I think I'm pretty good at adjusting RDs, but maybe not perfect, so some bikes have them. My Gazelle no, but my mtb drop bar conversion, yes, as with the Cannondale ST-400 I am putting northroad bars on for my wife.
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"