Giant Propel Advanced SL Carbon Road Bike Shimano Ultegra Di2 XL 2015 Posted January 8, 2024 Giant Propel Advanced SL Carbon Road Bike Shimano Ultegra Di2 XL 2015Carbon Reynolds/ Easton wheelset. Shifters: Shimano Ultegra 6870. Rear Derailleur: Shimano Ultegra 6870. Front Derailleur: Shimano Ultegra 6870. Crankset: Shimano Ultegra 6800 (50:34 ratio, 175mm crank arm length).