I focused on the cheap handling fix, Kona shocks, safety steer and Henderson SS401 rear track bar it improve handling and sway. That was enough for me.

Thanks!
__________________
Bill & Laurie | 2021 Winnebago Solis 59px (no pop top)
rvtrekers 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 04-19-2021, 09:46 AM   #2
Senior Member
 
Winterbagoal's Avatar
 
Join Date: Mar 2017
Location: Sarnialabad, Peoples Republik of Canuckistan
Posts: 2,057
Depending on how close to the GVWR you are when loaded for travel, a set of Sumo Springs might mitigate curb roll somewhat. Other than that, I don't see much value. My Roadtrek was loaded right to the GVWR for travel, and the curb roll was pretty bad sometimes. Slow down and hit the approaches/thresholds on an angle helped, too.
__________________
2018 (2017 Sprinter Cab Chassis) Navion24V + 2016 Wrangler JKU (sold @ ????) - 2016 Sunstar 26HE (sold @ 4600 miles) - 2002 Roadtrek C190P (sold @ 315,000kms)
Winterbagoal is offline   Reply With Quote
Old 04-19-2021, 10:14 AM   #3
Senior Member
 
Join Date: Feb 2021
Posts: 146
I'm on my second class B. I'd say yes to the sumo springs. Cheap and easy to install. Controls the rear end body roll which you will have. You can adjust the amount of roll/stiffness with spacers. They don't work wonders, but they do help. If you don't like them, easy to remove. Unless you get an air suspension, the ride in the back will be bouncy so hopefully you won't be riding in the back too often.
Danny969 is offline   Reply With Quote
Old 04-19-2021, 10:51 AM   #4
Senior Member
 
Join Date: Jul 2014
Posts: 30,195
Anti sway bars stop body roll without changing the spring rate.
They work across the axle, counteracting roll from both sides. The more it tries to roll, the more it fights to stop it.

Sumos stiffen each springs rate and by doing that will stop some body roll.
The low side spring will resist compression but the high side will still expand.
twinboat is offline   Reply With Quote
Old 04-19-2021, 12:23 PM   #5
Senior Member
 
rvtrekers's Avatar
 
Join Date: Jun 2016
Location: San Mateo, CA
Posts: 612
Thanks I fully understand the principle of the sumo springs. Just looking to determine how common they are within the class B community.
__________________
Bill & Laurie | 2021 Winnebago Solis 59px (no pop top)
rvtrekers is offline   Reply With Quote
Old 04-19-2021, 04:09 PM   #6
Senior Member
 
Join Date: Feb 2021
Posts: 146
If you're just wondering how common, I think just about every class B manufacturer puts them on.
Danny969 is offline   Reply With Quote
Old 04-20-2021, 08:22 PM   #7
Junior Member
 
Paul2006T4R's Avatar
 
Join Date: Apr 2021
Posts: 5
Yes, do not even hesitate on Sumo springs on your Ram Promaster chassis. I added sumo springs in the rear only on my Carado Banff (PM 2500) and it made all the difference in the world on the road. The van felt far more stable while driving.
Paul2006T4R is offline   Reply With Quote
Old 04-21-2021, 06:14 PM   #8
Junior Member
 
Join Date: Jun 2017
Posts: 25
Quote:
Originally Posted by Danny969 View Post
If you're just wondering how common, I think just about every class B manufacturer puts them on.

I have 2016 PW Lexor TS. OEM were the black Sumo Springs. Removed and installed yellow ones for more stiffness. I would bottom out coming out of storage drive way. Now when going slowly and at the correct angle, I can avoid bottoming out. Also it helps with the floating feeling when on some Az highways. Lots of PW owners have replaced with the stiffer yellow ones over the OEM black ones.
Rlum is offline   Reply With Quote
Old 04-22-2021, 08:36 PM   #9
Senior Member
 
rvtrekers's Avatar
 
Join Date: Jun 2016
Location: San Mateo, CA
Posts: 612
Quote:
Originally Posted by Paul2006T4R View Post
Yes, do not even hesitate on Sumo springs on your Ram Promaster chassis. I added sumo springs in the rear only on my Carado Banff (PM 2500) and it made all the difference in the world on the road. The van felt far more stable while driving.
Having driven my Solis now for hundreds of miles it is clear to me there is no justification to spend the money. It handles like a sportscar. I'm very satisfied.

