Retrobike is the World's #1 site dedicated to vintage, retro and classic mountain bikes, road bikes & BMXs.
http://www.retrobike.co.uk/
Vintage, Retro, Classic MTB forum on MTBR.com
http://forums.mtbr.com/forumdisplay.php?f=39
Catalogue heaven
http://www.mtb-kataloge.de/
Polish catalogue heaven
http://retromtb.pl/katalogi.htm
BikePro Buyer's Guide, an intensive compendium of bicycle part information with compatibility, manufacture process and quality and reviews of products.
http://www.bikepro.com/
