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Long Travel Rear Springs for Serious JKU Lift Applications
The Skyjacker SKYJKU40RDR rear coil spring set delivers a 4 inch long travel lift for the 2007-2018 Jeep Wrangler JK Unlimited (4 door, 4WD). Designed for owners running larger tires and heavier rear-end loads, this long travel spring set provides increased suspension travel and improved off-road articulation while supporting the added weight of rear bumpers, tire carriers, and other accessories. SKYJKU40RDR pairs with a complete Skyjacker long travel suspension system for maximum trail capability.
Key Features
- 4 inch long travel lift height
- Increased suspension articulation for off-road use
- Supports added weight from rear bumpers and accessories
- Engineered for JK Unlimited 4-door, 4WD models
- Pairs with complete Skyjacker long travel systems
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2007-2018 | Jeep | Wrangler | Unlimited |
Specifications
| Detail | Value |
|---|---|
| MPN | SKYJKU40RDR |
| Lift Height | 4 inch |
| Position | Rear |
| Application | Jeep Wrangler JK Unlimited 4WD |
What's Included
- Pair of SKYJKU40RDR rear long travel coil springs
About Skyjacker
Skyjacker Suspensions designs and manufactures lift kits, shocks, and springs for trucks, Jeeps, and SUVs, with decades of experience building off-road suspension systems for serious trail use and daily driving.
FAQ
What is the SKYJKU40RDR?The SKYJKU40RDR is a Skyjacker 4 inch long travel rear coil spring set for the 2007-2018 Jeep Wrangler JK Unlimited.
What lift height does SKYJKU40RDR provide?SKYJKU40RDR provides a 4 inch lift at the rear of the vehicle.
Is SKYJKU40RDR for the JK 2-door or 4-door?SKYJKU40RDR is designed specifically for the JK Unlimited 4-door model.
Does SKYJKU40RDR require a matching front spring set?SKYJKU40RDR is the rear spring set and is typically paired with a matching Skyjacker front long travel spring set for a complete lift.
What is long travel suspension?Long travel suspension increases the range of up and down wheel movement, improving off-road articulation and ride quality over rough terrain.
Can SKYJKU40RDR support a rear bumper and tire carrier?Yes, SKYJKU40RDR is engineered to support the added weight of rear bumpers, tire carriers, and similar accessories.
Does SKYJKU40RDR include shocks?No, SKYJKU40RDR is a spring set; shocks are sold separately as part of a complete Skyjacker lift system.
Is an alignment needed after installing SKYJKU40RDR?Yes, a wheel alignment is recommended after installing SKYJKU40RDR.
Install Instructions
- Raise and support the vehicle, remove the rear wheels
- Support the rear axle and remove the factory rear coil springs
- Install SKYJKU40RDR long travel rear coil springs in factory locations
- Reinstall sway bar links and any relocation brackets as needed
- Torque all hardware to factory specification
- Reinstall wheels and lower the vehicle
- Perform a wheel alignment
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