> From: "John Everett" <jeverett@wwa.com>
> From a distance of more
> than ten years, I can't now recall that I found shifting between a
> round inner ring and a BioPace outer to be at all disconcerting.
>
> It wasn't much later that I bought a set of round 52/42 rings and
> haven't ridden with the BioPace rings since. Now that I'm a
> "seasoned" cyclist I sometimes think of putting the old rings on
> one of my bikes just to see how I feel about them now.
I still have a bike with a 52T bio-pace ring and a 39T round ring. The bigger Bio-pace rings were much rounder than the small rings, and as a result, there was very little effect on shifting, and I really can't tell the difference between Bio-pace and round when I switch between bikes. If anyone is interested, I have an article on Bio-pace rings clipped from an old issue of Bicycle Guide. IIRC, they were indeed intended for (and tested on) riders with low pedaling cadences. BTW, I still have the 42T (or was it 39T?) Bio-pace ring in a box somewhere, just in case they have suddenly become valuable! :-)
Steve Kurt
somewhere in the grey midwest