Product Description
Synergy MFG Jeep JT Multi-Rate Rear Lift Coil Springs. Synergy MFG has designed these springs from a clean sheet for the new Gladiator platform. All springs are multi-rate and have been designed to make a great platform even better. These springs are unique to the JT and not shared with any other vehicles. Multi-rate design has a soft initial rate which prevents the spring from coming loose, even with long travel shocks. The ride rate is the average of the OEM spring rates to maintain adequate payload and towing capacity. Springs are proudly manufactured in the United States of the highest quality steel. Springs are designed to be able to set solid (fully collapse) without overstressing the material and are pre-set from the factory meaning the springs will never sag or set.
Benefits:
- Increased ride quality
- Increased wheel travel/articulation/traction
- No spring bowing
- Lifetime warranty/guarantee against sagging and breakage
Features:
- Multi-Rate coil springs allow for longer spring lengths and increased travel
- Spring rates are similar to stock to maintain payload and towing capacity
- Coil spring block heights designed around common bump stop spacings to optimize wheel travel
- Frequency balanced and tuned spring rates to maximize suspension performance on and off road
- Abrasion-resistant black powder coat finish for maximum durability and corrosion resistance
- Sold in pairs
Notes:
- Coil springs require proper bump stop spacing with Synergy 8057-10 Bump Stop Spacers.
- Lift heights are based off fully optioned Rubicon models. Other models will see more lift.
- Coil springs retain the stock rake of the vehicle.
- Up to .75 inch of front coil spring spacer can be added to level the vehicle using 8017-075 front coil spring spacers.
- Minimum bump stop spacing listed is the minimum amount of bump stop spacing required to prevent the springs from going into coil bind. Do not use less bump stop spacing.
Tables (lift heights and proper bump stop requirements)
| Part # | Lift Height | Spring Rate (Initial/Ride Rate) | Collapsed Length | Extended Length | Min. Bump Stop Spacing |
| 8865-20 | 2” | 165/250 lb/in | 7.89” | 20.375” | 2” |
| 8865-30 | 3” | 165/250 lb/in | 7.89” | 21.375” | 2” |
| 8865-40 | 4” | 165/250 lb/in | 9.46” | 22.375” | 2” |
Additional Information:
Like most other high-end long travel coil springs on the market, we take advantage of using multiple spring rates to increase the extended travel of the spring. Gone are the days where coil spring retainers are required to keep your springs from falling out on the trail. From our experience, there is a lot of misunderstanding on how multi-rate coil springs work, and why they would be preferred over linear-rate coil springs and vice-versa. In short, it depends on the application and what constraints we are working with. With the new JT platform we were able to design a dual-rate coil spring with a softer initial rate that is used at unloaded ride height. As the vehicle is loaded the spring rate increases to minimize sag and maintain payload capacity.
Our spring rates were kept similar to the stock Gladiator spring rates in order to maximize flex and traction off road in addition to allowing us to maintain a payload and towing capacity similar to stock.
Due to variances between Jeeps and how they are used, we designed these springs to match the stock rake of a fully optioned Rubicon. If you want the vehicle to sit level (without the stock rake) when unloaded, our front coil springs will accommodate up to a .75 inch front coil spacer without requiring additional bump stop spacing (8017-075). This means that the ride height and rake of the Jeep can be fine-tuned in order to get the perfect ride height without compromise.
Synergy MFG Jeep JT rear coil springs have very long free (extended) lengths. Due to this fact, we generally recommend that the end user make sure they are using the correct shocks in order to maximize available wheel travel. Our shortest springs will allow for around 12 inches of wheel travel front and rear. Taller springs will allow for more wheel travel. Generally, aftermarket shocks are spec’d short in order to prevent typical coil springs from falling out. We recommend at least one length longer shock for a given lift height (For example: use a 3.5-4 inch lift Fox shock with our 2 inch springs). Make sure the shock mounts and bump stops are setup to prevent the shock from bottoming out before the bump stops do.
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DETAILED FITMENT:
- 1962-1969-Jeep-Gladiator-
- 2020-2020-Jeep-Gladiator-Launch Edition
- 2020-2020-Jeep-Gladiator-Mojave
- 2020-2021-Jeep-Gladiator-Overland
- 2020-2021-Jeep-Gladiator-Rubicon
- 2020-2021-Jeep-Gladiator-Sport
- 2020-2021-Jeep-Gladiator-Sport S
Enhance your Jeep JT Gladiator's performance with the Synergy 8865-20 Rear 2.0 Inch Lift Coil Springs, designed to deliver superior ride quality and increased traction on and off the road.
Crafted exclusively for the Jeep JT Gladiator from high-quality US steel, these multi-rate rear lift coil springs significantly improve your vehicle's suspension capabilities while maintaining the ride's balance. The unique multi-rate design provides a soft initial spring rate to prevent loosening during use, especially with long travel shocks. Experience the perfect blend of comfort and performance during your outdoor adventures.
- Increases ride quality for a smoother driving experience.
- Enhanced wheel travel, articulation, and traction on rugged terrains.
- No spring bowing, ensuring stability and durability.
- Bumper-to-bumper lifetime warranty against sagging and breakage.
- Multi-rate design allowing for longer spring lengths and optimal travel.
- Spring rates maintain stock performance, ensuring payload and towing capacity.
- Coil spring block heights optimized for common bump stop spacings.
- Frequency-balanced spring rates for maximized suspension performance.
- Abrasion-resistant black powder coat finish for superior durability.
- Available in pairs for ease of installation.
Transform your Jeep Gladiator into the ultimate off-road machine with the Synergy 8865-20 Rear Lift Coil Springs. Elevate your experience today and conquer any terrain with confidence.