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Rear SumoSprings are a maintenance-free suspension enhancement built to create a better journey. Handmade from micro-cellular polyurethane, they are designed to reduce rear-end sag and increase load carrying ability while decreasing vibration, stabilizing sway, and softening harsh rebounds. 

The SSR-121-54 has a 2,800 lb capacity when compressed at 50%. The Yellow SumoSprings shouldn’t be compressed past 55% of their original height in order to keep full memory rebound.

Benoit Gagnon-Hart
2022-12-21 12:44:04

Really satisfied by the quality and the design of your product. Complet installation as been done in 1 hours and a half without using any specialized tools. And the results is amazing. I drove a truck loaded with tools for a service company. This is exactly what my truck needed. Thanks again for your hard work and for your great service.

Rick Willis
2022-10-11 15:06:56

Installation was easy and straight forward. I really appreciated that everything was included- including the thread lock. Driving the van, it is noticeably more stable and much more controlled in corners. Not as susceptible to wind sway. Very pleased!

Steve Arr
2022-08-23 14:16:04

the difference these springs make is INCREDIBLE !!!

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Customer Reviews

3 ratings for the SSR-121-54
5 out of 5

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Product Specifications

Weight 6 lbs
Dimensions 10.75 × 7.25 × 4.5 in
Application(s) Summary

Ford Transit-150 4 X 2 (2015-2023) ; Ford Transit-250 4 X 2 (2015-2023) ; Ford Transit-350 4 X 2 (2015-2023) ; Ford Transit-350 HD 4 X 2 (2015-2023) ; Ford Transit-150 4 X 4 (2020-2023) ; Ford Transit-250 4 X 4 (2020-2023) ; Ford Transit-350 4 X 4 (2020-2023) ; Ford Transit-350 HD 4 X 4 (2020-2023)

Spring Diameter


Spring Height



2800 (lb) Capacity at 50% Compression