Originally Posted by
cyccommute
That’s probably 22” total length. I agree that it looks more like a 19” (49cm) than a 21” (53 to 54 cm). The length of the seat tube should be measured from the middle of the bottom bracket to the middle of the top tube. I think the owner is measuring from the middle of the bottom bracket to the top of the seat collar.
Maybe. I thought that because of the oversize tubing..."
The 19" has the top tube intercept the down tube, so only the down tube connects with the head tube. The 21" size has both top tube and down tube smushed against each other at the head tube junction."