Originally Posted by
photogravity
I was not "confusing frames built for upright riding and less upright riding". I was instead using a comparison that had some differences as noted by you and hamster.
You were replying with numbers from a drop-bar bike to the size that was for an upright bike.
Originally Posted by
photogravity
I just measured the frame on my
Cannondale Quick CX Rigid (a modern upright bar bicycle) and it has a 20-1/2" seattube so, yes, that frame is a little shorter than that of my roadbikes. It is
my opinion and some others here that the bicycle that the OP mentions in the other forum is too small for him.
It's too small for him
if he doesn't want to ride with an upright posture.
I suspect that the typical rider for the Quick is more likely to prefer a less upright position than the typical rider for the Trek 7.2.
Originally Posted by
photogravity
As with anything, you can install longer or shorter stems, get zero-setback or long-setback seatposts, high-rise stems, etc. to make other adjustments to fine-tune the top tube length. I have never bothered to measure the effective top-tube length of any bicycle I have bought because for me if the seattube is in the ballpark the rest will fall in place.
That's nice but the horizontal top-tube length is the important measurement. The seat-tube length is next to useless (you can't use it to compare the size of different models).