Originally Posted by BostonFixed
re: Biopace
Actually, no. Biopace was designed that two opposing sides of the ring would always be in contact with the chain, thus giving equal chain tension. The more oblong side of the ring would me in contact with the less oblong side of the chainring, thus creating equal tension at all times.
Biopace was (is?) a good idea for low rpm grunting, such a hill climbs on a SS MTB, But not so good for fast RPM spining.(>90 RPM)
I have no experience myself, but Sheldon Brown does dismiss the cadence issue at the link I posted.