SumoSprings Solo Custom Helper Springs - Front Axle

Always a pleasure to do business with etrailer.
Great communication fast service.
Highly recommended1556048

Charles

4/14/2024

Good upgrade. Noticeably reduces rocking

Installation was a pain. The instructions were impossible to accomplish. I used YouTube and found a much easier way to install. But still had to have my son install the rear sumos.3140349

by: TR06/04/2022

They do what they were intended to do - reduce the effect of slightly overloaded factory springs.1308449

Tr

6/5/2023

Great easy solution for loaded 4x4 170 Sprinter.

by: Aaron 05/10/2023

Mercedes-Benz Sprinter

Installed on a fully loaded Sprinter Camper Van. Major improvement to the handling of the Van. Helper springs were also installed on the rear. Overall, van rides much better and seems to respond better at highway speeds and windy conditions.1575202

by: Mike 12/13/2022

2020 Ram 3500

I bought these for my 2020 4x4 Sprinter van, 3500, 144" WB, dually. I purchased both the front & rear springs. Installation wasn't too difficult and only took a few hours for each set working alone.
I had these on a Dodge 3/4 truck before and they helped with the sway when our camper was loaded and they worked pretty good.
Having put about 25,000 miles on them now I can honestly say that there is a noticeable difference under a variety of conditions. The van is inherently top-heavy so it's quite a chore to settle that down but these springs definitely made a difference and have made driving more comfortable, even in high side winds.1484197

Installation was easy. I didn't even have to jack the front end of my 2018 4WD sprinter up. I wish the stud in the sumo spring was at least 1/4" longer. The stud that was in the sumo spring was just long enough to be flush with the end of the Nyloc nut. It should have protruded out at least 1/8". The ride was improved but I haven't really taken a long trip yet. Delivery was very quick.1169698

Gary S.

10/2/2022

The front Sumo springs still seem to be a correct choice for me. The ride is improved particularly with regard to sway during high winds and during turns.

by: Mark 01/04/2022

Mercedes-Benz Sprinter

These gave me the increased spring rate I was looking for in the front end of my 4x4 Sprinter.

The added spring rate did overwhelm the damping provided by the stock struts though, making for a bouncy ride, so I then added Bilstein B6 struts, which solved the problem. With this combination, the van handles significantly better with the light loads I typically carry.1236502

Superfast shipping from eTrailer. Installation is a heck of a lot easier if you have a cordless ratcheting wrench and a decent jack. It definitely helps with the sway on the Sprinter.1306926

Just installed my springs. The springs were the correct item and look very well made. Raised my van 3/4". Tomorrow is the test drive. I have a feeling I will be very pleased.1486720

fast shipping, good price 1504665

Excellent service. 1254618

by: William 05/23/2023

1585624

super speedy with no delays....Awesome 1047026

1139719

1546410

1097203

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

Click to Enlarge

Click to Enlarge

Click to Enlarge

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

Click to Enlarge

Click to Enlarge

Click to Enlarge

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

Click to Enlarge

I originally purchased the yellow sumo for additional support when hauling a small trailer or taking trash to the dump so I wouldn’t strain the vehicles suspension that I just replaced . I also never like to see a truck squat . Yellows were too stiff when unloaded so I got these blues sumo and it was a great decision . The ride type is back to original “comfortable” and the sumo still provides great handling when cornering reducing body sway / shock absorbing bumps. A good investment !1568966

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

Click to Enlarge

Click to Enlarge

These were shipped to me mid-trip so I had a good chance to do a before and after with same loads/ same roads for 3100 miles. They were easy to install (in my daughters driveway) in about an hour with one reluctant bolt in the original bump stop. I did not install the hard spacer, I figured I’d add it later if needed. I was able to do the install w/o jacking up the whole truck using a 1 1/2 ton jack under the hitch receiver w/ a jackstand next to it. I needed just a few inches as there’s lots of room under the stock height truck (I was lying on a piece of cardboard). The helper springs didn’t quite touch the axle when the jack was removed. When I first drove it in town with the Sumo’s on it they were not really noticeable. When loaded up with my 22’ Livin’ Lite Axxess trailer (4300lbs with 650lb hitch weight) the rear end would squish into the overload springs a good 3/4” but the truck was about level w/o rear end sag.
Driving home over many of the same roads I noticed it was better over railroad crossings and rhythmic bumps on the highway that previously pitched it fore and aft. The trucks manners were much better overall during big hits (like hitting a curb- yup) and pulling off-highway. The trailer is low so it doesn’t go very far off road so I can’t report on that.
Overall for ease of ordering, of install, simple usage w/o need of airlines and effective control of the rearend of the truck and the trailer I feel they deserve the 5 stars.1590937

I bought and installed the 1000lb Sumo Solo springs to help alleviate rear end squat on my 2024 GMC Canyon Denali when pulling my boat. My boat trailer has a long mono tongue with no weight distribution installed. The boat weighs in at about 5500lbs, the truck fender lip measures 38” high unloaded, once I dropped the hitch down on the ball and the Sumos picked up the load, the fenders measured 36.25” equating to an inch and 3/4 squat. Empty the Sumos have an apx gap of 7/8” above the frame rails. The Sumos were recommended over the Timbrens for my situation of infrequent towing with this truck and to maintain the best ride possible when not towing. So far my ride is virtually unchanged when empty and feels controlled when towing. Installation is straight forward but the instructions could be a little clearer with a diagram showing the intended location of the springs. Luckily an etrailer customer had already done the install and provided some pics so there was no question. I chose to remove the tires to have good access and I’d do it again this way. I supported the truck with a jack stand under the receiver. IMHO the proper method to locate the over frame upper clamp brackets is to push the forward clamp as far forward until it contacts the bed stiffener and you’ll be in the correct location then let all the hardware hang to position itself, tighten as required and enjoy.1771904

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

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

Click to Enlarge

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

Click to Enlarge

Click to Enlarge

Click to Enlarge