Originally Posted by
jgedwa
In my limited experience with BioPace on FG, this only becomes a relavent issue with larger rings. I think Sheldon ran smaller rings when he used BP rings, so it was never an issue. With a large ring, it can make for a chain that will unnerve you sometimes. I have never thrown one, but it certainly looks possible.
That's a good point. Using a 10% deviation in chainring diameter, I figure the chain path varies close to 5 mm for a 48T chainring and under 2 mm for a 32T ring. Maybe everybody could get along on the whole biopace thing if they just experimented with smaller chainrings.