Parts list: № Number Qty Name Options 1 AL230221 2 Wheel TW25BX42, For Tire Size Refer to Tire Manual of Manufacturer Next page: ST828906 Steel Disk Front Wheels, 16 Position, W10X38, 335 mm Bolt Circle Diameter ST775840 Cast Rear Wheels, W12AX54 ST478249 Rear Wheels, Adjustable, DW23BX42 ST775981 Rear Wheels, Rack and Pinion Axle, DW15AX50 ST827534 Steel Disk Front Wheels, 2 Position, DW15LX30, 335 mm Bolt Circle Diameter ST981368 Cast Rear Wheels, MW23AX38, Rack and Pinion Axle, 50 km/h (31 mph) ST858122 Cast Rear Wheels, WH10AX54, Rack and Pinion Axle ST478216 Steel Disk Rear Wheels, TW25BX42 (673929 - 964998) ST590899 Steel Disk Rear Wheels, 2 Position, TW23BX38, 335 mm Bolt Circle Diameter, W/ Reinforcement ST1021644 Cast Rear Wheel Rims, MW20BX38, Rack and Pinion Axle, 814 mm Bolt Circle Diameter