The GMC Yukon XL 700C 14-Speed Road Bike is built around a lightweight aluminum 6061 road bike frame and Shimano tourney 14-speed gearing. The bike features high-profile Vitesse aluminum rims that look as good as they perform, and a Vitesse racing saddle with an alloy seat post for a smooth ride. Lastly, Shimano STI shifters and an alloy crank set round out this sturdy road racing cycle.