Specialized S-Works Allez Di
Some may consider it a waste to put Shimano's Dura-Ace Di2 electronic shifting components on an aluminum frame. In truth, it’s up to the rider to decide if this quality of component offsets the weight of aluminum. There are so many lightweight carbon fiber parts on this bike, however, that the frame is the only reason the S-Works Allez Di2 can be classified as an aluminum bike (this is the only reason that this bike is not rated as our top best pick). Besides the aluminum frame, every other part is of the highest grade and advanced materials available. By producing this bike, Specialized provides competition to the most elite carbon fiber bikes at a lower price.