Join Date: Aug 2007
Location: Northampton, MA
Bikes: Iron Monkey: a junkyard steel 26" slick-tired city bike. Grey Fox: A Trek 7x00 frame, painted, with everything built, from spokes up. Jet Jaguar: A 92 Cannondale R900 frame, powder coated matte black with red and aluminum highlights.
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I suggest an 23-tooth granny gear to a 23-tooth Sturmey-Archer hub in low gear. That gives you a ratio of 3:1.
Good luck staying upright.
(I'm joking, of course, but I just realized that that setup would give you a huge range for three speeds: 3:1, 1:1, 1:3. Huh. It might make sense to approximate that. So, yeah, go visit a local store and see what they advise, since they know the local terrain better than anyone on the Internet.)