To be transparent I drove a 28' class A motorhome with tow vehicle for the past 5 years.

Understanding the principle of Sumo springs it makes sense to me when people with a poor performing class B decide to layout the cash to try and fix the issue.
__________________
Bill & Laurie | 2021 Winnebago Solis 59px (no pop top)
rvtrekers is offline   Reply With Quote
Old 04-22-2021, 09:41 PM   #10
Senior Member
 
Winterbagoal's Avatar
 
Join Date: Mar 2017
Location: Sarnialabad, Peoples Republik of Canuckistan
Posts: 2,057
So, the original post/question was just baiting? You'd already formed an opinion, and just wanted to lure other forumites in, to gain their opposing opinions, to denigrate them? Well done.
__________________
2018 (2017 Sprinter Cab Chassis) Navion24V + 2016 Wrangler JKU (sold @ ????) - 2016 Sunstar 26HE (sold @ 4600 miles) - 2002 Roadtrek C190P (sold @ 315,000kms)
Winterbagoal is offline   Reply With Quote
Old 04-23-2021, 04:24 PM   #11
Senior Member
 
rvtrekers's Avatar
 
Join Date: Jun 2016
Location: San Mateo, CA
Posts: 612
Quote:
Originally Posted by Winterbagoal View Post
So, the original post/question was just baiting? You'd already formed an opinion, and just wanted to lure other forumites in, to gain their opposing opinions, to denigrate them? Well done.
No I posted prior to taking delivery of the Solis because the Facebook group had many people adding Sumo springs which I thought was odd for a class B. I decided to post and see what responses I would get that might inform me as to whether I would have to add sumo springs.

Subsequent to the post I took delivery of my Solis and put over 250 miles on it in two days driving in various conditions including high winds here in California.

I'm very relieved my rig handles very well, does not have a handling issue I need to fix, and will not need Sumo springs but again I downsized from a class A.

I did not denigrate anyone. Why would someone spend money on Sumo springs unless there was an issue they were trying to fix? I think that is a reasonable question.

But I'm open and maybe Sumo springs are a status symbol which people add when there is no issue that needs to be fixed?

Everyone should spend their money as they see fit is my felling.

Anyway thank you for adding to the richness of the conversation!
__________________
Bill & Laurie | 2021 Winnebago Solis 59px (no pop top)
rvtrekers is offline   Reply With Quote
Old 04-28-2021, 08:54 AM   #12
Junior Member
 
Join Date: Dec 2018
Posts: 6
the new coachman beyond has the sumo springs installed from coachman . it is the ford transit 3500 i have no knowledge how the van handled without them it does drive and handle very well
Nortons RV is offline   Reply With Quote
Old 05-09-2021, 04:52 PM   #13
Member
 
kmessinger's Avatar
 
Winnebago Owners Club
Join Date: Nov 2018
Posts: 46
They were about the #1 mod for the Travato. Now the Travato comes stock with them front and rear.
__________________
2022 Winnebago Travato 59KL
2017.5 Winnebago Travato 59K
2008 Sportsmobile Sprinter
kmessinger is offline   Reply With Quote
Old 06-12-2021, 02:28 PM   #14
Junior Member
 
Join Date: Jun 2021
Posts: 2
Coachman installs sumo springs on all the new B vans that they manufacture. Sprinter, Ford Transit and Dodge Ram. On their website he explains why.
TerryHK is offline   Reply With Quote
Reply

Tags
class b



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
F53 Class A - kill the rocking. Sumo Springs or Rear Anti-Roll bar? creativepart Ford Motorhome Chassis Forum 27 11-13-2017 11:19 AM
Air Bags vs Sumo Springs on gas Class A TGR Class A Motorhome Discussions 18 10-23-2017 06:08 AM
Front springs sagging / Sumo Springs??? bruceh Workhorse and Chevrolet Chassis Motorhome Forum 2 07-09-2014 02:42 PM
sumo springs and trac bar leptronjohn Ford Motorhome Chassis Forum 5 10-11-2013 11:21 AM
Koni FSD Shocks and Sumo Springs on Class A johnp77777 MH-General Discussions & Problems 1 10-14-2012 12:43 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 02:04 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.