The SX7 side dump trailer has seven axles, a 40-foot tub, and 53-foot trailer.
The tub design incorporates three standard axles and four Ridewell steerable lift axle suspensions. The 40-ton hauling capacity does not exceed 129,000 GVW rating with the right truck configuration, according to the company.
Cylinders are positioned at each end of the tub, so the tub can be positioned at any point on the trailer frame.