The Lanz HR5 15-30 is a standard-tread farm tractor produced by Lanz from 1929 to 1935 as part of the Bulldog Series. It features a 10.3L single-cylinder liquid-cooled oil engine producing 30 hp, paired with a 3-speed gear transmission. The tractor has a wheelbase of 73.4 inches and weighs 5688 lbs. It is equipped with 900x150 front tires and 1150x300 rear tires, and offers two-wheel drive with manual steering and an open operator station.