The Gibson SD is a small farm tractor built by Gibson in Longmont, Colorado, USA. It features a Wisconsin AEH 0.4L 1-cylinder air-cooled gasoline engine producing 6 hp (4.5 kW). The tractor has a 3-speed gear transmission with 3 forward and 1 reverse gears. It is two-wheel drive with manual tiller steering and an open operator station. The tractor weighs 1065 lbs (483 kg) and uses 4.00x12 front tires. It is capable of pulling 1 plow.
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