Designed for 2011-2016 Ford F250 4WD models, Fabtech’s Radius Arm System is engineered to handle the demanding on-road and off-road needs of Super Duty enthusiasts. This complete suspension upgrade delivers increased strength, improved geometry, and reliable performance when running oversized tires.
The foundation of this high-quality system is Fabtech’s tubular Radius Arms. Drawing from Fabtech’s extensive off-road racing experience, these arms feature a tubular construction reinforced with a dimple-die side plate and heavy gusseting for maximum durability. This design provides a significant strength upgrade over the factory stamped radius arms.
Included in the system is the massive Dirt Logic 4.0 Coilover Conversion, delivering outstanding off-road damping performance while maintaining a smooth and controlled highway ride. The coilover bolts directly into the factory coil spring location without requiring removal of the stock coil bucket, allowing for a clean and efficient installation.
The Dirt Logic 4.0 Coilover features a giant 4-inch diameter aluminum remote reservoir mounted horizontally above the coilover, allowing full compression travel even with oversized tires. As the largest and most robust coilover available for the Ford Super Duty, it is built to handle the harshest driving conditions.
Properly engineered suspension geometry and premium components set this Radius Arm system apart from all others in its class. This complete suspension system is backed by a free 5-year, 60,000-mile powertrain warranty for added peace of mind.








