The right crank and chainrings are made out of billet and are therefore one piece, without any chainring bolts. [/IMG]
Good illustration of how far CNC machine work has come even in just 10 years. They are terribly crude next to current Rotor 3D cranks. Not that cutting cranks from billet is a good idea, it's only for people without the resources which Shimano has to make very advanced forgings.
Good illustration of how far CNC machine work has come even in just 10 years. They are terribly crude next to current Rotor 3D cranks. Not that cutting cranks from billet is a good idea, it's only for people without the resources which Shimano has to make very advanced forgings.