The FasTrak and FasTrak Super Duty mowers from Hustler Turf Equipment utilize the Hydro-Gear Commercial™ ZT-3100® Drive System to ensure dependable performance year after year.  The ZT-3100 provides the necessary output torque to overcome the most demanding turf challenges. Equipped with a 1 inch axle and external spin-on filter, the ZT-3100 is built to last.