Originally Posted by
caloso
Vintage Trek 520 frame, for example.
Not a good conversion candidate, imho. It's a great geared tourer, so why not leave it that way? It's a lot cheaper to get a new bike with reasonable geometry than to acquire and convert an older, sought-after 520 that fetches a mint on eBay. I love conversions, but prefer to do them on lower-end bike boom bikes that have that wonderful blend of good geometry and lousy components.