Unfortunately we never carried the bearing for a Wico unit and I am not sure who would since the unit has not been made in 20+ years.' I would have to assume Mikes added the wico sized bigger bearing.
We did at one time sell Mikes arcade and Arcade shop the 2.25' rollers / shafts but have not for a few years as we have less than one hundred 2.25' rollers and shafts left. We purchased Imperial trackballs a while ago with all the parts and molds and still produce the 3' units to this day. One of the slight changes were the bearings we slightly larger and the inside case dimensions were slightly different. 'The Wico and Imperial trackball used the same roller and shafts but since it was a knock off of the Imperial unit Wico made a few changes to prevent being sued by Imperial. When we reached out to Andrew at Twisted Quarter, he gave us this information:
