I have a Specialize Expedition, produced about 1984 - with mostly original parts. It's a glorious heavy touring bike.
It has half-step gearing, and because I am getting older, I need to re-gear it once again. Previously, I retained the middle chainring and put
it on the outside (top gear chainring), then replaced the old middle chainring with a smaller gear (yet retaining the half-step). Then, I replaced the granny chainring with a smaller gear.

Currently, the gearing is:

Chainrings:

44-40-24

Cogs on freewheel:

13-16-17-20-24-28

Can you guide me to a freewheel produced to make the freewheel something like (and retaining my half-step + granny arrangement):

14-16-20-24-28-34

I am not particularly interested in the "megarange" freewheel," because I would like a more fluid transition, not a huge jump to a 34: I believe the mega is 14-16-18-21-24-34.

Will my short-reach derailer be able to handle this gearing?


Will my current Sedis chain work?


Will front derailer work?

suntour mountech
super champion wheel (36 spoke)
specialized hub
friction shifting (original - on down tube)

I have a photo of the freewheel if this would help.