I want to get a freewheel for climbing and I would like recommendations on how large of a granny gear I can get. The RD is a third generation Campagnolo Gran Sport and the chainrings are 50/47 but I am looking for a 49/46 or less if there is such a thing.
This will be a climbing set-up, I will put on the freewheel, chainrings and a different chain if necessary for only certain rides, otherwise my 14-22 is fine for the flats of Illinois.
I thought I have read 28 teeth is the max but that may have been for Nuovo Record. A 32 would even be better for this old man, but I really don't think that is possible. Ideally, 14-18-22-28 would fit the ticket, is this possible?