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 ...

Under the rule, all 53-foot box-type trailers (dry or refrigerated) must be equipped with Environmental Protection Agency SmartWay-approved side skirts ... The way we view today’s aerodynamic ...

In the study released today, the Insurance Institute for Highway Safety (IIHS) ran two tests crashing a passenger sedan at 35 mph into the side of a 53-ft. dry van trailer. In one test ...