Fabtech Radius Arm Kit

2013–2018 Ram 3500 4WD

K3144

Overview:

The Fabtech Radius Arm Kit with Performance Shocks is engineered specifically for 2013 to 2018 Ram 3500 4WD trucks, delivering a superior suspension upgrade that enhances ride quality and off-road capability. Designed to replace the factory radius arms and coil springs, this kit offers a smoother on-road experience while maintaining the heavy load capacity Ram 3500 owners rely on. Ideal for drivers who demand both comfort and durability, Fabtech’s innovative design addresses the shortcomings of the stock suspension by reducing stiffness and improving response to varying road conditions.

Fabtech’s exclusive coil spring system features a straight spring design paired with patent-pending angled lower mounts, resulting in a noticeably smoother ride compared to the factory bowed springs. This kit is perfect for Ram 3500 owners who want to run larger tires up to 37 inches with minor trimming and maintain excellent vehicle control on and off the pavement.

Key Features:

Fabtech’s Radius Arm Kit offers a range of advanced features engineered for performance and durability:

• 5-inch front suspension lift designed for Ram 3500 4WD models from 2013 to 2018
• Exclusive straight coil spring design with patent-pending angled lower mounts for improved ride comfort
• Performance shocks included to enhance damping and handling characteristics
• Supports tire sizes up to 37x13.50R22 with minor trimming required
• Maintains factory load carrying capacity despite a lower spring rate for smoother ride quality
• Compatible with wheel sizes ranging from 17x9 to 22x9.5 with 5-inch backspacing
• Engineered specifically for diesel engines; not compatible with gas motors or factory air suspension
• Heavy-duty construction designed to withstand rough off-road conditions and heavy hauling

Construction & Design:

Fabtech’s Radius Arm Kit is crafted from high-strength steel components engineered for durability and long-lasting performance. The coil springs utilize a straight design that reduces spring rate compared to the factory bowed springs, delivering a smoother ride without sacrificing load capacity. The patent-pending angled lower mounts optimize spring alignment and suspension geometry, enhancing both comfort and handling.

Performance shocks included in the kit are tuned specifically for the Ram 3500’s weight and suspension travel, providing improved damping control over stock units. All components are precision-engineered to fit seamlessly with the factory mounting points, ensuring a reliable and robust upgrade that stands up to demanding driving conditions.

Installation & Fitment:

This Radius Arm Kit is designed for direct fitment on 2013 to 2018 Ram 3500 4WD trucks, including Big Horn, Laramie, Laramie Limited (2014–2015), Laramie Longhorn, Limited (2016–2018), Lone Star (2013–2015, 2017), SLT, ST, and Tradesman trims. Installation requires minor trimming when running larger tires up to 37 inches, depending on wheel size and offset.

Note that this kit is not compatible with gas engine models or trucks equipped with factory air suspension. Professional installation is recommended to ensure proper alignment and suspension geometry for optimal performance and safety.

What's Included:

• Front radius arms with heavy-duty construction
• Straight coil springs with patent-pending angled lower mounts
• Performance-tuned front shocks
• All necessary hardware and mounting components
• Detailed installation instructions

Ideal For:

This Fabtech Radius Arm Kit is ideal for Ram 3500 owners seeking a balanced suspension upgrade that improves ride comfort without compromising load capacity. It is perfect for those who frequently haul heavy loads, tow, or venture off-road and require a suspension system that can handle rough terrain while maintaining on-road drivability. Enthusiasts looking to fit larger tires up to 37 inches will appreciate the kit’s compatibility and minor trimming requirements.

Fabtech is an off-road suspension leader producing lift kits, shocks, and related components to increase ride height, clear larger tires, and improve capability. Their systems are engineered for specific trucks and SUVs, blending on-road drivability with the added travel and strength enthusiasts want for trails, desert runs, and overland builds.