OK, I just went and measured the 3 bikes I have. As shown in your 1st picture, from the front frame to rear upright, shows approximately 9 1/2"; on all 3 of mine measure 13". Can you post a picture of the complete frame with a tape measure from the front of the frame to the rear drop outs? I'd like to know if your frame is shorter, which does not look to be the case. Your rear vertical bars appear to be right under the seat spring, same as mine.