Allis-Chalmers 100 Self-Propelled Combine, Allis-Chalmers 226 4-Cyl Gas Engine, High/Low/Reverse Transmission W/ Variable Speed Drive, Rotary Chopper, 10-24 Drive Tires Front Tires, 6.00-16 Rear Tires, Hydraulic Header Raise/Lower, Scour-Kleen System, Unloading Auger, Includes (2) Additional Drive Tires/rims (see Photos), NOTE: STRAW SPREADER PULLEYS & MOUNTING BRACKET NOT INCLUDED SELLING SEPARATELY, SEE SELLERS ADDITIONAL ITEMS SELLING FOR STRAW SPREADER ATTACHMENT, SN: 4221