I got my girlfriend a Citizen Tokyo off Craigslist a while ago to get her into biking. So far she's loving it; we've been on short jaunts in Philadelphia and New York City, and spent all of Labor Day weekend touring around Montreal. The only thing is that she's already spinning out just to keep up with us 700c or 27" folk on the flats. I'm upgrading the tires to Kenda high-PSI 16" tires which should help out a bit, but ultimately she needs better gearing.

Does anyone know where to find a 6-sp freewheel with 11T in the highest gear? I haven't had much luck with google and ebay.

I found other threads here where the Tokyo was upgraded to a 7-sp and the chainrings were swapped out to alleviate the gearing issue, but since this is a once-in-a-while bike I'd rather keep the hassle to a minimum and simply swap out the freewheel.