Originally Posted by
pdedes
If your current ride has you on a 90 mm stem, the shorter stem (70mm) you would need on the bigger bike will compromise handling. I prefer stems in the 110-130 mm range with normal trail for neutral handling.
That's what I was getting at. I ride a 53.5cm top tube with a 110mm stem. My bike actually has a longer reach than his 54.5cm and a 90mm stem. There's no way I'd ride something with a 56.5cm top tube.