Designed for 2011-2016 Ford F250 4WD models, Fabtech’s Radius Arm System is built to handle the demanding on-road and off-road requirements of Super Duty enthusiasts. This complete suspension upgrade replaces key factory components to deliver increased strength, improved geometry, and reliable performance when running oversized tires.
At the core of this system are Fabtech’s heavy-duty tubular Radius Arms. Inspired by Fabtech’s race-proven suspension components, these arms feature a tubular structure reinforced with dimple-die side plates and heavy gusseting for maximum durability. This design offers a substantial strength upgrade over the factory stamped radius arms, making them ideal for rugged off-road use.
This system includes the massive Dirt Logic 4.0 Coilover Conversion, delivering outstanding off-road damping capability while maintaining a smooth and controlled highway ride. The coilovers bolt directly into the factory coil spring location without requiring removal of the original coil bucket, ensuring a straightforward installation.
The Dirt Logic 4.0 Coilovers feature 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 platform, it is engineered to withstand the harshest driving conditions.
Premium components combined with properly engineered suspension geometry set this Radius Arm system apart from all other Radius Arm suspensions. This complete suspension system is backed by a free 5-year, 60,000-mile powertrain warranty for added peace of mind.








