Rock Krawler 3.5" Adventure Mid-Arm Suspension System for 18-26 Jeep Wrangler JL Unlimitd 4-Door Sport/Sahara
Optimized for 37"–38" Tires: This 3.5-inch height is widely considered the "sweet spot" for the JLU, providing enough room for massive tires to flex into the wheel wells without requiring extensive body trimming or sacrificing daily usability.
Solid Steel "Abuse It" Construction: Rock Krawler is famous for using solid alloy steel for their control arms and track bars rather than hollow tubing. This makes the components nearly indestructible against rock strikes, backed by their legendary lifetime warranty on hard parts.
Maintenance-Free Adventure Joints: The system features specialized bushings that provide the high-degree of rotation needed for off-road crawling but require zero greasing. This makes it an ideal "set it and forget it" upgrade for owners who don't want to spend their weekends under the Jeep with a grease gun.
Improved On-Road Geometry: By using adjustable mid-arms, you can perfectly dial in your caster and pinion angles. This corrects the steering geometry back to factory (or better) specs, significantly reducing the risk of "death wobble" and improving straight-line tracking at 70 mph.
Many states have laws that limit the maximum height of a lifted vehicle. Never exceed the legal height limit.
The Rock Krawler 3.5" Adventure Mid-Arm System for the Jeep Wrangler JLU (4-Door) is designed to provide a significant increase in ground clearance while maintaining the stability needed for a longer wheelbase vehicle. By lifting the chassis 3.5 inches, this system allows JLU owners to easily run 37-inch or even 38-inch tires, provided they use the correct bump stop spacing. The mid-arm geometry is specifically tuned to correct the roll center and center of gravity, ensuring that the 4-door Wrangler feels planted during high-speed cornering on the pavement and remains predictable when articulated over technical rock sections.
Unlike basic lift kits that only provide height, this Adventure series focuses on ride quality through the use of multi-rate coil springs and high-quality bushings. The triple-rate front and rear springs are engineered to support the extra weight of overland gear, steel bumpers, and winches without sagging or feeling "spongy." Additionally, the kit includes an adjustable heavy-duty front track bar made from solid steel, which is essential for re-centering the axle under the frame and eliminating the "flighty" steering feel that often plagues lifted Jeeps on the highway.
- (4) Triple-rate Coil Springs
- (2) Front Set-length Lower Control Arms
- (2) Front Spring Pads
- (1) Adjustable Front Track Bar
- (2) Rear Spring Pads
- (2) Set-length Rear Sway Bar Links
- (1) Bolt-on Rear Track Bar Relocation Bracket
Jeep Wrangler Unlimited 4-Door (JL)
- 2026 Jeep Wrangler Unlimited 4-Door (JL)
- 2025 Jeep Wrangler Unlimited 4-Door (JL)
- 2024 Jeep Wrangler Unlimited 4-Door (JL)
- 2023 Jeep Wrangler Unlimited 4-Door (JL)
- 2022 Jeep Wrangler Unlimited 4-Door (JL)
- 2021 Jeep Wrangler Unlimited 4-Door (JL)
- 2020 Jeep Wrangler Unlimited 4-Door (JL)
- 2019 Jeep Wrangler Unlimited 4-Door (JL)
- 2018 Jeep Wrangler Unlimited 4-Door (JL)
Rock Krawler 3.5" Adventure Mid-Arm Suspension System Options
| Part Number | Catalog # | Shock Options | Engine Options | Price | |||||
|---|---|---|---|---|---|---|---|---|---|
| JL35AS-4 | 16189-4436 | without Shocks | 2.0/3.6L Engine | $1,349.66 | |||||
| JL35AS-4S1 | 16189-4438 | with RRD 2.25" IFP Shocks | 2.0/3.6L Engine | $2,506.58 | |||||
| JL35AS-4D | 16189-4497 | without Shocks | 3.0L Diesel Engine | $1,397.16 | |||||
| JL35AS-4DS1 | 16189-4499 | with RRD 2.25" IFP Shocks | 3.0L Diesel Engine | $2,554.08 |
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