Vehicle suspension with clearance shifting

A support assembly for supporting a vehicle chassis on a wheel of the vehicle, the support assembly being pivotably connected to the vehicle chassis through an axle member, the support assembly comprising:

• a first strut bar and a second strut bar slidingly coupled with the axle member;
• a wheel attachment and a suspension member slidingly coupled with the support assembly through the strut bars;
• a pneumatic spring operably interposed between and attached to the suspension member and the axle member;
• at least one axle lock moveably interposable between a position coupled to the axle member and at least one of the strut bars;
• at least one suspension lock moveably interposable between a position coupled to the suspension member and at least one of the strut bars;
• wherein the support assembly is configured to:
• act as a suspension element of the vehicle through the pneumatic spring when the suspension lock is in a locked position and the axle lock is in an unlocked position;
• and
• shift the clearance of the chassis between a low clearance condition and a high clearance condition, the shifting comprising alternately changing the axle lock and the suspension lock between a locked position and an unlocked position while alternately inflating and deflating the pneumatic spring.