Buzzy Rims on Mavic Open Pro -- Problem solved

[Simonb]

It turns out that the annoying rattly, buzzy sound was
coming from the pin across the weld coming loose. I drilled
a tiny hole to one side of the pin and squited some UHU in
there. Hung the wheel up overnight so the glue settled and
dried around the pin, and -- hey presto -- silent running
once more.

[Pete Biggs]

Simonb wrote:
> It turns out that the annoying rattly, buzzy sound was
> coming from the pin across the weld coming loose. I
> drilled a tiny hole to one side of the pin and squited
> some UHU in there. Hung the wheel up overnight so the glue
> settled and dried around the pin, and -- hey presto --
> silent running once more.

Could you describe more precisely where you drilled the
hole?

thanks ~PB

[Davo]

YOU drilled a hole in the RIM..........

(Alf Engers Springs to Mind )

I might try that on my COSMICS...they seem to produce a
humming noise also

Just of to get the black & decker... report back later

who know's after this I might get my 1st sub '50' ride

D@vo

the bigger the ring the more it hurts

"Simonb" <sbennett@YOUAREALLHEATHENSwiderworld.co.uk> wrote
in message
news:40dbe48e$0$58815$5a6aecb4@news.aaisp.net.uk...
> It turns out that the annoying rattly, buzzy sound was
> coming from the pin across the weld coming loose. I
> drilled a tiny hole to one side of the pin and squited
> some UHU in there. Hung the wheel up overnight so the glue
> settled and dried around the pin, and -- hey presto --
> silent running once more.

[Pete Biggs]

Davo wrote:
> YOU drilled a hole in the RIM..........

Have you noticed that they already have a few holes drilled
in them? ;-)

~PB

[Simonb]

Pete Biggs wrote:

> Could you describe more precisely where you drilled
> the hole?

Find the weld and notice that either side of it, on the tyre
side, there are the two tips of the pin recessed in two
dimples. I drilled a 2mm hole about 5mm to the side (left as
you look at it with the rim label oriented correctly) around
the rim from either of the dimples. I put quite a lot of
glue in and then bunged the hole to stop it dripping out and
then hung the wheel up to dry. Note that I drilled two
holes: the first one was to the right of the dimples, and it
didn't work -- something inside the rim must have prevented
the glue from getting where it had to go, or the pin was not
loose on that side.

[Simonb]

Davo wrote:
> YOU drilled a hole in the RIM..........

Yes, I put two 2mm holes in the rim from the tyre side. Like
Pete says, the rim has thirty-two 5mm holes in it already
already so I doubt that I've weakened it any.

[Pete Biggs]

Simonb wrote:
> Davo wrote:
>> YOU drilled a hole in the RIM..........
>
> Yes, I put two 2mm holes in the rim from the tyre side.
> Like Pete says, the rim has thirty-two 5mm holes in it
> already already so I doubt that I've weakened it any.

Wot, no valve 'ole? ;-)

- - - - - - - - - - Thank you for the extra detail in
other reply. I might try that if ever I have an OP rim
that's too loud to bear. Usually any clicking or buzzing
is inaudible once up to speed* or out on roads with wind
or traffic.

* Centrifugal force holds the loose bits still.

~PB

[Doki]

Pete Biggs wrote:

> * Centrifugal force holds the loose bits still.

I can hear a thousand physicists screaming :D.

[Pete Biggs]

Doki wrote:
> Pete Biggs wrote:
>
>> * Centrifugal force holds the loose bits still.
>
> I can hear a thousand physicists screaming :D.

Okay dokay doki dookey, *centripetal* force then. Is
that right?

~PB

[Doki]

Pete Biggs wrote:
> Doki wrote:
>> Pete Biggs wrote:
>>
>>> * Centrifugal force holds the loose bits still.
>>
>> I can hear a thousand physicists screaming :D.
>
> Okay dokay doki dookey, *centripetal* force then. Is
> that right?

Centripetal force is the force that pulls whatever you're
spinning towards the centre of the circle. What we think of
as centrifugal force is actually momentum. But I'm not 100%
about all that. I couldn't give a toss...

[Tony Raven]

Doki wrote:
>
>
> What we think of as centrifugal force is actually
> momentum. But I'm not 100% about all that. I couldn't give
> a toss...

Ahem. Force is rate of change of momentum. Ahem. Thank you.

Tony

[Doki]

Tony Raven wrote:
> Doki wrote:
>>
>>
>> What we think of as centrifugal force is actually
>> momentum. But I'm not 100% about all that. I couldn't
>> give a toss...
>
> Ahem. Force is rate of change of momentum. Ahem.
> Thank you.

You're most likely right. I can't be arsed to check and
can't remember much physics. The sensation of whatever it is
your spinning (say a weight on a bit of string) pulling
outwards, is actually the weight trying to carry on in a
straight line due to momentum. I hope.

[Tony W]

"Simon Brooke" <simon@jasmine.org.uk> wrote in message
news:jh1uq1-3de.ln1@gododdin.internal.jasmine.org.uk...
>
> The thousand physicists can scream and scream until they
> are sick. If they have problem with language which
> describes accurately what ordinary people observe in
> everyday life, it's their problem and no-one else's.
>
> What holds the loose bits still is not a centripetal
> force, it's inertia
> - the bits want to fly off but the wheel won't let them,
> so they're pressed up against it. Ordinary people call
> this inertia a centrifugal force. Ordinary people are
> right. Under normal observational conditions,
> centripetal forces are just so much handwaving. What you
> can observe is not a centripetal but on the contrary a
> strong centrifugal force. This may be a by-product of
> inertia, but that doesn't make it less real or less
> observable.
>
> When science has got so refined that it's no longer able
> to describe what happens in normal experience, then it is
> frankly effete and irrelevant.

So what do we do?

In this case centrifugal force is a perfectly reasonable
shorthand for what is happening. Any physicist or engineer
will know what is implied and can translate the popular
description into a real scientific model -- which in this
case is relatively simple and is based on Newton's Laws of
Motion -- a body will continue at a constant velocity (in a
straight line) unless a force acts upon it.

Its not as if centrifugal force is an explanation based on
some form of suspicion and quackery -- such as it was the
little green men that dun it!

T