In terms of rider comfort, the new 2014 Synapse Carbon is the most comfortable endurance road bike we’ve ever ridden. To quote Road.cc, they said
This is a bike you really can ride all day and finish feeling fresh. Even during some of my faster and more taxing routes the Synapse left me feeling less battered than I have felt on many other bikes.
Synapse is a very versatile bike as well, borrowing technology from all across Cannondale’s wide range of bicycles to give you the performance you want out of a road bike without the penalty of a harsh ride. Having ridden one for a few months, I’ll say that the bike’s stability in rough conditions is a feature you didn’t know you were missing.
One area where the Synapse really shone is in its general handling in a wide range of situations. The 100cm wheelbase, longer than a race bike’s, gave the Synapse great stability at all speeds. That, combined with the frame’s ability to squash high frequency vibrations lends the Synapse fantastic smoothness and fluidity when descending fast and bumpy downhills.
Endurance road bikes is one of the hottest phrases in cycling right now, up there with disc brakes and aerodynamics. There are a couple of interesting contenders, established bikes like the Trek Domane, Specialized Roubaix and BMC GranFondo, along with newer bikes like the Bianchi Infinito CV, that compete in the same sector as the new Synapse. Against such competition the Synapse stands up well.
Read the thorough review of the Synapse Carbon 3 Ultegra here: http://road.cc/content/review/100210-cannondale-synapse-carbon-3-ultegra