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  1. Vehicle Suspension
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SumoSprings Solo Custom Helper Springs - Front Axle

SumoSprings Solo Custom Helper Springs - Front Axle

Our Price: $258.99
You Save: $159.99
Vehicle Suspension

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1,000-lb Capacity. Upgrade your vehicle's front suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Solo Custom Helper Springs - Front Axle part number SSF-111-40 can be ordered online at or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension

  • Jounce-Style Springs
  • Front Axle Suspension Enhancement
  • Light Duty
  • SuperSprings Intl

1,000-lb Capacity. Upgrade your vehicle's front suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.


  • Helper springs upgrade your vehicle's front suspension for improved driver control and comfort
    • Support heavy front-end loads to keep your vehicle level
    • Help to absorb bumps and shocks
    • Minimize sway
  • Progressive load control - springs compress according to the weight of your cargo
    • Lighter loads - springs compress easily at first for soft engagement and a less bumpy ride
    • Heavier loads - springs compress by as much as 80 percent for support
  • Springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns
  • Durable microcellular urethane
    • Works in temperatures from -25 F to 200 F
    • Resists damage caused by oils, road salts, and UV rays
  • Minimal lateral expansion - springs compress vertically instead of to the sides so they aren't easily damaged when operating in tight spaces
  • Maintenance-free - no tubing to run or air pressure to monitor like with air springs
  • Simple, no-drill installation
  • 2 Jounce-style springs included
  • Made in the USA


  • Weight capacity (at 50-percent compression): 1,000 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee

Front Suspension Support

A heavy front load can cause front-end sag as your factory suspension compresses under the weight of the load. This means that the front axle is trying to support not only the extra load but also the weight of your vehicle. And because there is less weight on your rear axle, your rear tires make less contact with the road, which causes problems with traction, steering, and braking. SumoSprings upgrade your vehicle's factory suspension to level your vehicle, improve driving performance, and keep your ride comfortable.

Installed spring when it is not compressed

SumoSprings provide progressive load control - the more you load them, the stiffer they become. With a lighter load, the springs will compress easily for soft engagement and a less bumpy ride. The closed-cell urethane material allows for smooth contact between the springs and your vehicle. And the springs act like a shock absorber to dampen road vibration.

Installed spring when it is compressed

The springs can also compress by as much as 80 percent to support a heavy front load and to help your factory suspension bear up under the load. This evens out the weight, which levels your vehicle and ensures that your rear tires are making better contact with the road. A level ride means that you have improved driving control, ensures safe headlight aim, and helps to minimize sway. The springs also support your factory suspension, which helps prevent sagging and reduces bottoming out.

The springs work independently from one another to support each side of your vehicle. This action helps to reduce body roll when you make a sharp turn. This also helps compensate for an off-center load.

Durable, Custom-Fit Springs

These microcellular urethane springs are tough. They resist abrasion, oil, salt, and UV rays that can more quickly wear out other springs, and they perform well in temperatures ranging from -25 F to 200 F (-33 C to 93 C).

SumoSprings compress vertically with minimum expansion to the sides, so they won't be damaged by nearby mechanical parts and they fit safely into tighter spots. And unlike air springs, SumoSprings require no maintenance or adjustment.

The helper springs are custom designed to fit your vehicle, and they install easily - no drilling required.

SSF-111-40 SuperSprings Sumo Springs Solo Front Vehicle Suspension Kit

Replaces SuperSprings SSF-104-40

Item # SSF-111-40

Installation Details SSF-111-40 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

SumoSprings Solo Custom Helper Springs - Front Axle - SSF-111-40

Average Customer Rating:  4.7 out of 5 stars   (2182 Customer Reviews)

1,000-lb Capacity. Upgrade your vehicle's front suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.


They help. My 2016 F250 feels more stable towing my 8500 pound travel trailer along with the EZ lift springs, plus Bilstein shocks.
A good combination upgrade I can afford and install myself in my driveway.


