The Cento range gets the Cento Uno SL, a lighter and refined version of the Cento Uno. It was ridden by Team Lampré this year on the Tour de France. The SL is supposed to be 130 gr lighter than the Cento Uno. It weighs in at 920 gr. Cento Uno weight is 1050 gr. There is a special Di2 version to go with Shimano’s electronic Dura Ace component group, featuring internal cable routing. I don’t know about that. I’d prefer monocoque bikes to have no holes in the frame. Preserves structural integrity and stiffness. I count four different Cento Uno models.