A Taller Triple Rate Rear Lift Built for Bigger Tires and Heavier Builds
The RK02002P rear coil spring set gives the four door Jeep Wrangler JKU a 3.5 inch rear lift using Rock Krawler’s triple rate coil design. Three progressive spring rates work together to maximize suspension travel and resist unseating at full droop, while still delivering a controlled ride on the street. RK02002P is a direct bolt-in replacement for the factory rear coils and is a popular choice for JKU builds running larger tires and rear bumpers.
Key Features
- 3.5 inch rear lift, suited to four door JKU builds with larger tires and rear armor
- Triple rate spring design for extended travel and reduced unseating at full droop
- Improved ground clearance and off-road ability
- Excellent on-road ride quality compared to single-rate aftermarket springs
- Black powder coat finish for corrosion resistance
- Sold as a pair, engineered specifically for the rear axle
- RK02002P pairs with the RK02659 rear coil correction wedges if not already installed
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2007-2018 | Jeep | Wrangler |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | RK02002P |
| Location | Rear |
| Lift Height | 3.5 inches |
| Coil Height | 18.5 inches |
| Spring Type | Triple rate |
| Quantity | 2 springs per pair |
| Finish | Black powder coat |
| Warranty | 5-year warranty against fracture |
What’s Included
- (2) RK02002P JKU rear coil springs
About Rock Krawler
Rock Krawler has manufactured USA made Jeep suspension components for decades, developing triple rate coil technology proven in King of the Hammers competition. RK02002P applies that same triple rate coil engineering to JKU owners who want a taller 3.5 inch rear lift.
Related Parts on Our Site
- Rock Krawler 07-18 Jeep Wrangler JK/JKU High Clearance Adj. Rear Lower Control Arms
- Rock Krawler 07-18 Jeep Wrangler JK/JKU 1.5-3.5in Lift Rear Adjustable Track Bar
- Rock Krawler 07-18 Jeep Wrangler JK/JKU Double Adjustable Rear Upper Control Arms
FAQ
What is the RK02002P?
The RK02002P is a Rock Krawler triple rate rear coil spring set for the 2007-2018 Jeep Wrangler JKU that provides a 3.5 inch rear lift. It is sold as a pair and bolts into the factory rear coil location.
What is the difference between RK02002P and RK03101P?
RK02002P provides a taller 3.5 inch rear lift while RK03101P provides a 2.5 inch rear lift. Both use the same triple rate coil design but differ in free length and spring rate progression.
Does RK02002P fit the two door JK Wrangler?
RK02002P is calibrated for the four door JKU. Two door JK Wranglers running a comparable ride height typically use a different part number due to the shorter wheelbase and weight distribution.
Do I need correction wedges with RK02002P?
If your JKU does not already have rear coil correction wedges installed, Rock Krawler recommends adding part RK02659 alongside RK02002P for proper spring seating.
What does triple rate mean for RK02002P?
Triple rate means RK02002P combines three distinct spring rate zones in one coil, giving a soft initial rate for ride comfort, a middle rate for handling, and a firm rate to resist bottoming out.
What is the warranty on RK02002P?
RK02002P carries Rock Krawler’s 5-year warranty against fracture when properly installed, with a receipt and installation photos kept on file.
Is RK02002P made in the USA?
Yes, RK02002P is manufactured in the USA as part of Rock Krawler’s domestic coil spring production.
Is RK02002P a good match for larger tires?
Yes, the 3.5 inch lift of RK02002P is commonly paired with 35 to 37 inch tire setups on JKU builds that need the extra clearance.
Can RK02002P be installed without a spring compressor?
A spring compressor or shop press makes installation of RK02002P significantly safer and easier, though experienced installers can complete the swap with careful axle support alone.
Install Instructions
- Park the Wrangler on level ground, chock the front wheels, and raise the rear end on a jack and jack stands.
- Remove the rear wheels and support the rear axle with a floor jack to control its descent.
- Disconnect the rear sway bar end links and track bar to allow the axle to drop freely.
- Lower the rear axle slowly and remove the factory or existing rear coil springs.
- Install the RK02002P coil springs into the coil buckets, adding correction wedges if needed.
- Raise the axle back into position and reconnect the track bar and sway bar end links.
- Reinstall the wheels and torque all suspension hardware to factory specifications.
- Recheck ride height and re-torque all fasteners after 100 miles of driving.
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