... , single axle,2 wheel,dual axle,4 wheel, rear lights,self-unloaing, pneumatic brake tractor trailer,with CE,two axles,4 ... wheels,payload from 1 to 10 tons.self-discharge,good quality and high efficiency.tractor trailer, trailed by ... / 4 7.50-16/4unloading form3-way self-dump hydraulic self-dump,left and right hydraulic self side dumpBrake formInflatable brake or automatically air-cut ...