Parts list: № Number Qty Name Options 1 AL156778 1 Extension (Bolt Circle Diameter = 275 mm) Next page: ST709658 Steel Disk Front Wheels, 2 Position, W12X28, 275 mm Bolt Circle Diameter ST813365 Steel Disk Front Wheels, 16 Position, W12X28, 275 mm Bolt Circle Diameter ST857435 Rear Wheel Weights, 2 Weights, Outside Rear Wheel, 250 kg (551 lb) ST926610 Attachment, Rear Wheel Weights, 110 kg (242.5 lb) ST763577 Rear Wheels, Fixed, 2 Position, DW18LX38 ST950679 Rear Wheel Weights, 2 Weights, Outside Rear Wheel, W/ Guide Pin, 250 kg (551 lb) ST762106 Front Wheels, Fixed, DW15X28 ST708284 Steel Disk Rear Wheels, 2 Position, DW15LX34 ST708191 Mounting Parts, Rear Wheels, Flange Axle ST816249 Hub Extension 60 mm, Front, Tread Adjustment