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A heavy front load can make steering feel light and braking less confident. These SumoSprings Solo helper springs add up to 1,400 lbs of support at 50-percent compression to keep your ride level and controlled. The microcellular urethane material cushions bumps and helps your factory suspension handle extra weight without bottoming out, so your steering stays steady and your headlights stay aimed right where they should.
Whether you’re carrying a light load or something heavy up front, these springs adjust on their own. They compress easily for soft engagement when lightly loaded and can compress by as much as 80 percent to handle heavier weight. That progressive design smooths out bumps and road vibration while keeping the vehicle balanced across changing conditions.
When a curve or crosswind tries to push you around, each spring works independently to keep both sides planted. This helps reduce body roll and sway for a more stable, confident feel through corners or uneven approaches. The result is a ride that feels more controlled when the road gets unpredictable.
The closed-cell microcellular urethane is made to handle real use without wearing out fast. It resists oils, road salts, and UV rays, and performs in temperatures from -25 F to 200 F. The springs compress vertically with minimal side expansion so nearby parts stay protected even in tight spaces.
You can bolt these helper springs on without drilling or running lines or air hoses. With no air pressure to monitor and no maintenance needed, it’s a clean upgrade that’s ready to go once installed—just solid suspension support that works every time you hit the road.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Charles
4/14/2024
Good upgrade. Noticeably reduces rocking
Tr
6/5/2023
Great easy solution for loaded 4x4 170 Sprinter.
Lazer S.
10/21/2025
30 Minutes for all 4?! That's got to be some kind of record, Dennis! Glad the process was nice and easy and I hope they serve you well. Let us know if you do end up needing to go to the heavier duty yellow option as well, we always like to get real life experiences from people. : ) Any more trips planned for the year?
Claire H.
7/6/2026
That is awesome to hear! It must be such a relief to not have to put so much energy into controlling the wheel while driving now.
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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.