Skyjacker Long Travel Rear Coil Spring Set

2007–2018 Jeep Wrangler 4-Door JK

Part #: JKU40RDR

Overview

The Skyjacker Long Travel 4-inch Rear Coil Spring Set is engineered specifically for 2007 to 2018 Jeep Wrangler 4-door JK models, delivering a reliable and effective suspension lift. Designed to provide a 4-inch lift while maintaining coil position at full droop, these springs maximize articulation and off-road capability without compromising ride quality. Ideal for Jeep enthusiasts seeking enhanced suspension travel and improved off-road performance, this coil spring set balances durability with comfort for both daily driving and rugged terrain.

Constructed to match OEM spring rates, the springs ensure a smooth, controlled ride while offering the added height needed for larger tires and improved ground clearance. Backed by Skyjacker’s lifetime warranty, these springs offer lasting reliability for serious off-roaders and Jeep owners looking to upgrade their suspension system.

Key Features

Skyjacker’s Long Travel Rear Coil Springs combine advanced materials and design to deliver superior performance and durability. Key features include:

• Provides a 4-inch rear lift for increased ground clearance and tire clearance
• Dual rate coil design maintains coil position at full droop for maximum articulation
• Constructed from high-strength alloy steel to resist sagging and fractures
• Powder-coated finish for enhanced corrosion resistance and long-lasting durability
• Matched to OEM spring rates to preserve factory ride quality and handling characteristics
• Specifically designed for 4-door Jeep Wrangler JK models (2007–2018)
• Improves off-road suspension travel and articulation for better terrain adaptability
• Backed by a lifetime warranty for peace of mind and product confidence

Construction & Design

These rear coil springs are crafted from a higher strength alloy steel, engineered to withstand the rigors of off-road use while preventing common issues such as sagging and fractures. The dual rate design ensures that the springs maintain proper coil position even at full droop, allowing for maximum suspension articulation and wheel travel. This design is critical for off-road enthusiasts who demand both lift and flexibility from their suspension components.

The springs are finished with a durable powder coat that protects against rust and corrosion, extending the lifespan of the springs in harsh environments. The precise engineering and quality materials used in these springs ensure consistent performance and reliability over time.

Installation & Fitment

The Skyjacker Long Travel Rear Coil Springs are a direct fit replacement for the rear suspension of 2007–2018 Jeep Wrangler 4-door JK models. Installation typically requires standard suspension tools and mechanical knowledge. No major modifications are necessary, making it a straightforward upgrade for experienced DIYers or professional installers. These springs are designed to work seamlessly with OEM components and other Skyjacker suspension products for a complete lift system.

What's Included

• Set of two (2) rear dual rate long travel coil springs
• Installation instructions

Ideal For

This coil spring set is ideal for Jeep Wrangler JK owners who want to achieve a 4-inch rear lift without sacrificing ride quality or articulation. It suits off-road enthusiasts who require enhanced suspension travel for technical trails, rock crawling, and uneven terrain. Additionally, it is perfect for those upgrading to larger tires or seeking improved ground clearance for overlanding and daily driving versatility.

Skyjacker is a long-running off-road suspension brand offering lift kits, shocks, steering stabilizers, and related components for trucks, SUVs, and Jeeps. Built to increase clearance for larger tires and improve trail capability, Skyjacker systems are popular for enthusiasts who want a tougher stance and more off-road confidence with proven application coverage.