How do all,
I've just recently aquired a lovely Peugeot Grand Prix 501 from a fellow forum member and am trying to find out a little about the Biorythm chain rings. They're o-symetrical for those that don't know, but that's about all the info I have!
I'm yet to find any further info using the search feature and Google.
Does anyone know anything about these rings? I've been riding them for 2 weeks now putting I'd say between 10 and 15 miles per day and to be honest I can't tell the difference between them and standard rings...