Cannondale Synapse Hi-Mod Shimano Dura-Ace Di2 Disc Road Bike 2019, Size 56cm Posted July 14, 2023 Cannondale Synapse Hi-Mod Shimano Dura-Ace Di2 Disc Road Bike 2019, Size 56cmAs far as endurance road bikes go, the Cannondale Synapse Hi-Mod Dura-Ace Di2 Disc is simply unbeatable. Medium (5’6-5’11) View our in-depth size guide here. Cannondale Hollowgram SiSL, 50/34t – 170mm.