My Superior Series "K" parts list dated Jan 1, 1926 lists front Disc Wheel part number 342661 and rear Disc Wheel 342662. Why there's a different number for front and rear are a mystery to me. The list also denotes all part numbers carried over from the previous models with an asterisks and this has none, which indicates the 4 lug wheel is only used on Superior K up to 01-01-1926.
This may not be entirely true, as the July 1 1940 parts list shows the 4 lug wheel part number 353138 is used on Superior K, V. Whatever made the difference between front and rear apparently was superseded with one wheel and one new part number.
All the old photos I've seen of closed model 1924s show 6 lug disc wheels. Does anyone have any data on when the 6 lug wheel was re-introduced and on which model? Has anyone found any differences in a front and rear 4 lug wheel?
Roger