Fabtech Radius Arm Kit

2019–2023 Ram 2500 / 2020 Ram 3500

K3180

Overview:

The Fabtech Radius Arm Kit is a comprehensive suspension upgrade designed specifically for Ram 2500 models from 2019 to 2023 and Ram 3500 models from 2020. This kit enhances the factory suspension system by incorporating Fabtech’s signature tubular radius arms, engineered to improve caster angles and accommodate larger tires and lifted suspension setups. Ideal for enthusiasts seeking a balance between rugged off-road capability and refined on-road comfort, this kit addresses common ride quality issues found in stock Ram coil springs.

By replacing the factory front coil springs with a straight vertical coil design and utilizing a patented angular spring mount, Fabtech delivers a smoother, more controlled ride without sacrificing load capacity. The rear suspension features a dual-rate coil spring setup that maintains excellent highway comfort while supporting heavy payloads. This kit is a complete solution for those looking to lift their Ram trucks with confidence and durability.

Key Features:

Fabtech’s Radius Arm Kit offers a range of advanced features designed to optimize suspension performance and durability:

• Exclusive tubular radius arms with dimple die side plates for enhanced strength and increased caster angle.
• Front straight coil springs paired with Fabtech’s patented angled spring mounts to eliminate spring bow and reduce harshness.
• Heavy-duty 1/4" thick steel front and rear track bar drop brackets to properly center axles under the vehicle at lifted heights.
• Dual-rate rear coil springs providing a smooth ride during normal driving and firm support under heavy loads.
• Fabtech-designed heavy-duty steel front bump stop extensions that retain factory bump stop cushions for progressive damping and prevent suspension overtravel.
• Compatible with oversized tires up to 37" with minor trimming required.
• Maintains factory load carrying capacity while improving ride quality and suspension geometry.

Construction & Design:

Fabtech’s Radius Arm Kit is built with durability and performance in mind. The radius arms are crafted from high-strength tubular steel featuring dimple die side plates, a hallmark of Fabtech’s engineering that adds rigidity without excessive weight. The front coil springs are redesigned with a straight vertical coil to replace the factory bowed springs, improving ride comfort and suspension response. The patented angular spring mounts allow these straight coils to fit seamlessly onto the stock spring seats.

Track bar drop brackets and bump stop extensions are fabricated from heavy-duty steel to withstand the stresses of lifted suspension and off-road use. This robust construction ensures long-lasting performance and reliable handling in demanding conditions.

Installation & Fitment:

The Fabtech Radius Arm Kit is designed for direct fitment on Ram 2500 models from 2019 through 2023 and Ram 3500 models from 2020. Installation requires minor trimming to accommodate larger tires, specifically 37x12.50R17, 37x13.50R18, and 37x13.50R20 sizes with 5" backspacing wheels. The kit does not fit standard cab models, factory air suspension setups, gas engines, or Power Wagon models from certain years. Professional installation is recommended to ensure proper alignment and suspension geometry adjustments.

What's Included:

• Fabtech tubular radius arms with dimple die side plates
• Front straight coil springs with patented angular spring mounts
• Heavy-duty front and rear track bar drop brackets
• Heavy-duty steel front bump stop extensions
• Dual-rate rear coil springs
• All necessary hardware for installation

Ideal For:

This Radius Arm Kit is perfect for Ram 2500 and 3500 owners who want to lift their trucks for improved off-road capability and aggressive tire fitment while maintaining excellent ride quality and factory load capacity. It is especially suited for those who experience harsh ride characteristics with stock suspension and seek a more controlled, comfortable driving experience without compromising durability or performance.

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.