A driver was transporting ROTAFLEX from Muscat to Nimr. At Manah roundabout, when the driver felt the rear end of the trailer was leaning towards the right, it appeared that the front axle right outer side of the trailer sustained cuts and punctured, the driver slowed down in an attempt to get off the road when he lost control and toppled towards the right side, resulting in damaging the vehicle and load. No injury. Why it happened/Finding : Driver Lost the control of the vehicle whilst trying to get off the road due to biased load following the puncture.