Fabtech Radius Arm Kit

2013–2018 Ram 3500

K3147DL

Overview:

The Fabtech 7-inch Radius Arm Kit is a premium suspension upgrade designed specifically for 2013 to 2018 Ram 3500 trucks. This kit delivers a significant improvement in ride quality over the factory suspension while maintaining the vehicle’s heavy load-carrying capabilities. Featuring Fabtech’s innovative coil spring suspension system with a straight spring design and patent-pending angled lower mounts, this kit offers a smoother, more controlled ride both on and off-road. It is ideal for Ram 3500 owners seeking enhanced suspension performance without sacrificing factory load ratings.

Engineered to replace the factory high-rate bowed coil springs, which tend to produce a stiff and reactive ride, Fabtech’s straight coil springs provide a lower spring rate for improved comfort. The system includes 2.25-inch DLSS shocks that complement the suspension geometry, ensuring better handling and control over rough terrain. This radius arm lift system raises the truck by 7 inches, allowing for larger tires and improved ground clearance.

Key Features:

This Fabtech Radius Arm Kit combines advanced engineering and durable components to enhance your Ram 3500’s suspension performance:

• 7-inch suspension lift for increased ground clearance and aggressive stance
• Straight coil spring design with patent-pending angled lower mounts for a smoother ride
• Includes 2.25-inch DLSS shocks optimized for improved damping and control
• Maintains factory load-carrying capacity despite lowered spring rate
• Compatible with tire sizes up to 38x13.50R22 with minor trimming
• Supports wheel sizes from 17x9 to 22x10 with 5-inch backspacing
• Exclusive coil spring suspension system not offered by other Ram suspension kits
• Designed for heavy-duty use on and off-road
• Does not fit vehicles equipped with factory air suspension

Construction & Design:

Fabtech’s Radius Arm Kit is built with high-quality materials engineered for durability and long-lasting performance. The coil springs utilize a straight design, which reduces spring rate and improves ride comfort without compromising load capacity. The patent-pending angled lower mounts optimize spring positioning to absorb road irregularities more effectively than the factory bowed springs.

The included 2.25-inch DLSS shocks are designed to work in harmony with the coil springs, providing superior damping characteristics that enhance vehicle stability and control. All components are precision-engineered to ensure proper fitment and alignment, preserving the factory suspension geometry and handling characteristics.

Installation & Fitment:

This radius arm lift system is designed for direct fitment on 2013 to 2018 Ram 3500 models, including Big Horn, Laramie, Laramie Limited (2014–2015), Laramie Longhorn, Limited (2016–2018), Lone Star (2013–2015, 2017), SLT, ST (2013), and Tradesman trims. Installation requires minor trimming to accommodate larger tires and wheels but does not require extensive modifications.

Note that this kit is not compatible with Ram 3500 trucks equipped with factory air suspension systems. Professional installation is recommended to ensure proper alignment and suspension performance.

What's Included:

• 7-inch radius arms
• Straight front coil springs with angled lower mounts
• 2.25-inch DLSS shocks
• All necessary hardware for installation
• Detailed installation instructions

Ideal For:

This Fabtech Radius Arm Kit is perfect for Ram 3500 owners who demand a smoother, more comfortable ride without sacrificing the truck’s heavy-duty capabilities. It is especially suited for those who use their trucks for towing, hauling, or off-road adventures and want to upgrade their suspension for better handling and larger tire fitment. Whether you’re navigating rough trails or cruising on the highway, this kit enhances your truck’s performance and ride quality.

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.