Rancho Adjustable Control Arm Kit (FRONT UPPER)

2007–2018 Jeep Wrangler / Wrangler JK

RS66155B

Overview:

The Rancho Adjustable Control Arm Kit (Front Upper) is engineered to enhance the ride quality and suspension performance of your Jeep Wrangler, whether stock or lifted up to 4 inches. Designed specifically for Jeep Wrangler models from 2007 through 2018, including the JK generation, this kit provides precise control over suspension geometry. By allowing adjustment of caster and pinion angles, it helps maintain proper alignment and handling characteristics after lift installation or suspension modifications.

Ideal for Jeep owners seeking improved durability and comfort, the Rancho control arms reduce noise, vibration, and harshness, delivering a smoother driving experience both on and off-road.

Key Features:

This adjustable control arm kit incorporates advanced materials and design elements to ensure long-lasting performance and ease of use:

• Adjustable design allows fine-tuning of caster and pinion angles for optimal suspension alignment
• Constructed from heavy-duty 1.25-inch outer diameter tubing with 0.188-inch DOM wall thickness for superior strength
• Equipped with Rancho’s D2 maintenance-free bushings featuring a PTFE liner for self-lubrication and long service life
• Forged ends enhance durability and resistance to wear under demanding conditions
• Black powder-coat finish provides excellent corrosion resistance and a rugged appearance
• Preassembled control arms simplify installation and reduce setup time
• Compatible with stock and lifted Jeep Wrangler JK models up to 4 inches
• Backed by Rancho’s limited lifetime warranty for added peace of mind

Construction & Design:

The Rancho Adjustable Control Arm Kit is built with high-quality materials engineered to withstand the rigors of off-road driving and daily use. The 1.25-inch diameter bars are fabricated from heavy-duty DOM (Drawn Over Mandrel) steel tubing with a 0.188-inch wall thickness, providing exceptional strength and rigidity. Forged ends ensure secure mounting points that resist deformation over time.

Rancho’s proprietary D2 bushings are a standout feature, incorporating a PTFE liner that acts as a self-lubricating agent. This design eliminates the need for regular greasing, reduces noise and vibration, and maintains precise articulation throughout the suspension’s range of motion. The durable black powder-coat finish protects the arms from rust and corrosion, extending the lifespan of the components even in harsh environments.

Installation & Fitment:

Installation is straightforward thanks to the preassembled control arms, designed to fit directly onto Jeep Wrangler JK models from 2007 to 2018. This kit supports both stock suspensions and lifts up to 4 inches, making it a versatile upgrade for a wide range of Jeep configurations. No major modifications are required, and the adjustable feature allows for fine-tuning after installation to achieve optimal suspension geometry and handling.

What's Included:

• Two preassembled front upper adjustable control arms
• Hardware necessary for installation
• Installation instructions

Ideal For:

This control arm kit is perfect for Jeep Wrangler owners who want to improve suspension performance and ride quality, especially those who have installed or plan to install a lift kit up to 4 inches. It suits off-road enthusiasts seeking enhanced durability and articulation, as well as daily drivers looking for reduced noise and vibration. The adjustable design also appeals to those who require precise alignment adjustments to maintain optimal handling characteristics.

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.