bio pace!
damn. I didn't know this was the 1980s technology forum!
I would think that you would want to go with the small ring. however, i don't think it would be to good of an idea because the difference in chain tension could be damaging to the chain itself and throw the chain off if you get the rpm's up.
biopace....damn are transformers on?
I know some people that swear by biopace.