Shimano tried it with Biopace.
I've just realised how old I am - apparently they stopped making them in '93!
Nice one, @Cyclopathic !Are they any good on a fixie?
My first ever quality b ike.Bought from Drakes Cycles of Harehills Leeds 8.Had 105 with Biopace.That was around 1988-1990.Little did know then what i actually had.I took the bike to the local tip.Numpty.It was a Raleigh Triathalon 25" frame.I've got a 105 biopace chainset down my cellar. I was using it a couple of years ago