They seem to be getting the occasional mention right now and I am wondering if anyone has done any real tests to see if they work better than a conventional chain ring?
My only experience of them was on a bike about 15 years ago. It was an old secondhand bike then so no idea how long they had been around. I did not find any advantage to using them at the time and the bike was passed on to someone else. I rode with him and the only comment I could pass is that he used to throw chains a bit more frequently than to did on his previous bike. I put this down to him keeping pressure on the pedals when changing and with a rear derailler that was constantly moving to keep the chain under tension.
So has any one used the "NEW" bio-pace rings and found them of any advantage over a convential ring?