Dear MRoe,
I do not think that a loose bolt 373 could be beneficial for mentioned behaviour.
You must have overlooked that there is already a part present which overtakes the task to supply sideways play of the bottom tube for folding - that is the cup spring 363.
Would you generate additional play via a loose bolt 373 then you will get too much play and the frame tubes would not any longer hold together in folded position.
The following facts are speaking moreover that definitely for a tight bolt 373:
- There is a torque given - 18 Nm - and this means anyway tight.
- Original spare part 373 bolts are supplied by the factory with thread locker - nobody (not even Ming cycle
) would do that on a bolt which is intended to be loose.
http://www.koreamtb.co.kr/shop/item.php?it_id=1503020955
https://stridacanada.ca/product/strida-rear-hinge-upgrade-kit/ - Would you like to use the bolt 373 to generate additional play then you had to connect the bolt’s hand securely to the frame.
You recognized that obviously yourself while writing;
but such connection is not existent on a Strida.