Rock Krawler JL45AX2LA-4TR 4.5 Inch Adventure-X2 Trail Runner Long Arm Suspension System

The Rock Krawler JL45AX2LA-4TR is a 4.5-inch Adventure-X2 Trail Runner Long Arm Suspension System engineered to bridge the gap between a capable daily driver and a serious off-road performer. Designed and manufactured in the United States, this complete long arm lift system delivers 4.5 inches of lift while dramatically improving suspension geometry, articulation, and ground clearance over the stock setup.

At the heart of this system is the Adventure-X2 suspension architecture, which pairs a full high-clearance 4-link long arm front suspension with a high-clearance independent 3-link rear suspension. The X2 rear suspension geometry features enhanced rear instant centers and rear roll centers, resulting in one of the smoothest-riding 3-link setups available for the JL platform. Front and rear 2.625-inch coil-overs are included, providing a trail-ready, tuned damping package straight out of the box.

The high-clearance X2 axle bracket system delivers 4.5 inches of additional ground clearance under the rear axle compared to stock, while the rear upper shock relocation brackets preserve full shock and suspension travel. Rock Krawler's service-free long arm joint technology eliminates the need for greasing — the joint sleeve is engineered to absorb clamping force so the bushing remains uncompressed, resulting in a long-lasting, noise-free connection.

Key Features:

• 4.5-inch lift with front and rear 2.625-inch coil-overs included
• Full high-clearance 4-link long arm front suspension
• High-clearance independent 3-link rear long arm suspension
• X2 rear suspension geometry with enhanced instant and roll centers
• 4.5-inch rear axle ground clearance gain over stock
• Service-free, maintenance-free long arm joint system — no greasing required
• Rear upper shock relocation brackets to preserve full suspension travel
• Weld-on rear upper shock mounts, axle-side control arm mounts, rear track bar mount, and rear axle truss
• Rear brake line relocation brackets included
• All necessary hardware and detailed instructions included
• Designed and manufactured in the USA

Warranty: Rock Krawler hard parts — including all control arms, track bars, and mounting brackets — are backed by an Abuse Proof Lifetime Guarantee covering replacement if bent, broken, or damaged in any way that affects function. Joint housings carry a 10-year warranty. Springs and shocks are warrantied against manufacturer defects.

Installation Notes: Requires removal of the OEM shock mount from the frame and the OEM shock/spring mount from the axle. Welding of the new coil-over mount on the axle is required. Installing limiting straps after final setup is strongly recommended to prevent over-extension of suspension components.