Springs
$280.00 – $365.00
The Jeep Gladiator is known for rock crawling, and now it’s time to expand capabilities on high-speed desert trails! Imgine taking your daily drive through a King of Hammers course and comfortably drive it back home – these springs make this a possibility!
Our spring kit allows for up to 18in* of rear wheel travel and 13in for the front while maintaining a great ride for all your daily driving needs.
Product Description
Front Spring:
21.5in free length, 155 lbs./in single rate, compressed height of 7.5, max shock extended length is 31.5in, comparable lift height of 3.5in on a JT Sport
Rear Spring:
26in free length, 125 lbs./in single rate, compressed height of 7.4 allowing for compressed shock length of 18.75in and an extended length of 32.31 inches. comparable lift height of 3in on a JT Sport
Additional Information
| Weight | 35 lbs |
|---|---|
| Dimensions | 28 × 14 × 7 in |
| Spring Type | Front, Rear |
*18 inches of rear wheel travel can be accomplished with the longest existing shocks from Fox, King, Falcon, and others. However, additional modifications are required, such as, but not limited to, sway bars, control arms, and triangulated upper control arms/axle cradle. Fundamental Motorsports makes no guarantee you will achieve 18 inches of rear wheel travel just by purchasing springs alone. Everyone builds their vehicle differently, and it is not realistic for us to try and account for every unique application.
A new solution to the desert and beyond!
The Gladiator is an awesome platform to build out and tackle any terrain, capturing your hunger for excitement and adventure. There are numerous lift kits out there, and we noticed most do not handle well on high-speed desert trails, whoops, and jumps. We decided to figure out how to achieve the best possible suspension performance without needing coil-over and bypass shocks on every corner. We started with the shocks that had the most piston travel and designed our springs from there.
The Rear
The shocks with the most piston travel allow the rear wheels to cycle 18 inches, which is awesome! However, the longest springs on the market were 2 inches too short and would unseat at full extension. At the same time, all the multi-rate springs that are available don’t allow for the full use of available up travel because the total coil height is about 10+ inches, and in testing our competition’s springs, we found the multi-rate approach does not work well for our goal. This also means that, at best, you were limited to 14 inches of travel for the rear. Well, what about those 4 other inches?!
The most you can compress (or stuff) the rear axle under a compressive load before the track bar mount hits the body results in a compressed spring height of about 8.25 inches, and that also translates to a compressed shock length of 18.75 inches. From here, we understood our core inputs to the design, but we also needed to keep in mind ride height and quality – all of which are affected by spring rate when bounded to spring min and max length conditions. After lots of testing and tuning, we concluded that (for the rear) 125 lbs./in met our goals and objectives of going fast in the desert.
The Front
When smashing through whoops and hitting jumps in the desert, your typical rock crawling springs are too soft, and the front end always gets stuffed into the dirt. We tested much higher spring rates, which made things significantly better, but were now too stiff for daily driving. After some more testing and development, we landed on a rate that allows for great daily driving and keeps the front end upright when at speed in the desert.
Together
With new solutions for both the front and, more importantly, the rear, we took on the NORRA 1000 Mexican Rally to put our designs to the test. This race was completed in April 2024 and covered 1300 miles of Mexican terrain, starting in Ensenada and going all the way down to San Jose Del Cabo – and then driving it back home! (We don’t trailer our development rig!). These springs kicked ass in the desert, provided better than expected flex in the rocks, and rode smooth all the way home. Sure, we broke some other components, but that is only because our suspension was not the limiting factor while giving all the Raptors a run for their money!