SumoSprings Solo Custom Helper Springs - Rear Axle

by: Lester06/10/2023

I waited 14 months and 16K miles (8K towing) to do this review. My experience started off poorly with a competing product which was the choice of etrailer’s automated helper—there is NO substitute for an actual person. I recommend using the automated systems to get ideas, then talk to a person. The first SumoSpring etrailer sent was the best of the standard options, but didn’t work well with my dually setup using Sulastic shackles. However, due to the tight partnership etrailer has with their suppliers, SumoSprings really went the extra mile to match my customized suspension needs. I now have a fantastic no maintenance system that rides superbly whether empty bed (soft), yet when towing squats less than “1/2 and is smooth with over 3K+ gooseneck pin weight added—this is hard to achieve. Honestly, I didn’t realize how hard this would be at the outset, but can now appreciate all the work SuperSprings did. I am sure they would do the same for any customer—so buy with confidence. Kudos to etrailer and SumoSprings.1598694

by: JerryM10/21/2019

Installation took about half an hour. The fifth wheel with a gvw of 15000# used to sink the truck box significantly. After installing the Sumo Springs there is a minimal sinking of the truck. I highly recommend!719214

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by: David F07/27/2021

Ford F-250 Super Duty

They do a good job at supporting the the rear end of my F250 for towing my travel trailer. More affordable and simpler to install than air bags. I also installed the EZ lift springs. They work great together.1105971

David F.

7/28/2022

Working Great

Great product, definitely gets my truck leveled out with our 5th wheel trailer! Easy to install, would highly recommend Sumo Springs. 132624

Mark S.

5/27/2015

I would highly recommend etrailer, there customer service unsurpassed, great products, great company!

Excellent product. Delivered on time. Very easy install. My '16 F250 squatted slightly with my camper on, sunk 2" at the factory jounce bumpers, and slightly swayed on curves. Problem solved. You may only need to slightly lift the truck by putting a car jack under the hitch, as I did. I only needed to raise mine 3-4" and no need to remove wheels. Also, it is easy to reattach the factory bumpers to a harmless location under the frame. So, if you sell your truck in the future you can easily find and reinstall the originals....and keep the Sumos for your next truck....if they fit.1039320

Fast customer service. I easily install them on the rear of my two thousand five F-250 4x4 with factory overload springs. Since installing it is a much smoother ride when unloaded and now only squats about 1 1/2 inches when pulling 7500+ pound camper. The hardest part about installing these was removing the factory bump stops.613107

by: Bob F05/05/2020

Ford F-250 Super Duty

I purchased the Sumo Springs due to rear end sag on my F-250. They pretty much fixed the problem which was caused by too-weak springs in the first place IMO. No change in the ride quality either loaded or unloaded detected. Prompt shipment & knowledgeable sales staff. Very helpful.792715

Etrailer was quick and accurate, shipping was fast! Highly recommend!907015

This is probably the best thing I could have done for my truck. The install was easy. Without these, the truck would drop 3 1/2 inches in the back with the RV on. Now only one inch. The truck is a 2015 F-250.553859

Lee

8/15/2019

After a year of use, Im very happy with the Sumo springs. Much better ride and nobody flashes their hi beams at me anymore because the truck rides nearly level even with the weight of the 5th wheel on.

by: Phillippe07/03/2021

Don’t even notice they’re there, meaning when they’re engaged the ride is still smooth and not stiff1082726

Customer service was very friendly,helpful,and professional. Receive my order on time. I Would strongly recommend your service to anyone who have the need for your products..944174

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1001387

I believe it’s going to be a great addition to my truck when pulling our RV. Looking forward to a smoother, more even ride. I left the 2x4 blocks in overnig8ht and drove around to ensure a good seat for the springs.1540479

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by: Jeremy01/04/2023

I installed Sumo Springs on our 06 Xterra right after we bought our Casita 17' trailer. The back of the X squatted a bit more than I liked. I had also noticed before some tendency to bottom out if the car was full of people and stuff. These ingenious devices are a perfect solution for me! They are about 3/4" clear of being engaged with the axle when unloaded, so the ride is not overly affected, but progressively take up some of the weight when the back end starts coming down with load. It now sits very nicely with the trailer connected, no weight distributing hitch and stuff in the back, and no more bottoming. We've put a good number of miles on the X in the last year, towing and not towing, and they are still doing the job.

