The cannondale synapse hi mod disc ultegra di2 road bike 2017 is the perfect balance of raw power and all day ridability with a race proven combination of endurance geometry light weight and road smoothing comfort winning just about every prize available along the way the flattened and helixed shapes of the rear stays allow them to flex absorbing shocks and keeping the wheel tracking smoothly over bumps complete with a seatpost and seat tube system that deflect together for improved