2020 MASABA, Semi-Trailers - Lowboy Trailers, Masaba Single Axle Booster Tag Axle. Main Frame - constructed of wide flange beam. Single Axle with (4) 11R x 22.5 radial tires, air brakes, mud flaps, brake & directional signals Chassis Overload System - Plant main frame is protected from overload due to bridging. The booster is equipped with a Nitrogen gas charged accumulator to maintain pressure in the hydraulic system. In the event of an overload at the booster the accumulators will relieve thus allowing the hydraulic cylinders to retract which in turns eliminates any excessive chassis loadings., Suspension, Composition, , , L x W x H: x x