John Deere introduces a full new line of commercial walk-behind mowers for 2011. The WG and WH Series feature six new models in the 16 to 20 hp range with gear or hydrostatic transmission. The gear models feature a robust 7-gauge fabricated deck and a smooth-running 5-speed transmission that complement the 16-hp Kawasaki engine. These models are also equipped with flat-free front tires for improved performance. The hydro models include 7-gauge fabricated floating decks and twin-loop handle controls that feature front and rear index bars. These models are equipped with either a 16- or 20-hp Kawasaki engine and also have flat-free front tires.