Originally Posted by
rseeker
I often see people recommend an 80s or 90s steel Trek (MultiTrack, 830, 850, something like that) but as far as I've seen those are all 26inch and maybe 27.5inch.
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Trek MultiTrack is 700c. As are Schwinn Crosscut, Crisscross, & Crosspoint. Miyata Alumicross, Sportcross & Triplecross. Bianchi Volpe, Advantage, etc. to name a few. You could look for, if you wanted an older steel (or aluminum) bike, the very early hybrids, like above and that others have listed.
29er is just a fatter 700c, as I understand it - someone will correct me if I am wrong of course.