Designed and developed in response to customer input, the 7 models in the Z900 lineup feature the durable 7-Iron Pro deck with stamped, 7 ga. steel, full-wrap reinforcement and Mulch-on-Demand capabilities. With top mowing speeds of 10.5 or 12 MPH, each model has the power and performance operators demand. For superior controllability, the Z900s include a new, ground-drive transmission featuring a piston motor, internal wet disc brakes and a gear reduction final drive, providing more torque to the drive tires. Users will also appreciate the Comfort & Convenience package with ergonomic control levers including built-in PTO shutoff and electronic deck raise and lower. And for effortless operation, the series offers dial-in height of cut adjustment on the control panel, on-board self-diagnostics, run-flat tires and John Deere’s exclusive Brake & Go system.