Joined: Nov 2006
Posts: 19,810
Likes: 597
From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
I like them. In general I take a dim view of all those crazy Shimano innovations, but biopace is a good one. Sheldon Brown said you could even use biopace rings with an IGH or single speed, but I did not find that to be the case. So I don't use them much, since I don't like derailleurs much. If anyone has a really big 110 BCD ring, like 62T or something, please let me know... that's what I need for my recumbent.