Rock Krawler JT30PX-B51 3.0-Inch Pro-X Mid-Arm Suspension Lift Kit with 5.5 Big Bore Shocks

The Rock Krawler JT30PX-B51 3.0" Pro-X Mid-Arm Suspension System is a complete, bolt-in lift solution engineered for the Jeep Gladiator JT platform. This kit delivers 3 inches of lift and pairs the proven Pro-X mid-arm architecture with Rock Krawler's 5.5" Big Bore 1 (B51) shocks for enhanced damping performance both on and off the trail.

At the heart of the system is Rock Krawler's triangulated 4-link rear assembly, which keeps the rear axle perfectly centered, eliminates the need for a rear track bar, removes rear suspension bind, and reduces the cross-talk between front and rear track bar geometry — resulting in a noticeably smoother highway ride.

The X-Factor Series adjustable control arms are fully integrated throughout, offering up to 90 degrees of total misalignment, allowing precise tuning of caster and pinion angle at all four corners. Front track bar geometry corrections are included to maintain proper axle centering after the lift.

Key Features:

• 3.0" lift for the Jeep Gladiator JT platform
• Bolt-in installation — no cutting or welding required
• 5.5" Big Bore 1 (B51) shocks front and rear for superior damping
• Triangulated bolt-in rear axle cradle eliminates rear track bar
• X-Factor Series adjustable upper and lower control arms — up to 90° misalignment
• Triple-rate front coil springs and quad-rate rear coil springs
• Adjustable front track bar for proper axle centering
• Spring correction seats to reduce factory spring bow
• Front and extended rear sway bar links included
• Supports up to 37"–40" tires depending on trim level and fender configuration
• Designed and manufactured in the USA

The Pro-X system's triple-rate front coils and quad-rate rear coils work in concert to deliver on-road comfort that rivals or exceeds factory ride quality, while still providing the articulation and ground clearance demanded by serious off-road use. Whether towing, street driving, or crawling, the JT30PX-B51 is a comprehensive suspension solution for the Gladiator.