Brompton seatpost sticking

In article <[email hidden]>,

Quoted message said:

Dear all,

The seatpost on my partner's well used Brompton is becoming
increasingly difficult to raise and lower.

I'm assuming greasing it would not be an answer as the steel post
slides within a plastic collar, and you wouldn't want the mess anyway.

I'm considering using some metal polish to clean the post up a bit in
the hope that it will help.

Does anyone have any tips for helping it to slide better?

Thanks in advance!

The Brompton owner's manual is very specific and says you must NEVER use
lubricant on the seat pillar. I keep mine shiny and grease free with an
occasional wipe with methylated spirit on a cloth. Metal polish would
presumably be ok if it is really dirty.

--
Bob Cox. Stoke Gifford, near Bristol, UK.
http://pippin.co.uk/

Thanks for that Bob, I'll give that a go!

The post is probably more exposed than most as the bike is without
mudguards so receives spray from the rear wheel.

I think it requires more regular cleaning than it has done so far!!

Cheers,

Nick

Quoted message said:

Dear all,

The seatpost on my partner's well used Brompton is becoming
increasingly difficult to raise and lower.

I'm assuming greasing it would not be an answer as the steel post
slides within a plastic collar, and you wouldn't want the mess anyway.

I'm considering using some metal polish to clean the post up a bit in
the hope that it will help.

Does anyone have any tips for helping it to slide better?

Thanks in advance!

Swap with my seatpost ;-)

I have the opposite problem. The saddle stays up fine when I'm riding
the bike (unless I have to brake very hard) but drops down if I'm
pushing the bike by the saddle.

I suspect in my case the plastic collar is worn as the seatpost wobbles
slightly when it is fully extended and I suspect that it is this
wobbling that causes it to slowly sink down when I'm pushing by the
saddle.

Tim.

In article <[email hidden]>

Quoted message said:

Quoted message said:

Dear all,

The seatpost on my partner's well used Brompton is becoming
increasingly difficult to raise and lower.

I'm assuming greasing it would not be an answer as the steel post
slides within a plastic collar, and you wouldn't want the mess anyway.

I'm considering using some metal polish to clean the post up a bit in
the hope that it will help.

Does anyone have any tips for helping it to slide better?

Thanks in advance!

Swap with my seatpost ;-)

I have the opposite problem. The saddle stays up fine when I'm riding
the bike (unless I have to brake very hard) but drops down if I'm
pushing the bike by the saddle.

I suspect in my case the plastic collar is worn as the seatpost wobbles
slightly when it is fully extended and I suspect that it is this
wobbling that causes it to slowly sink down when I'm pushing by the
saddle.

Could you shim it with a thin bit of metal around the outside of the
bush? I made a seatpost shim from a catfood tin that works well.

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Dear all,

The seatpost on my partner's well used Brompton is becoming
increasingly difficult to raise and lower.

I'm assuming greasing it would not be an answer as the steel post
slides within a plastic collar, and you wouldn't want the mess anyway.

I'm considering using some metal polish to clean the post up a bit in
the hope that it will help.

Does anyone have any tips for helping it to slide better?

Thanks in advance!

Cheers,

Nick

I had a similar problem on other folding bike and I found the seatpost to be
slightly bent.