The hills in Vermont have grown steeper in the 25 years or so that I have been frequenting Bike Forums--something to do with the road crews not maintaining the grades properly, I think--so I have lately been reshuffling some of my gearing. One of my solutions is a very nice half-step and granny setup that gives me an acceptable high, nice even steps, and a maximally low low while still staying within the 34-tooth total capacity of a Suntour Cyclone RD and a reasonable 16-tooth drop from the middle ring to the granny.

The only problem is that it requires both a 27-tooth freewheel cog and a 27-tooth, 5-bolt 74 BCD inner chainring. I already have the necessary Suntour 27-tooth cog, but a desultory internet search hasn't turned up any 27-tooth chainrings. Did anyone ever make such a thing? If not I will sadly lower my expectations and sadly return to the gear calculator.