Determine is how much ground clearance you have from the floor of the dump bed to the ground. If you have less than 44 inches, you need Meyer’s Replaceable Tailgate Spreader. In-season, Meyer RTGs easily replace your existing tailgates and provide adequate ground clearance for the spinner mechanism. Vehicle: Dump Truck Tailgate. Body Width: 78" - 84", RTG-XL: 84" - 90". Materials: Salt, 50/50 Salt-Sand, and Sand. Motor: Electric. Construction: Stainless Steel.