Hi, i have found this web it's in french but intereting : new type of crank to improve Power:claime to inprove power by 30 to 40 watts with a lower HR 5 to 6 beats 
Devinci-Pro Race Team VTT ( triple 680 euro), road :chain ring 28/37=43/53 www.proraceeurope.fr/Orbit.html . Jolie, non?
Devinci-Pro Race Team VTT ( triple 680 euro), road :chain ring 28/37=43/53 www.proraceeurope.fr/Orbit.html . Jolie, non? 
