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🧾 Overview
The Rock Krawler 3.5" Adventure Series Mid Arm Lift Kit for the 2018–Present Jeep Wrangler JLU Diesel is designed for owners who want a true bolt-on system that delivers excellent on-road manners with proven off-road durability. This system focuses on maintaining ride quality while improving articulation, axle centering, and overall suspension performance.
Built around Rock Krawler’s service-free control arm joint technology and triple-rate coil springs, this kit provides 3.5 inches of lift with improved spring control and reduced bind compared to factory components. Geometry correction is addressed front and rear to ensure predictable handling and a level stance on all four corners.
✔ Complete bolt-in suspension system
✔ Excellent highway ride with improved off-road capability
✔ Triple-rate coil springs for comfort and control
✔ Service-free control arm joints reduce maintenance
✔ Designed to keep the Jeep level front to rear
🛠 Installation
- Complete bolt-in installation designed to use factory mounting locations. No cutting or welding required. Designed for staged upgrades and compatible with future long-arm conversions. Professional installation and alignment are strongly recommended.
📌 Specs
- Key Features & Benefits
- Triple-rate coil springs improve ride quality over factory linear-rate springs
- Service-free control arm joints provide durability with reduced maintenance
- Fixed lower control arms offer up to 70 degrees of misalignment
- Front and rear geometry correction centers axles for proper handling
- Spring leveling pads reduce factory spring bow
- Upgradeable to Rock Krawler JL long arm systems
- Lifetime warranty on all hard parts
📘 Specifications
- Brand: Rock Krawler Suspension
- System Type: Adventure Series Mid Arm Lift Kit
- Lift Height: 3.5 inches
- Vehicle Platform: Jeep Wrangler Unlimited JLU (Diesel)
- Control Arms: Fixed lower control arms
- Installation Type: Bolt-on
- Warranty: Lifetime (hard parts)
- Tire Fitment (Reference Only):
- Sport / Sahara with Full OEM Fenders
- 37" tires (3" bump stop height recommended)
- Sport / Sahara with Trimmed or High-Lined OEM Fenders
- 38" tires (3" bump stop height recommended)
- Rubicon with Full OEM Fenders
- 37"–38" tires (3" bump stop height recommended)
- Rubicon with Trimmed or High-Lined OEM Fenders
- 40" tires (3" bump stop height recommended)
- Wheel Fitment (Reference Only):
- Sport / Sahara
- 37"–38" tires – 3.5" backspacing recommended
- Rubicon
- 37" tires – 4.5" backspacing recommended
- 40" tires – 3.5" backspacing recommended
📦 What’s Included (What’s in the Box)
- (4) Triple-rate coil springs
- (2) Front set-length lower control arms
- (2) Front spring leveling pads
- (1) Adjustable front track bar
- (2) Rear spring leveling pads
- (2) Set-length rear sway bar links
- (1) Bolt-on rear track bar relocation bracket
🛡 Warranty
- Lifetime manufacturer warranty on all hard parts, provided by Rock Krawler Suspension.
⚠️ Fitment Notes
- Jeep Wrangler Unlimited JLU (Diesel)
- 2018–Present Jeep Wrangler JLU Diesel
⚠️ Fitment Notes
- Lift height is based on Rubicon models with a standard build (front bumper and winch, rear bumper, full-size spare). XR package vehicles already feature a raised rear track bar bracket; systems without a rear track bar must add one. Vehicles with spare tire deletes may require reduced rear coil height, while heavily loaded or overland builds may require increased rear coil height. Professional installation and alignment are recommended.