Originally Posted by KillerBeagle

Pardon a noobish question but what exactly is meant by a "compact double"?

I have a Stronglight 93 52/38 that I'm thinking of dropping to 50/38. It can't go any lower than 38 with 122 BCP, but I got around Germany and Luxembourg with it okay with a 14-28 freewheel back in the early 80s.