The Claas Ares 657 is a row-crop tractor produced from 2005 to 2007 as part of the Ares 600 Series. It features a John Deere 6.8L 6-cylinder turbocharged diesel engine delivering 123.2 hp (net) with a 24-speed power shuttle transmission. The tractor includes four-wheel drive, power steering, wet disc brakes, and a Claas ATZ cab with air-conditioning and suspension. It has a wheelbase of 111 inches, weighs 11089 lbs, and uses standard agricultural tires sized 14.9R28 front and 20.8R38 rear. The hydraulic system is open center with optional PFC and pump flows up to 29.1 gpm. The rear PTO is independent with wet disc clutch and operates at 540/1000 rpm.