The sumo springs have been great on my work truck. I have a 9'6" Fisher xv2 v plow on all wintr, the sumo springs make it manageable around town without taking the plow off. The rest of the year the front end just seems to handle better and be more comfortable than before with just the coils and shocks. I'm thinking about a second set for my other truck.

Ford F-350 Super Duty

2019 F350 6.7l - got these as I needed to balance out the Timbren SES in the rear. They work very well and I would recommend them to anyone who needs to eliminate the pogo effect of a stiff rear suspension. ALWAYS get an alignment after modifying any suspension component and you will have years of trouble free use.


Nissan Leaf

I installed the Sumos on the front of my f350 4WD 7.3 Gas SRW 4.3 Axle. I have the rear axle maxed out with the pin weight of my 5th wheel RVs. I have air bags on top of the rear leaf springs to level up. Wanted to make the front as stable as possible for steering and postponing “death wobble” due to wear. They are holding up well. I can’t honestly say if they affect the ride. It is certainly not worse.

Ford F-350 Super Duty

2022 F350 crew cab 8' bed
Added rear
rebel sumo springs - eliminated rear end jump after hitting pothole, reduced trailer squat, improved ride quality.
Added front sumo springs and rear bilstein 4600 shocks - much softer ride. reduced truck and trailer sway over 60 mph.
waiting on bilstein 5100 front steering stabilizer and front 4600 bilstein shocks. Each step has improved ride quality and handling while towing.


No moving parts. It is just there and appears to be working well. I really cannot tell any difference. Perhaps, I am not pushing the envelope, but maybe that is the point (the envelope has greater limits now). No issues and I guess, piece of mind?



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.


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.


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!


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.


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.


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.


Very impressed. Stopped the Tacoma lean. Also helped with the trailer. I do use a distribution hitch I bought from etrailer. Just bought the sumo spring for other applications. Those little bitty factory bumps where junk. These help with lean, and off road hard bounce.They are great.


These do not fit a 2006 ram 2500. As you can see in the
Photo the bolt holes are WAY off. It also does not sit over the axle tube. My only option at this point to use them is to make a 2nd bracket to bolt the helper too. Very disappointed.


First off, these won't fix worn out suspension components, they are designed to improve ride quality by reducing sag/porpoising, especially on heavier vehicles.
Our 2010 Roadtrek 210P (75k miles) is a great rv but essentially a big heavy tub going down the road. Has the tendency to lean and wallow front to back. New shocks and all suspension is good, as mentioned make sure that stuff is all in good shape.
Pics show the oem stops vs the SS stops. Big difference - you may assume ride gets harsh but not the case. The oem stops were very tired and didn't do much. The preload on the new SS stops is just about perfect - any weight changes are very progressive which takes the harshness out of the ride. I didn't really see any change to ride height either.
Road manners are improved, there's a bit more resistance to lean, but the main difference is that the front end doesn't try to change height as readily with the back end.
Not a big deal to install. Youbdont need to pull the wheels, just turn them side to side to get to the stops. Pop out the old stops and clean the retaining cups with a wire brush and some brake clean. I used syl-glyde on the new stops to help get them into place. I also used a crowbar under the stop to push it into the cup while making sure the 4 tabs captured the top of the stop. Final step was to lower the van and give it a drive, then check to ensure the fit was good. The key here is to clean the cup first and use a bit of lube on the new stop.

Very pleased and I'll be installing SS on the back end soon. Yup, they're pricey but they are good quality with a limited lifetime warranty.


These springs are amazing! They helped tremendously pulling my landscape trailer with all my mowers. I picked up a tractor impliment that I would normally bring a trailer for, but decided to put these springs to the test. Couldn't believe how good my truck rode and handled with 780lbs at the rear of my bed! These springs have exceeded all expectations.
I will say that I initially put the spacer, but found it effected my ride to much so I pulled it. Afterwards it rides like stock.


Just installed the Sumosprings on my 2022 Tacoma,easy install, took about a hour.Truck rides the same with no load on it and will see how it does next time I tow the trailer.Shipping was fast and well packed.


I had to loosen the stabilizer bar in order to install the springs. The stabilizer bar is very tight to the springs. I will be able to see after some driving how much stabilzer bar rubs on the springs. The install was on a 2022 Sprinter 2500.


