Originally Posted by
alcjphil
What sort of defect would prevent a 700c wheel from fitting a frame that is designed for that size wheel? What part of the rear triangle is too short?
Most likely defect is the wrong word here. These are build as super tight frames for 700c wheels, and odds are that the issue isn't that 700c wheels won't fit, but that they'll fit only with tires smaller than 25mm (or less).
If you search for a photo of the frame or bike, you'll see the near zero clearance behind the seat tube, which is cut away to follw the curve of the wheel, with no room to spare.