The Brompton has a stiff hinge and a stiff hinge clamp. I am hoping it just needs a little oil but I will be getting advice from Cycle Surgery when I next peddle by.
Flick of light chain oil into the hinge (it seeps in more easily than wet lube) and a smudge of lithium grease on the clamp screw along with a thin smear on the inside of the clamp does it for me. Just flap the hinge and turn the screw in and out a few times, then wipe off any excess. :-D
Comments