25.4 and 26.4 are the seat post sizes and they are proper fits as nearly as I can tell. Not liking the Old School saddle clamp assembly I opted to buy a new indexed alloy seat post for my recent restoration (I know that the bike is not really restored, more upgraded now than anything) and the size is 25.4...



I fitted an on hand 26.4 seat post into the all chrome bike and the fit was just right. I did, however have to do a bit of work to get the seat lug gap spread. The gap had been tightened down to zero, making it impossible to properly clamp the seat post, which, as found, was too small to begin with. I will most likely use the on hand alloy/indexed post even though it is neither period or model correct.

I do plan a full over haul, cleaning and polishing of the chrome bike and Torpado #3 is already close to stripped down to bare frame (head set and bottom bracket still installed. I will (if I remember to do so) weigh them both. In truth, I really don't worry too much about weight, considering the not light weight weight of the rider (200+ pounds).