The Mitsubishi GS21 is a compact utility tractor produced from 2003 to 2005 as part of the GS Series. It features a 1.3L 3-cylinder liquid-cooled diesel engine producing 20.7 hp (15.4 kW) with an 8-speed transmission. The tractor includes four-wheel drive, power steering, wet disc brakes, and a two-post ROPS with an optional cab variant (GS21X). It has a wheelbase of 57.1 inches (145 cm), weighs between 1896 to 2337 pounds depending on configuration, and uses 6-14 front tires and 8.3-24 rear tires. The rear PTO operates at 540 rpm with multiple engine RPM settings. Electrical system is 12 volts with negative ground.