... .6*4 STQ4250L7Y9S3 2..Engine:375HP Euro3 3.Towing mass: 50T SITOM Heavy-duty 40 ton trailer truck “YOULONG” 6×4 Tractor ... 10,9.41,7.31,5.71,4.46,3.48,2.71,2.11,1.64,1.28 ... . towing mass:60000kgCabinT360 high-roof,rear mechanical type suspension,3 seats,with sleeper, with air conditionChassis frameReinforced,Frame breadth ... Parking brake:spring type air shut-off brake,3.Assistant brake:engine exhaust brake