Originally Posted by metropical

I measured the OEM San Marco, 125mm. My buddy, whom I bought the CAAD from originally, has moved to a Giant Fleet 145.
Maybe that is the issue, that i was measured for a 175mm seat bone, but perhaps I'm used to narrower and need more cushion and the cut out rather than what is "correct" for my measurement.
Trek only stocks Trek. Hence the need to seek out an LBS even if it ain't so local.
That and the idea of a less acute and perhaps shorter stem than 85mm.
Surprised to see that 50, 90 and 110 mm seem to be very popular, at least at Modern Bike.