This is due in part to its Full Dura-Ace Di2 electric component group. This innovative technology provides instant/precision shifting from both the front and rear. Plus, the dual-control levers allow for smooth, quiet gear changes. Included also is a Giant Contact SLR composite handlebar and stem, as well as a featherweight Zipp 404 wheelset. The SL 0 is built for both casual riding AND serious, professional-level racing from the Spring Classics to the Tour de France. All of the components have been specially designed with the handling, weight, stiffness, and layout all optimized for winning.
