Hummel Side (front) wheels.. tires..  These are aftermarket (not OEM) tires made to fit your old Hummel.  These are the older Hummels from before June 1999 (approx.)  You can identify these machines due to the side wheels having a "hub-cap" style cover with 4 screws..  (The newer Hummels have 1 screw in the center)

These tires do not come with centers..  Only plastic tires as shown in picture.  Price is for 1 tire..  not 2.  For complete set order 2