TRI-DRIVE cab and chassis with 18 speed transmission, Cummins ISX engine with 450 HP, 20K front axle, 64K triple locking rears, Air Trac suspension, 445/65R22.5 front tires and 11R24.5 rear tires, 278" wheelbase, 334" bridge, 24' frame behind the cab, and PTO. 168,725 miles.