It made a big difference in how the steering feels at lower speeds on rough roads.


These sumo springs work great on my 2016 Toyota 4Runner. When towing a 3.5k lbs load, the rear sag was significant and negatively impacted the handling. Now with these Sumo springs the rear sags only about 1" when the trailer is hooked up.


These have done a great job of keeping our Ram 1500 level while pulling a trailer and having a load in the bed. No more scraping the hitch while going through dips or over bumps! The ride still feels solid.


I would recommend these if you have an F150. They squat quite a bit from the factory so you have to use something to stiffen up the rear leaf springs. They were easy to install.


We pull an off-road teardrop camper with our 2013 Toyota Tacoma and were looking for a little help with the rear end sag when we have that hitched plus putting some weight in the back of the truck (firewood, water, etc). Our Tacoma is lifted (2.5") but the lift kept the stock springs with an added Deaver leaf to help with the notoriously soft Toyota springs. However, with the shell and ~300 pounds of weight in the back, it still sagged, especially with another 250 lbs of tongue weight from the trailer. The Sumos have eliminated that sag, even with bigger loads in the bed, eliminated body roll (also notoriously bad with Tacomas) and didn't destroy the ride for day to day driving. There might be a slight bit more stiffness when hitting speed bumps, but definitely not bad at all. If anything, I would say it IMPROVED the ride and handling.

The springs themselves were simple to install, less than half an hour start to finish. Some reviews have said they were bumping the frame after installing but we had about 1/2" gap on both sides. The only "specialty" tool would be a torque wrench capable of 90 lbs to get it to spec.

We considered Firestone air bags but after talking with the reps at e-trailer, we decided on these and couldn't be happier. Reasonably priced (half the price of air bags), no maintenance, great customer service...can't argue with anything at all.

by: 01/31/2021

2015 Frontier Crew cab Desert Runner (purchased the yellow Sumo Springs). Easiest install ever! 18mm deep socket and long breaker bar for breaking nuts loose. Removed factory bumpstop, install sumo bracket and retighten U bolts to 58 foot pounds. After installing both brackets, lifted back of truck up 4 inches to install sumo spring with blue lock tight on bracket bolt, tighten sumo spring onto bracket and lowered truck off the jack. Overall it raised the back of my truck bed 1 inch. Ride is stiffer with no bed roll in the turns. Loaded my 24 foot travel trailer with load leveler- equalizer bars and gained 3 inches (less “squat”.) Truck is level now vs nose high (without the sumo springs). Definitely an upgrade that was needed in 2015 when I first bought the truck!!!

Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Will SumoSprings Lift the Front End of a 2017 Ford F-350
    Because the SumoSprings # SSF-111-54 will always be engaged on your 2017 Ford F-350 the stock suspension will not compress as much as it normally would. This will give you the feeling that there is lift though it isn't actually lifting anything it is just preventing the normal amount of stock suspension compression. You could go with a softer spring set, # SSF-111-40, which would allow the stock suspension to compress more than the heavier duty SumoSprings.
    view full answer...
  • Recommended Replacement Suspension Enhacnement for a 2024 Ford F-350
    Yes, the SumoSprings Solo Custom Helper Springs # SSF-111-40 will fit your 2024 Ford F-350 with 4WD. These springs have a 1,000 lb weight capacity (at 50% capacity), is made in the USA, and has a simple no drill install.
    view full answer...
  • Recommended Suspension Upgrades for a 2022 Thor Omni Motorhome
    The Timbren item # TFRSDE you were looking at are confirmed to fit the 2022 Thor Omni motorhome that is built on a 2021 Ford F600 4WD chassis. These have a 12,000 lbs capacity that will provide more load support and stability when you are driving your motorhome. They act as a shock absorber by taking the brunt of bumps and rough roads. There will be no issues using Timbrens in the rear of your motor home and SumoSprings for the front end. For your Thor Omni's front end you will want...
    view full answer...
  • Recommended SumoSprings for a 2017 Ram 1500 with 4" Body Lift
    For your 2017 Ram 1500 with the 4" body lift I recommend the SumoSprings Solo Custom Helper Springs # SSR-307-47 which help to support up to 1,500 lbs. Since your truck has a body lift that actually doesn't change the frame to axle clearance which is why you can use the standard SumoSprings for your application. Please note that suspension enhancement systems are meant to help support OEM suspension and won't increase the weight capacity of your vehicle.
    view full answer...
  • Recommended SumoSpring Fit for Motorhome on 2021 Ford F-550 Chassis
    The # SSF-111-40 SumoSpring Solo you'd looked at would be a great choice for the front suspension of your motorhome that's on a 2021 Ford F-550 chassis, and would offer 1000 lbs of support. For the rear suspension, you'll want to use the # SS54VR which offers 2800 lbs of additional support. In addition to extra support, the SumoSpring Solo helps keep the vehicle level, and minimizes sway.
    view full answer...
  • Recommended Front Suspension Enhancement For a 2022 Ford F-250 With Front Receiver Hitch
    I recommend adding the SumoSprings Solo Custom Helper Springs # SSF-111-40 to the front of your 2022 Ford F-250. Since you have the additional weight from the EcoHitch Hidden Front Mount Trailer Hitch Receiver # 306-X7904 and your Cargo Carrier # e98874 on your front suspension these springs will help to absorb the road shock you are experiencing. The springs have a capacity of 1,000lbs at 50% compression to help support the load. If you intend to use your front receiver with something...
    view full answer...
  • What Complete Air Bags Can I Control from the Cab of My 2021 Ford F-350 Super Duty with In-Bed Hitch
    Since you are transporting a fifth-wheel trailer, I assume you are looking for rear-axle air bags. We only carry Firestone-brand Ride Rite air bags that will work with 4-wheel drive models of 2021 Ford F-350 Super Duties with an in-bed hitch. That is the Firestone Rebel # F95FV. Apart from the 7,500-pound load-leveling weight capacity, the springs help prevent sagging while towing. They are also 100% made in the U.S.A. As far as compatibility, these air bags work with a fifth-wheel hitch...
    view full answer...
  • What Replacement Bump Stops Are Confirmed to Fit a 2024 Ford F-350 Super Duty?
    Here is a list of the bump stop replacements we have which fit your 2024 Ford F-350. If you can tell me how you plan to use your F-350 I can give you my personal recommendation for the option which works best for you. Timbren Front 2WD # TFF350SD2 4WD # TFF350SDC Timbren Rear 2WD/4WD # TFRTT350J SumoSprings Front 2WD/4WD 1,000LB # SSF-111-40 2WD/4WD 1,500LB # SSF-111-47 SumoSprings Rear 2WD/4WD 3,000LB # SSR-128-40-2 2WD/4WD 1,500LB # SSR-127-47 2WD/4WD 2,800LB # SSR-127-54 2WD/4WD...
    view full answer...
  • Recommended Suspension Enhancements To Improve Unloaded Ride Quality on 2006 Ford F-250
    I do have some recommendations to help improve your overall ride quality when driving unloaded, but I would not recommend the RoadActive Suspension # RAS3611 as it will add additional support to the springs when the truck is unloaded. Instead I recommend adding the Front # SSF-111-40 and Rear # SSR-114-47 SumoSprings to your 2006 Ford F-250. These are proportional springs which are designed to have a a small air gap or only just start to make contact when unloaded. That will help the truck...
    view full answer...
  • Front Suspension Enhancements for a Lifted 2015 Ford F-250
    I do have an option for you but the SumoSprings Solo Custom Helper Springs part # SSF-111-40 will not work as is if the contact point has changed as a result from the lift kit on your 2015 Ford F-250. The best options for you so long as you have the factory coil springs are with the Firestone Coil-Rite Air Helper Springs part # F4160 for 4x4 and part # F4101 for 4x2 or the Coil SumoSprings Custom Helper Springs part # CSS-1094F for 4x2. If you no longer have the factory coil springs then...
    view full answer...

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