Rancho Short Arm Suspension System Component

2018–2023 Jeep Wrangler Unlimited (Various Models)

RS66125B-2

Overview:

The Rancho Short Arm Suspension System Component is engineered to enhance the off-road and on-road capabilities of the Jeep Wrangler JL Unlimited models from 2018 through 2023. This component, part of a comprehensive lift kit, provides a 4.5-inch lift that increases ground clearance and wheel travel, allowing for improved performance on rugged trails and everyday driving. Designed for Jeep enthusiasts seeking a balance of comfort, durability, and superior articulation, this system is ideal for those looking to fit larger tires and tackle challenging terrain with confidence.

Featuring progressive rate coil springs and adjustable control arms, the Rancho suspension system delivers a smooth ride without compromising strength or reliability. This component is box 2 of 3 in the RS66125B master kit and is essential for completing the full suspension upgrade.

Key Features:

This suspension component incorporates advanced technology and thoughtful design to maximize performance and longevity:

• Includes front and rear corner-specific progressive rate coil springs tuned for superior on-road comfort and off-road capability
• Upper and lower adjustable control arms for precise alignment and improved handling
• Heavy-duty front and rear adjustable track bars to maintain proper axle positioning
• Extended sway bar end links to accommodate increased suspension travel
• Bump stop spacers to prevent suspension damage during extreme articulation
• Maintenance-free D2 high-articulation, grease-free bushings reduce wear by allowing sleeve rotation without resistance
• Designed to fit up to 37-inch tires, enhancing off-road clearance and capability
• Complies with NHTSA FMVSS126 safety standards for vehicle stability
• Compatible with a wide range of Jeep Wrangler Unlimited trims excluding diesel engines
• Backed by Rancho’s limited lifetime warranty for peace of mind

Construction & Design:

Rancho’s suspension components are crafted from high-strength, low-alloy steel to ensure durability and long service life under demanding conditions. The bolt-on design simplifies installation while maintaining structural integrity. The use of progressive rate coil springs allows the suspension to adapt to varying terrain, providing a comfortable ride on pavement and firm support off-road. The adjustable control arms and track bars feature innovative D2 bushings that eliminate the need for grease, reducing maintenance and extending component life.

Installation & Fitment:

This component is designed specifically for Jeep Wrangler Unlimited models from 2018 to 2023, including the 80th Anniversary, Freedom, High Altitude, Islander, Moab, Rubicon, Sahara, Sahara Altitude, Sport, Sport Altitude, Sport S, Willys, and Willys Sport trims. Note that non-Rubicon models will achieve a taller lift height compared to Rubicon versions. Installation requires the complete RS66125B master kit, which includes boxes 1, 2, and 3. When using Rancho RS55067 or RS999067 shocks with Dynamic Rebound Spring, an aftermarket driveshaft is necessary to maximize front axle articulation; however, front RS55065 or RS999065 shocks do not require this modification.

What's Included:

• Front and rear corner-specific progressive rate coil springs
• Upper and lower adjustable control arms
• Heavy-duty front and rear adjustable track bars
• Extended sway bar end links
• Bump stop spacers
• All necessary mounting hardware

Ideal For:

This suspension system component is perfect for Jeep Wrangler owners who want to upgrade their vehicle’s suspension for enhanced off-road performance without sacrificing on-road comfort. It suits enthusiasts who plan to install larger tires up to 37 inches and require increased ground clearance and wheel travel for rock crawling, trail riding, or daily driving. It is also ideal for those seeking a durable, maintenance-free suspension solution backed by a trusted brand.

Rancho is a performance suspension and shock brand for trucks, SUVs, and Jeeps, offering shocks/struts, steering stabilizers, leveling kits, and lift systems built for trail and daily use. Their products are aimed at improving control and stability on rough terrain while maintaining everyday drivability—ideal for rigs that tow, haul, and still see dirt on the weekends.