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 ST728564 Steel Disk Rear Wheels, 16 Position, W15LX24 ST728566 Steel Disk Rear Wheels, Adjustable, 16 Position, DW15LX26 ST744039 Front Wheels, 16 Position, W12X30 ST760793 Steel Disk Front Wheels, 16 Position, DW12X38, W/ Narrow Tread Setting ST726768 Mounting Parts, Rear Wheels, Flange Axle, 203 mm Bolt Circle Diameter ST709894 Rear Wheel Weights, 4 Weights, Inside Rear Wheel, W/ Reinforcement, 55 kg (121 lb) ST709662 Steel Disk Front Wheels, 2 Position, W10X28, 275 mm Bolt Circle Diameter ST709658 Steel Disk Front Wheels, 2 Position, W12X28, 275 mm Bolt Circle Diameter ST709655 Steel Disk Front Wheels, 2 Position, W15LX28, 275 mm Bolt Circle Diameter