I was in the LBS today looking for some smaller rings for the bike I'm setting up as a touring rig and in the used box of parts pulled out a Stronglight 390 crankset. The cranks themselves are nothing that spectacular and they're 170 mm which is what I use.

http://tinyurl.com/2bhlrhv

But attached to the arms were some oblong (aka biopace style) rings that had a 48-48t count. The inner one said Stronglight on it. I wasn't aware that Stronglight made these oblong chainrings. Does anyone have some info on them? Velobase is lacking for this style.

"Unfortunately" I'm going to have to go back and buy the crankset from the shop owner - just too intriguing.

Scott