The Gravely 12-G is a garden tractor produced from 1987 to 1991 as part of the Professional G Series. It features a 12 hp Kohler 1-cylinder gasoline air-cooled engine, an 8-speed shaft-driven gear transmission with 4 reverse speeds, and two-wheel drive with manual steering. The tractor has a wheelbase of 52.3 inches, weighs 850 lbs, and uses lawn/turf tires sized 16x6.50-8 front and 23x8.50-12 rear. It supports various attachments including 40" and 50" mid-mount mower decks, a snowblower, and a blade. Electrical system is 12 volts with negative ground.