Originally Posted by
DrinkSomeWater
I've then taken the bike for a few rides and it stays firm. Sometimes it makes some noise while riding, which I imagine is the two ends of the fold rubbing each other. Probably unavoidable I guess...
Thanks everyone!
It sounds you get micromotion. do you get galling marks on the mating faces on the hinge where they come into compression?
You could try a grease like the parafin suggestion to see if it cures it. I did and it cured but it came back as the grease went. As a permanent fix, I stuck a piece of motorsport anti squeak shim (goes behind the ceramic brake pad and caliper piston). It's made by 3m (anti squeal shim on ebay).
The shim is on one face on the hinge and once under compression, it shapes itself in between the faces and absorb the micromotion.