The JD 8320R tractor with its dual front and rear tires can pull the heaviest load of grain. The J&M grain cart rides on soft plastic tires. The auger pivots to unload the grain into the elevator. The 8320R has a sturdy die-cast body with an oscillating die-cast front axle. Soft plastic tires makes for a smooth ride. The grain cart has a die-cast frame and box which can handle any play.