In one example, a continuous track transport system for an irrigation system is provided that includes a continuous track with multiple track plates arranged so that adjacent plates are directly connected to each other, and also includes a gear train connected with the continuous track and operable to transmit an input torque to the continuous track to effect movement of the continuous track. The gear train includes a drive gear having an interface that is connectible to a gearbox of an irrigation system chassis, first and second driven sprocket-gears engaged with the continuous track, each of first and second driven sprocket-gears including a respective driven gear engaged with the drive gear, and a frame to which one or more gears of the gear train are rotatably mounted. Any one or more of the drive gear, sprocket-gear, and frame may comprise, or consist of, molded, glass-filled nylon.