Measured the diameter and it appears to be 16 1/2 inches. The majority of the wheel is steel but the hub section appears to have a brass section. I found an old Goodrich ad (1926) which showed the tire…black and smooth. Does anyone have the specs of a wheel from a Jenny so I can compare? A close up pic would be super. If it turns out to be that, just a ballpark figure on value please? Thanks again JO BO