Originally Posted by
Miele Man
The bad rap that Biopace chainrings got was because a lot of people believed you couldn't spin high roms with them. That was false but it was enough to kill the rings. Biopace may not feel much different in use but they do rduce the stress on the knees by a lot.
Cheers
Totally subjective but I liked them on the granny only. I thought they were easier to climb with a good cadence but round ones easier to spin with the help of momentum from more forward speed.