Wirtgen W 60i rear-loading cold mill cuts 24 inches wide and 12 inches deep. Tier 4-Interim Deutz engine generates 215 horsepower. The milling machine comes in three- or four-wheel models, with a fold-in support wheel and detachable loading conveyor. Wirtgen Widrive electronic machine control system governs the diesel engine speed, turns the water spray system on or off, governs the conveyor belt speed, or assists the machine driver in operating the leveling system. Two discharge conveyor options are available: the standard discharge conveyor, or a folding discharge conveyor that shortens the overall transport length.