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 ST738160 Steel Disk Rear Wheels, 16 Position, DW15LX38, 203 Bolt Circle Diameter (Narrow) ST762045 Steel Disk Front Wheels, 16 Position, W10X32, 275 mm Bolt Circle Diameter ST776123 Cast Rear Wheels, DW15LX34, TW15LX34, Rack and Pinion Axle ST709894 Rear Wheel Weights, 4 Weights, Inside Rear Wheel, W/ Reinforcement, 55 kg (121 lb) ST709664 Steel Disk Front Wheels, 2 Position, W12X24, 275 mm Bolt Circle Diameter ST709647 Rear Wheel Weights, 2 Weights, Inside Rear Wheel, W/ Reinforcement, 55 kg (121 lb) ST709634 Front Wheels, Adjustable, 16 Position, W10X28 ST709616 Front Wheels, W12X28