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Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride.
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Average Customer Rating: 4.7 out of 5 stars (45 Customer Reviews)
Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride.Installation was very straightforward and they made a significant difference in pulling.
Tom - 02/28/2022The only reason I can't give a 5 star is that we haven't taken the trailer out yet to test the sumo's. From the install point of view, they were great! easy to follow instructions and assembly. My only suggestion comes from my own mistake. Maybe consider adding an additional line to your step 1. "Ensure the landing gear / jacks / stabilizers are retracted before taking measurements". I had measured and installed two sumo's before I realized the gears were still down which, obviously, messed up my measurements. Thus I had to take off the sumo's, hook up the 5th wheel, raise the jacks, then restart the process. Went smooth after that. My daughter installed one with no problem. Thanks.
Tom - 04/14/2022These were very easy to installed and have done a great job smoothing out the ride of the camper. It has made a big difference in how the camper tows and has calmed it down with crosswinds and when big trucks pass by. We did not have the clearance to install a shock kit and the tech at etrailer highly recommended these, I am glad he did. So far I am very happy with this product.
Dale - 07/25/2020Simple call to identify part number needed, Fast delivery, Clear instructions, Extremely easy install.
Greg S - 02/27/2021Kit came with more than I needed but I can see where some trailers might have used different hardware and all scenarios were included in kit. I went with these to help eliminate my tires rubbing against bottom of trailer floor on rough roads "California" and give an overall smoother ride hopefully extending the lifespan of our trailer. I also Installed Dexter EZ Flex at the same time.
They were easy to install and definitely made our 5th wheel handle better. I would have gave them a 5 start but I stumbled into the perfect 5th wheel for me and traded my old one off, so I don't have any long term information.
One year in already? Wow time flies! These sumo springs have been a GREAT addition to our 32' travel trailer. Easy to install and they've been perfect ever since. I definitely recommend these!
When I decided to replace the RV trailer leaf springs I decided to update the suspension by adding Sumo Springs as well. The installation was simple and quick. Between etrailer.com and Sumo Springs websites all the information is available for the do it your-selfer. Thanks etrailer.com for shipping to Canada. I will continue to support your company.
Trailer is more stable with the sumo springs, easy to install great product.
Received the SumoSprings a day early. The installation on 5th wheel was quick and easy with the provided instructions and Etrailer video. Called to ask if it was ok to use one spacer on rear axle and 2 on front to get correct loading on SumoSprings on both axles and tech said no problem. Can't wait to try it out! I'm confident it will help the highway bounce.
Although product was on back order etrailer kept me well informed on order progress which was appreciated. Seems to be a great product,untested at this time. Very easy installation ,hoping for the best.
Terry - 02/21/2021No room for the Lippert shock kit (outboard side) so I went with the Sumo Springs. Easy install. The way the kit hugs the frame, there has to be improvement in the rocking from side to side.
Wow, these things make the trailer so much smoother! Great service from Etrailer, as Always!
Was easy to install I removed the wheels which made it easy to access the u bolt flange that they mount to I moved the propane line further away from the area, took about an hour to complete install which included greasing the spring mounts.
these went on so quickly. We took the trailer for a short drive around town and it felt like driving a new car. Increased stability. Hands down this add on is the cats pajamas. Thumbs up,thanks you much.
Great add on to our travel trailer suspension to assist in the ride of our leaf spring suspension. We also have MORryde 3000, HD shackle wet bolts , and X-factor crossmembers on our trailer as well. All of the above makes for a great towing experience as we tow our rig between 10 and 15k miles a year from upstate NY to the Rockies as well as traveling the Adirondack mountains and New England with plans for Alaska after COVID. Another great add are the Goodyear Endurance tires on our trailers....fantastic tires! We have a tpms for our trailer tires and I check tire temperature every 2 to 4 hours of travel With an infrared thermometer.... safe travels!
Tammie I want to thank you for the personnel attention you gave to my order. The springs came faster then I expected. I just got off the phone with a good friend of mine that just received his Sumosprings from etrailer yesterday. We are both long time customers of etrailer and are extremely happy with your products and service. I always tell fellow RV'ers. about your company and hopefully they will buy from you. The company is lucky to have a dedicated and considerate salesperson like you on their staff. Will start the install today. Thanks again.
etrailer has delivered again. Great company for your RV parts. Looking forward to next trip to see how Suspension Upgrade works, but took trailer for short 10 mile test pull, & so far I think I'm going to be impressed.
Fast delivery, simple and quick install. Have not taken 5th wheel out to test. Will follow up later.
easy install works great very well label and instructions. fast shipping
Short of installing independent suspension or adding shock absorbers (did this on my 2014 radiance, DIY project, lots of upside down drilling) this is the upgrade for you. Installation and directions are straight forward and only took me about an hour to install. Due to the COVID, we were only able to take four trips since we purchased our 2020 Grand Design 303RLS and these helper springs have made a WORLD of difference. The side to side motion is less and the ride is MUCH smoother. Also changed out our fifth king pin which helped with the chucking. Highly recommend these helper springs and as a bonus, dealing with etrailer is a great experience and they are always there to help and support. Customer service is Top Notch.
Best addition ever to my trailer wish I had had them 2 sets of springs ago
I received exactly what was promised in a well packaged box with all the small parts separately packaged. Installation of the SumoSprings was easy and straight forward though I did need additional spacers that etrailer had available. The most time consuming and difficult part of installing the SumoSprings was moving the gas line, which parts came with the kit to help with, that ran on the trailer frame where the SumoSpring makes contact. Definitely recommend.
These springs, combined with the Dexter EZ Flex equalizer system, and heavy duty shackles, made a huge difference in the amount of trailer bounce I experienced in towing a 34' travel trailer. The entire rig is much more stable and under control. Towing went from scary to mildly pleasant.
Just installed 2 sets. The included spacers definitely helped address the variable spacing between the 4 axle points and the frame. Had to relocate both gas line (for which brackets were included) and a grey water line (no brackets included). I only give 4 starts for now because the replacement clamps for the gas line do not come with the correct hardware to attach to accompanying bracket. The clamps holes are way too big for the screw that is included. I had to use the old clamps, which is fine. Also, only got one drop of thread lock out of the included tube - too viscous / dried up otherwise. I'll test the ride this weekend.
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