For safest handling, the heaviest trailer should be: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question For safest handling, the heaviest trailer should be: Answers Positioned close to the tractor. Positioned in the middle of a combination. Outfitted with double tires. Explanation In a double or triple combination, the heaviest trailer should be placed immediately behind the tractor.