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The Super Duty® Chassis Cab features a fully boxed under-cab and C-channel aft-of- cab frame made of high-strength steel with up to 10 crossmembers (8 through-welded). A 3-hole pattern added to the bottom side of the frame allows for easier aftermarket hitch installation and an open C-channel frame aft-of-cab features a standard 34" frame-rail width.
The 2021 Ford Super Duty® Chassis Cab features a high-strength, military-grade60 aluminum-alloy body. It’s lighter than the previous generation steel, yet immensely strong. It’s also more dent and ding resistant and not subject to red rust corrosion. Beneath the aluminum body is a fully boxed under-cab and C-channel aft-of-cab frame built of high-strength steel.
The frame of today’s generation of Ford Super Duty® is stronger than ever before and also makes adding an upfit easier. The axles, suspension, brakes, driveline and transfer case are also larger and heftier than the previous generation for greater strength and capability. Super Duty Chassis Cabs are more than up to the task of taking on the toughest jobs in the most demanding industries.