Parts list: № Number Qty Name Options 1 AL156778 1 Extension (Bolt Circle Diameter = 275 mm) Next page: ST728245 Attachment, Hub Extension, 44 mm, Rear, Tread Adjustment ST728566 Steel Disk Rear Wheels, Adjustable, 16 Position, DW15LX26 ST760793 Steel Disk Front Wheels, 16 Position, DW12X38, W/ Narrow Tread Setting ST762044 Steel Disk Rear Wheels, 16 Position, DW10X46, 203 mm Bolt Circle Diameter ST775722 Cast Rear Wheel Disk, Rack and Pinion Axle, 787 mm Bolt Circle Diameter ST709667 Mounting Parts, Front Wheels, MFWD Axle ST709664 Steel Disk Front Wheels, 2 Position, W12X24, 275 mm Bolt Circle Diameter ST709659 Steel Disk Front Wheels, 2 Position, W15LX24, 275 mm Bolt Circle Diameter ST709633 Steel Disk Front Wheels, 16 Position, W15LX24 ST709632 Steel Disk Front Wheels, 16 Position, W12X24