Rock Krawler JT45AXMP-TR 4.5 Inch Adventure-X PRO Mid-Arm Lift Kit Trail Runner System

The Rock Krawler JT45AXMP-TR is a 4.5-inch Adventure-X PRO Mid-Arm Suspension System with Trail Runner shocks, engineered as a complete, bolt-in lift solution delivering exceptional articulation and off-road performance without sacrificing on-road ride quality.

The "Adventure-X" designation reflects the inclusion of 8 fully adjustable control arms equipped with Rock Krawler's 100% service-free Adventure Series joints. These joints isolate road vibrations, offer high misalignment capability, and use a steel sleeve design that prevents bushing deformation under load — resulting in a long-lasting, maintenance-free joint that produces zero noise in the housing.

This kit earns its "PRO" designation through the rear bolt-in triangulated upper control arms. The triangulated 4-link rear assembly keeps the rear axle perfectly centered, allows removal of the rear track bar, and eliminates rear suspension bind and the cross-talk caused by the factory front-and-rear track bar arrangement — significantly smoothing highway ride quality.

Adventure-X mid-arms feature adjustable upper and lower control arms offering 70 degrees of total misalignment when paired with Rock Krawler Adventure Series joints at the frame and axle connection points. This extensive adjustability allows precise tuning of caster and pinion angle at all four corners.

Key Features:

• 4.5-inch lift height with complete bolt-in installation
• 8 fully adjustable control arms with 100% service-free Adventure Series joints
• Rear bolt-in triangulated upper control arms (PRO designation)
• Triangulated 4-link rear assembly — eliminates rear track bar and suspension bind
• 70 degrees of total misalignment capability at frame and axle connection points
• Triple-rate front coil springs for optimized ride compliance
• Quad-rate rear coil springs engineered for on-road comfort and off-road articulation
• Coils built to proper free-length for full off-road articulation and coil bucket retention
• Correction pads included to reduce factory spring bow
• Front track bar geometry correction hardware included
• Trail Runner shock package included
• All necessary hardware and detailed installation instructions included

Rock Krawler's coil spring technology uses triple-rate front and quad-rate rear coils that work together to deliver on-road comfort exceeding OEM springs while maintaining the proper free-length needed for maximum off-road articulation. Geometry correction pads and track bar corrections are included to perfectly center the axles and eliminate on-road handling compromise.

Rock Krawler hard parts are backed by an abuse-proof lifetime guarantee — all control arms, track bars, and mounting brackets will be replaced if bent, broken, or damaged in any way that affects function. Joint housings carry a 10-year warranty, and Rock Krawler provides lifetime technical support on all of their suspension systems.