Originally Posted by
titani
I want to do both. On weekdays I do short rides 20-40. Yet I am shooting for a century. Maybe I am asking for too much.
Then you need to get the more comfortable bike. I've done a metric century on a track bike and unless your Quasimodo (or extremely flexible) then riding in the aero position for 4+ hours is not very nice.
Maybe ask the LBS if they can recommend some tweaks to the Synapse (i.e. a more appropriate stem) that you can change over to make it more racy when needed?