I have got this folding problem mezzos. After turning the front wheel and folding the rear wheel under the bike frame, I would release the QR lever on front wheel. Once the front wheel is disengaged, I roll it out to the other side of the bike frame (opposite of rear wheel. now there is problem: I cannot fit the hinge that holds the front wheel into this receptor that is welded on to the frame near the rear derailleur. No matter how hard I push the wheel in, the hinge just refuses to budge. What am I doing wrong? How do you solve this problem?
The receptor is found in this pic right above the RD.