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Open Roads Forum  >  Travel Trailers  >  Modifications and Accessories

 > Sumo Springs on my Toy Hauler

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Rbertalotto

Massachusetts

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Posted: 08/22/22 05:48am Link  |  Quote  |  Print  |  Notify Moderator

Two hundred mile trip yesterday ....and in a word..."FANTASTIC". Hard to believe how four urethane cylinders could improve the ride of the Tow Vehicle. No more jerky jerky when going over bridge expansions. No more bucking on washboard roads. This trailer is a toy hauler. Designer to carry a 1000 pound toy. When unloaded the suspension is very stiff. These Sumo springs smooth the suspension right out. I bought them from Amazon so I could return them if they did not work as advertised. But I'm starting to believe they might be the best $500 I've spent bon the trailer.
All the internet engineers on this thread might be disappointed that they actually work. Sorry about that.
As far as the post about them not contracting the chassis. Watch the video again. That picture was with the chassis jacked up and the whole spring system hanging. When you install them. You add spacers to maintain about 1/2" of compression.
And as far as the comment about the Sumo springs bending or otherwise damaging the frame rails..... Totally ridiculous..... And I AM an engineer![emoticon]


RoyB
Dartmouth, MA
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Busdriver

Shepherdsville Ky 40165

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Posted: 08/22/22 05:54am Link  |  Quote  |  Print  |  Notify Moderator

Have them on my truck & trailer, never a problem in 4/years


Busdriver 2019 2500 Chevy Duramax , - 2017 Grand Design 303 RLS

Rbertalotto

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Posted: 08/22/22 06:35am Link  |  Quote  |  Print  |  Notify Moderator

Busdriver wrote:

Have them on my truck & trailer, never a problem in 4/years


As we sometimes say in the world of engineering...."PFM"!

Grit dog

Black Diamond, WA

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Posted: 08/22/22 09:15am Link  |  Quote  |  Print  |  Notify Moderator

afidel wrote:

Tyler0215 wrote:

Sounds like $500 wasted to me. The hard jounce when the Sumos meet the frame will be hard on the trailer frame.
Sumo springs on a truck sound equally bad.


Sumo springs or similar can be good on a 1 ton or 4500 pickup to provide some unloaded cushioning that the heavy spring pack lacks.


That is exactly opposite of what they do, but….


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
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Grit dog

Black Diamond, WA

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Posted: 08/22/22 10:29am Link  |  Quote  |  Print  |  Notify Moderator

Glad to hear you’re happy with your purchase, but Trying to wrap my head around something with a stiff suspension, how making it stiffer makes it smoother.
Have used Timbrens and other similar suspension aids in the past, for trucks hauling more than they should, not less.

JIMNLIN

Oklahoma

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Posted: 08/22/22 12:12pm Link  |  Quote  |  Print  |  Notify Moderator

Busdriver wrote:

Have them on my truck & trailer, never a problem in 4/years

I have a pair of Sumo on the wifes 1500 chevy rear suspension just for pulling my 10k car hauler with a 7440 lb blue tractor/implements. No issues in over 7 years.
I got the idea from one of my haulers forums I frequent.
Scale house DOT doesn't like a sagging truck and for years we used air bags to level the load. Then some haulers started using sulastic springs like the Sumo/Timbrens instead which acts the same as a over load spring. In this type of work truck owners may run a 100k miles a year or more. Some report their Timbrens or Sumo's have several hundred thousand miles of service on their truck or trailers.

Excellent vid quality .
I would prefer a flat surface at the top end instead of a 2" wide U channel flange.


"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers

'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
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