Parts list: № Number Qty Name Options 1 AL156778 1 Extension (Bolt Circle Diameter = 275 mm) Next page: ST813002 Hub Extension, 30 mm, Rear, Tread Adjustment, Attachment ST709623 Steel Disk Front Wheels, 16 Position, W10X24 ST763577 Rear Wheels, Fixed, 2 Position, DW18LX38 ST763688 Front Wheels, Adjustable, 8 Position, DW12X24 ST994191 Steel Disk Rear Wheels, 2 Position, TW18LX38, 203 mm Bolt Circle Diameter ST763581 Front Wheels, 8 Position, DW12X28 ST709658 Steel Disk Front Wheels, 2 Position, W12X28, 275 mm Bolt Circle Diameter ST762105 Front Wheels, 2 Position, Fixed, DW15X24 ST708191 Mounting Parts, Rear Wheels, Flange Axle ST885957 Mounting Parts, Rear Wheels, Flange Axle, 203 mm Bolt Circle Diameter, W/ Rear Wheel Weight Adaptor