Looks like Trek/Electra no longer makes a 21-speed Townie--is that correct? We've got some pretty steep hills in our town and my wife (she's the one looking for the bike) has had knee surgery (plus we're both senior citizens) so needs the step-thru feature and as easy a peddle uphill as she can get. So, looking for expert advice/opinion on whether the 7-speed Townie has a sufficiently low gear to power her up a Seattle/San Francisco-style hill--and if not, would it be possible to remove the standard derailleur/gear cassette and replace it with 18, 21 or however many gears it might take to make it workable for her? Thanks!
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