To be honest (in case this didn't come across clearly in my post above) I really don't bother, I was merely wondering whether those "oval" things are a second try at selling people wonky chainrings - as has been done what, twenty years ago? with "Biopace".
Thanks man.
To be honest (in case this didn't come across clearly in my post above) I really don't bother, I was merely wondering whether those "oval" things are a second try at selling people wonky chainrings - as has been done what, twenty years ago? with "Biopace".