Brompton owners

That'd make sense. I'll investigate....

ETA:
Today's activities:

1) Remove the Brompification handlebar clamp and try to measure the width of the jaw - difficult as it has asymmetric legs and they have a radius with no definitive edge to measure from.

2) Place same clamp in 3" vice (the 5" one is somewhere under the stairs and I can't be arsed) and using a 450mm tommy bar, crush the clamp in the vice to try and reduce the width of the jaw. Using my digi-verniers, I may have reduced the width by 0.3mm. Or by nothing.

3) Replace clamp on bike and go for a ride which reveals reduced, but still-present chitter.

4) Dig out original Brompton clamp from storage, fit to bike, go for a ride which ascertains there is no audible reduction in chitter.

5) Remove Brompton clamp from bike, measure the width of the jaw and put it in the crusher.

6) Re-fit crushed Brompton clamp to bike, go for a ride which ascertains there is no further audible reduction to chitter. It is reduced, but it is still there.

7) Decide to re-fit Brompification clamp, and supplement it with MkI inner tube (see above) as this seems to be the only way I can achieve a chitter-free ride.

I can't help but think that there is a correlation between chitter manifesting itself, and the wearing-away of the powdercoat from the mating surfaces of the hinge - giving it a
metal-on-metal scenario - which on a three year old bike, which has hardly seen any use other than the occasional weekend - is probably about right.

Unless, of course, anyone has any better ideas.

Dinokiddo are in Canada, NOV in South Korea..

Twins. Ordered an telescopic black seatpost and then i thin it's done.

1 Attachment

what tyres are those on the brompton please?

https://dinokiddo.me/shop/wheels/velotto-fantome-mini-racing-tire-for-brompton-%E7%99%BD%E9%82%8A%E8%83%8E/

Dinokiddo are in Canada, NOV in South Korea..

Okay I should be clearer, do you have the link to NOV that I can order directly from?

That's possibly the single biggest improvement I can get for the Brompton!

https://dinokiddo.me/product-category/nov/

£56 thought! @cornelius_blackfoot said he got his directly from Korea.

magnetic clamps and levers
http://www.novdesignstore.com/category/nov-easy-shell-clamps-lever/112/

Saw this:

Strongly recommend you to use with nov Hinge Clamps Lever series.

yep, you have to buy the levers as well..

thanks. i wonder if they last longer than kojaks.

They're pretty thick (re: heavy) but the compound feels really soft. I rarely use the Brompton anymore so I was more concerned with looks than practicality.

That make sense, I still used the Brompton standard tyres as I do a small amount of mileages a day to not get punctured (abet chain is now worn beyond 0.5 after 6 months riding).

Fellow bromptoneers I have a standard seatpost in my brommie and I really need a telescopic one. Is this an easy swap ?

Thanx
Zedric

Yep, beyond simple

Where can I buy etc.

Edit - sourced.

Do I go black 🤔

What colour is your frame?

Black, but with silver bits. Didn't opt for stealth version which I'm regretting.

ta! @diable

Do I go black

Once you go ,,,, etc etc.

I can't help but think that there is a correlation between chitter manifesting itself, and the wearing-away of the powdercoat from the mating surfaces of the hinge

I'd agree, and therefore conclude it's probably ok, but it seems to manifests itself beyond an acceptable level considering your involvement and experimenting in trying to sort it out. Frame is guaranteed five 5 years, why not claim a new one?
If the crushing of the Brompton clamp had sorted it I would have also said the same, you shouldn't have to rectify the clamp opening along with the age of the frame, that's not what the design is intended for: the tapered contact surfaces between the hinge and the clamp should take care of any surface wear, like the (normal) loss of prefer coating in some area of the hinge.

The fact that the inner tube trick works is weird. And because introducing a spacer in the closed hinge seems to work, could it be that the hinge's spindle needs replacing as it maybe the thing that (if out of alignment maybe?) prevents a good contact in the closed hinge?

😂

Unfortunately, I was wrong.
Inner tube band on, clamp surfaces greased - and the chitter is still there!!!!!!
It is starting to do my head in.
The latest evidence would point to the sound coming from somewhere other than the stem hinge and clamp.
AAAAAARRRRRRRRRRGGGGGGGGGGGGHHHHHHHHHHHH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!