Fabtech’s legendary Radius Arms are engineered as the ultimate upgrade for the Ford Super Duty front suspension on lifted applications. Designed for strength and durability, their heavy-duty tubular construction delivers race-inspired performance suitable for aggressive offroad use while maintaining excellent on-road manners.
These Super Duty Radius Arms directly replace the factory arms and are designed for use with 4″ to 8″ lifted suspensions. Each arm features an additional 1 degree of built-in caster, and when combined with adjustable alignment cams, provides up to 2 degrees more caster than stock. This greatly improves highway tracking and steering stability, especially on taller 6″ and 8″ lift setups.
The upper and lower tubes are constructed from 1.75″ OD x .120″ wall DOM steel tubing and are fully welded closed to prevent internal corrosion. The arms are offset and positioned inboard compared to factory arms, allowing full steering lock with 13.50″ wide tires on a 5″ backspace wheel.
Fabtech’s open-arm design allows complete powdercoat coverage for superior corrosion resistance, eliminating the moisture-trapping issues commonly found in boxed-style arms. Proven for over 15 years in consumer, commercial, and military applications, these Radius Arms deliver unmatched reliability and performance for your Super Duty.
