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When you’ve got extra weight up front like a plow, winch, or heavy gear, the front suspension can sag and ride harsh. The Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Front Axle fit between the coils to add cushioning and support. Their microcellular polyurethane foam core adjusts progressively—the more load you add, the stiffer they become—so your ride stays level and controlled even with heavy front loads.
These wedge-shaped helper springs sit between each coil loop to absorb shock and vibration that would otherwise travel straight through the suspension. The extra cushioning helps reduce driver fatigue on long days behind the wheel and takes out some of the harshness that comes when your stock coils are compressed tight under weight.
Loaded or not, these helper springs reduce body roll and help level your truck for more stable handling. By giving your front end extra support, steering feels tighter and more predictable when cornering, braking, or driving through uneven terrain.
Each doughnut-shaped insert features H-shaped channels that slip over the rungs of your coil springs. They install easily without special tools and require no maintenance once in place. Designed to work with a suspension system that’s in good condition, they enhance support without increasing your vehicle’s weight-carrying capacity.
Customer Satisfaction Score:
85% were satisfied with this product
15% of customers were not satisfied
Ratings & Reviews
Install was a breeze, and the ride is a lot better, can’t wait to put some weight in it
Easy to install and greatly increases the stability and ride of our Ram 3500 van
Unbelievably easy to install with instant positive feedback. I tow a 9,000 travel trailer using a weight distribution hitch along with added Sumo Springs rear suspension upgrade. Feels like I'm towing with a 1 ton dually.
I cannot recommend these products enough!
I did not remove the front tire as I add more than enough room to slide them in. Quick and easy install. The front did not need to be trimmed.
Actually used these on the rear coil overs on our 2008 expedition for a little extra help while pulling our camper. Definitely helped level things out. Simple and great product.
10 minute install significant improveme nt
Install went fairly easy once I figured out the best spot to put the jack to lift the van. Really helped to have an oil filter wrench to get the old springs off the back. Took it out for a drive after an much better cornering and much less effect from wind and 18-wheelers. This was on a fairly windy day. No big difference in softness of the ride.
As advertised! Our van should have come from the factory with these!
I was very excited about these for my 4x4 2015 Nissan Frontier. I am not completely displeased with them because they do make a mild difference over bumps, but they aren't worth over 100 bucks no way, the fact that I had to CUT THEM to fit due to them being too long made me feel like the company does not due their research when manufacturing them. It was so long that it lapped the beginning on it, so in order to have them installed as shown on the instructions I had to cut nearly 3 inches off... Which meant I had to comely install them, mark then uninstall, cut to fit, then install again. For an item to cost this much I expected better build quality.
Bang for buck it's not worth it, it's overpriced and I wouldn't recommend them for that cost.
For right now it works
I am working with a 2025 Pleasure Way nature 2.2 class B on the Ford Transit chasis. We were experiencing a very rough ride in our RV. Pleasure Way had already installed the SuperSprings helper springs on the back leaf springs. This RV is rated for 11,000 pounds gross weight. We are currently almost 900 pounds below that weight fully loaded. This is probably as heavy as we ever will be loaded and about as light as we will ever weigh.l
I installed the SSR-121-47 SuperSprings in the back to reduce the jumping and slamming we were experiencing while driving and hitting rough spots, potholes and open joints at bridge junctions on the highway. I had to remove the back dually wheels to have adequate access to remove the original bump stops and install these springs.
Next, I installed the Coil SumoSprings CSS-1195 on the front coil springs per instructions. These were easy to install and we finished installing these coil helper springs in about 25 minutes including the setup time to gather the jacks, jack stands, soapy water, etc..
RESULTS:
My wife and I then took a ride to test the results and Oh My!!! What a difference. The jumping and hard slamming in the back suspension smoothed out and became as docile as our Lexus RX 350 car. I took my brother and nephew on a ride before I ordered the SuperSprings for the front and back and my nephew who sat in the back of my RV said the suspension action almost tossed him off the sofa when hitting small defects in the road.
The van tracked so much better. It had been moving left to right even when there was no wind. It was flat in corners and the steering felt firm, not soft and mushy like before. It was so back that the van would drift to the third land when I changed lanes. My wife is so happy. The cab is so much quieter and it is easier for us to have a conversation now. Before, we had to be facing one another and shout to each other in order to be heard.
I had considered upgrading the front struts and back shocks and adding a steering stabilizer to correct the wandering all over the road. The van was hard to handle in speeds above 60 MPH from new to now, 3,700 miles on the van.
We are very happy. We installed upgraded bump stops on our 2019 Sprinter chasis for our 2021 Dynamax Isata 3 24FW and got similar results.
I strongly recommend these products for the Ford Transit 350 HD to provide a more comfortable, controlled ride and reduce white knuckle driving!
I ordered these for my RAM Promaster 3500 because I had heard from fellow owners that they are a worthwhile addition, for increased stability on the road. The instructions are good, and they weren’t too hard to install myself. They are kind of expensive for a couple of rings of dense foam/plastic, but I guess they must be petty heavy duty. I look forward to my next trip to see how they perform.
Total upgrade in ride and stability. 100% best upgrade to promaster
Excellent work great stiffness up just enough it was a great that it showed that stronger spring are needed I rather sent 250 before I spent 1 thousand on front struts gives me a little time to save up …
Installed these sumo spring spacers in our 2023 Promaster/ Roadtrek conversion van three weeks ago and just returned from a two week 2000 mile road trip with my wife. These spring spacers made an unbelievable improvement in general handling and highway speed handling around semi's, on and off ramps stability, cornering at intersections and dealing with crosswind conditions on the road. They were less and a $200 investment and they were great decision. While they were a little hard to insert into the springs, after watching several installation videos and soaping them up good after lifting each corner of the van, I was able to get them inserted in the springs and adjust them on the coil to where I wanted them at mid coil height. Great product!
I used these to stiffen the suspension on a ‘21 Sedona. They work great and are easy to install.
Shipping was fast and packaged well. The material looks and feels durable and easy to install but is a little loose on the springs, and not as snug as I thought. Although once I did a test drive around the neighborhood it tighten itself on the coil springs and hope it stays that way!
I put these on all four wheels of my small SUV. Previously when it was loaded up for Overlanding and camping trips if I hit a bump or dip,it would bottom out on the shocks. Now they perform really well in those situations. When the car is not loaded up with gear, it performs as it would without the sumo springs. The ride is not stiff. Occasionally, I hear squeaking of the plastic material when the wheels articulate low speed on steep angles as it rubs against the shocks. After a year of use, I am glad I installed these overload devices. I think they have greatly extended the load range of my vehicle and the durability of the shock absorbers.
Went on a little hard but once started not to bad. Haven't tried yet to tow with them.
Bought these for the front of my 2019 Honda Ridgeline. They did not fit at all, too small. However they went on the back ok so that’s where they are. Ordered another pair for the front. Fit them with another on line service. Hope they fit.
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Brent O.
3/20/2024
After a year of use no complaints here. Great product and highly recommended!