I should note, the back of my Xterra is lifted about an inch with AAL springs. If that were not the case, the Sumo Springs would be engaged all the time. That will vary with vehicle.

I will also note that they are non-adjustable, unlike airbags. I kinda like that, I didn't want to mess with adjusting air pressure and such. But once they do start kicking in as one or both wheels travel, they do stiffen it up quite a bit. I mean, there's no way around that; you can't take load without stiffening the suspension. As such I think they inhibit upward axle articulation a bit when 4-wheeling, but for us that's not a big deal. Since they do not connect to the axle, they don't affect downward articulation at all.

The pics are shortly after installation, one with the car unloaded, and two with trailer and gear loaded up.1492849

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Very easy installation in about 20 minutes. Very ingenious concept as opposed to bolt on leaf style helper springs1552548

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by: Dan08/01/2023

These Sumo Springs were easy to install, even for a 70 year old guy. I tow a 7,000lb camper and even tho I have a nice WDH I still had som sag on my Tundra. These helped level it out when towing and got rid of “some” of the bounce. They were really a godsend when I overloaded the bed with about 2,000lbs of pavers. That weight squished the Sumos significantly but the truck drove and rode great. Better and less expensive than air bags.1636874

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Gave it 5 because of ease of install - note they use SAE threads 9/16, truck frame and oem is metric 15mm wrench. Makes no difference but don't use oem nuts on spring. I installed all shims supplied and this left about 3/4" gap so hoing its the best for my needs. Easy to reduce if needed.1522522

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The SumoSprings Solo came to the RV Resort today. I installed them on my Titan SV today in less than an hour. Only drove 10 miles with them and they are what I was looking for. In my opinion it was a needed upgrade and thumbs up!1323587

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by: Zach01/24/2024

While these worked great for the first few months and helped level the load, they have now become deformed and squished out of shape permanently. We have a slide in camper that is on the truck for only for trips otherwise the truck is unloaded and off the bumps. I did not expect them to deform so much, and so easily after only a year of use.1713830

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by: William01/13/2024

I have had these on my Jeep Gladiator for over a year now and I still like them. Sumo Springs really help with sag when towing my Scamp camper trailer and when the truck bed is loaded with stuff. When it is cold outside they are stiffer and I can feel when they hit the stops on hard bumps. Sumo Springs are a very easy overload spring option with factory lift.1710020

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Fairly simple to put on but need to work around the brake lines and bed cross beams. I haven’t tried it yet with weight. I have enclose pic of drivers side. Maybe can’t tell from the pic but there is space and flexibility around the lines around bolt.1748975

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Straight forward, simple, replacement for OEM springs. These springs make contact with the lower arms all the time and definitely help dampen the bounce effect from a heavier steel bumper. Any rolling effect from uneven roadways and turning is also reduced, it feels the vehicle is more stable. For my situation, this is the first step to take before considering replacing shocks, etc., and is very economical. I'll give it more time, but I believe this is all I'll need to do. Thanks etrailer! Quick shipping!1530885

by: Kevin 04/29/2024

They worked pretty good. They kept my vehicle from bottoming out when towing my 5th wheel camper. They also helped to avoid bucking and chucking upon acceleration. In addition to these though I also purchased RAC rear suspension enhancement springs but having towed with them yet. Hoping for some improvement in general handling.1775533

by: Robert04/04/2024

Hello, i installed the Sumo springs on my 2020 M/B 2500 pleasure Way camper van 19.5 foot, if you do not want to go in for the full suspension upgrades for 5 to 6 thousand dollars the Sumo spring is a
decent up grade to help with sway, we aren’t off roaders campers
but they work nice in unimproved campsite. I have about 4500 miles on my camper since I installed them which took about a hour. It did raise the camper by about 1/4”.
I just used a floor jack and big flat screw driver for the back and deep well socket for the front ones. Sorry I didn’t take a video or picture. But so far I would recommend the sumo springs it is better then stock bump blocks.
And thanks to etrailer for getting me the right setup
for my camper.1759548