The Challenger MT555D is a row-crop tractor produced from 2012 to 2014 as part of the MT500D Series by Challenger, a part of AGCO. It features a 6.6L AGCO Power 6-cylinder turbocharged intercooled diesel engine with 170 hp rated power and a maximum of 185 hp. The tractor offers transmission options including a 24-speed six-speed power shift (AutoPower VI) and a continuously variable transmission (TechStar CVT). It has a wheelbase of 117.8 inches, weighs 17000 lbs, and comes with standard agricultural tires sized 420/85R28 front and 480/80R42 rear. The tractor includes four-wheel drive, electro-hydraulic differential lock, hydrostatic power steering, and hydraulic wet disc brakes. It supports a rear PTO with multiple speed options and has a fuel capacity of 114 gallons. The MT555D was manufactured in Beauvais, France and Jackson, Minnesota, USA, with original prices ranging from $146,656 to $181,317 depending on the model variant.