Originally Posted by
fietsbob
that was not the implication I was reading from your OP.
Fwiw, when I got a 3rd hand Brompton Mk2, the slipping down while I rode was the issue ..
A new,plastic frame shim was part of the cure, then I bought a new +6cm seatpost,
then, from the LBS, I bought a second QR, one with its own band clamp.
they are made to go on top of seat tubes of frames having the same diameter as the B seat post,
so the band has a lip on the edge.
I removed that lip so the band slides over the the seatpost upside down , and grips the seatpost itself.
it sits atop the frame , when riding..
As I already mentioned, I did say "safe way"... so it's not like I'm asking if I should grease it or whatever. One of the more annoying part of folding/unfolding is having the seatpost catch and needing to spend another few seconds (it adds up) to jiggle and free it.
It would simply make the folding experience "better" if there was a simple way to get the post to slide down on its own, even if it does so very slowly.