Description
Upgrade your Jeep JK Wrangler or JKU Unlimited with the RockJock Sport Edition Johnny Joint Suspension System, a high-performance suspension lift kit engineered to deliver approximately 4 inches of lift and clearance for up to 37-inch tires (larger tire fitment may require aftermarket fenders and minor trimming). This Jeep JK suspension upgrade is designed to improve off-road capability, ground clearance, and overall vehicle performance for drivers who want a balanced setup for both street and trail use.
Built with premium components focused on strength, fit, finish, function, and proven engineering, the Sport Edition Johnny Joint Suspension System delivers reliable performance and long-term durability. It is designed for Jeep owners who want a capable lift kit that supports larger tires while maintaining a comfortable and controlled ride quality.
This Jeep JK lift kit improves suspension articulation and enhances off-road stability, making it well-suited for weekend trail riding, overlanding, and moderate off-road adventures. It provides a strong foundation for increased tire size, improved stance, and better clearance without requiring a full competition-level suspension setup.
For enthusiasts planning more aggressive off-road builds, RockJock offers a wide range of compatible upgrade components that can be added over time. This allows the Sport Edition system to evolve into a more advanced suspension setup as off-road demands increase, including rock crawling and more technical terrain use.
Kit Fits:
- JK Wrangler (2-door) – All Models
Kit Includes:
- 4 in. Lift Dual-Rate Front And Rear Springs
- Johnny Joint Adjustable Front Upper Control Arms
- Johnny Joint Adjustable Rear Upper Control Arms
- Front and Rear Bump Stop Kits
- Front and Rear Brake Line Relocation Brackets
- Rear Trac Bar Geometry Correction Bracket
- Rear Adjustable Sway Bar Links w/ Sealed Ends
- Rear Shock Relocator Kit
- All Required Hardware
Kit Features:
- RockJock Spec. Dual-Rate Springs – Feature a soft initial rate that absorbs small bumps and trail chop, to deliver a smooth, comfortable ride, while a firmer secondary rate helps soak up larger impacts and reduce bottoming. A key differentiator of RockJock spec. dual-rate springs is the positioning of the crossover point between the initial and secondary spring rates so that a portion of the softer initial rate is available and active at ride height before crossing over to the firmer secondary rate deeper into the travel.
- Bump Stop Spacers – Proper bump stop extensions are a must and our heavy duty kits stand up to hard use while keeping the tires off of your JK’s fenders!
- Johnny Joint Control Arms – Heavy duty adjustable upper control arms feature RockJock Johnny Joints, the original and most durable high-articulation urethane suspension joint on the market. Johnny Joints feature a smooth steel ball that pivots inside a proprietary urethane shell to provide over 30 degrees (per joint) of quiet, shock dampening articulation – without the excessive deflection found in soft rubber-based flex joints. Johnny Joints are so trusted, that they are used by multiple commercial suspension companies, for both street and off-road suspension systems.
Lift Details – The RockJock Suspension System provides 4 in. of suspension lift.
- Actual lift height may vary due to factory build specs. and added equipment and accessories.
Tire Fitment:
- 37 in. tires – no inner fender modification necessary
- 38 in. or larger tires – aftermarket high-clearance fenders suggested/required
See This Kit:
