Originally Posted by
merlinextraligh
2lbs lighter made part of the difference, but likely seconds instead of minutes. The aero wheels likely made a minute or two. New toy effect had to be a factor.
But the biggest likely difference is your lower position on the Tarmac, which is not only leading to the time difference, its also likely a big part of your difference in perceived comfort.
+1, though 1cm doesn't make that much of a difference.
although if your position is comparable on both bikes, i do hear that the Tarmac is a bit more aero, at least more aero than a Supersix in wind tunnel tests.
i personally don't produce enough peak watts to notice flexing of any sort on my cooper