The small ring is 20t. So take that for what it's worth. I haven't run the gear calculations in a few years and, unfortunately, the folder I had that in as well as all my other riding related data was lost a while back. I could set up a gear-inch calculation spreadsheet again but don't have the gumption to tackle it at the moment.
I do know the 17t ring was too small and I can still flip the bike backwards on a steep hill with the 20t so that is all I need to know at the moment. If I run out of steam climbing in the lowest gear with the 20t then I'll be walking anyway, I'd just be pedaling faster and going slower with the 17t - not making any headway on time.
