Rock Krawler JT30XF-TR 3.0 Inch X Factor Trail Runner Mid-Arm Coilover Suspension System

The Rock Krawler JT30XF-TR is a 3.0-inch X Factor Trail Runner Mid-Arm Suspension System featuring a full four-corner coilover configuration, engineered for complete bolt-in installation and maximum off-road articulation. Designed and manufactured in the USA, this system delivers the durability and performance that Rock Krawler suspension is known for — whether on the street or deep on the trail.

The Trail Runner configuration pairs RRD Racing Coilovers with Remote Reservoirs at all four corners, maximizing axle travel and off-road capability. Front and rear coilovers provide a fully tunable, race-inspired platform right out of the box.

At the heart of the system are Rock Krawler's X Factor Series adjustable control arms, which offer up to 90 degrees of total misalignment, significantly reducing the inherent bind found in factory JT control arms. This allows for precision tuning of caster and pinion angle both front and rear.

Rock Krawler's industry-leading Triple Rate coil springs deliver 3 inches of lift while providing superior on-road ride quality compared to the factory linear-rate springs. All four coils are engineered with the proper free-length for maximum off-road articulation, staying firmly seated in the coil bucket for a controlled response to rocks, sand, mud, and everything in between.

Included front and rear track bar geometry corrections ensure both axles are perfectly centered, preserving on-road handling and eliminating the side-to-side steering wander common with lifted vehicles. The kit also includes two rear spring seats and two front spring correction pads to reduce the spring bow inherent in the factory setup.

Key Features:

• 3.0 inches of lift — all lift heights based on Rubicon models
• Trail Runner System: RRD 2 5/8-inch Remote Reservoir Racing Coilovers front and rear
• X Factor Series adjustable lower control arms with 90 degrees total misalignment
• Industry-leading Triple Rate coil springs for improved on-road and off-road performance
• Front and rear track bar geometry correction brackets included
• Two rear spring seats and two front spring correction pads included
• Generic front shock range: 17.8 inches collapsed / 29.3 inches extended
• Generic rear shock range: 17.0 inches collapsed / 29.0 inches extended
• Complete bolt-in installation — no cutting or welding required
• Designed and manufactured in the USA

For maximum performance, a bump stop height of 3 inches is recommended. The Trail Runner coilover configuration is optimized for off-road performance and is not ideal for heavy towing or significant bed loading, as rear coilovers are sensitive to changes in loading conditions.