Knocking sound???



P

Prometheus7

Guest
I have a knocking sound coming from my drivetrain when it is under stress up
a hill and I'm going slow, 9 - 10 mph. I can't pin it down. It doesn't
happen freewheeling, just when pedaling. It is not a cyclical knock, but
rather irratic. I have Ultegra components. Anyone heard this. Someone
said it could be a loose cassette, but we check that. Other thoughts? 5000
miles on the equipment.

Thanks,

David
 
Prometheus7 wrote:
> I have a knocking sound coming from my drivetrain when it is under
> stress up a hill and I'm going slow, 9 - 10 mph. I can't pin it
> down. It doesn't happen freewheeling, just when pedaling. It is not
> a cyclical knock, but rather irratic. I have Ultegra components.
> Anyone heard this. Someone said it could be a loose cassette, but we
> check that. Other thoughts? 5000 miles on the equipment.

Knock-knock.

Who's there?

9-10.

9-10 who?

9-10 mph uphill is SLOW?

Bill "worn out chain starting to skip?" S.
 
"Prometheus7" <[email protected]> wrote in message
news:[email protected]...
> I have a knocking sound coming from my drivetrain when it is under stress
up
> a hill and I'm going slow, 9 - 10 mph. I can't pin it down. It doesn't
> happen freewheeling, just when pedaling. It is not a cyclical knock, but
> rather irratic. I have Ultegra components. Anyone heard this. Someone
> said it could be a loose cassette, but we check that. Other thoughts?
5000
> miles on the equipment.

BB. Remove it, clean it, the BB threads on the shell and cartridge, grease
it all up real nice, and put it all back together. If you have 5K on the
equip and you've never done this or had it done before, then... wow. You've
done well.

Pretty sure that'll fix the knock.
--
Marty
 
Prometheus7 wrote:
> I have a knocking sound coming from my drivetrain when it is under
> stress up a hill and I'm going slow, 9 - 10 mph. I can't pin it down. It
> doesn't happen freewheeling, just when pedaling. It is not a cyclical
> knock, but rather irratic. I have Ultegra components. Anyone heard this.
> Someone said it could be a loose cassette, but we check that. Other
> thoughts? 5000 miles on the equipment.
> Thanks,
> David



No instant fix ideas, but you have the idea by eliminating things. If
you can temporarily switch out a rear wheel and the sound stays the
same... you've eliminated one possible source. You continue this way and
reference the following 2 articles for help:

<http://www.chainreaction.com/noises.htm>

<http://www.parktool.com/repair_help/creaking_and_squeaking.shtml>

another thing to try is see if it happens only seated or when
standing..... to help eliminate saddle rail interface and seat
post/clamp interface.



--
 
First thing you should do is see if the crank bolts are loose.

If not, do that BB fix already described. Although if you have an Ultegra that
has been properly installed, it shouldn't knock or complain even after 5K
miles. Perhaps it just came a bit loose. The cheaper cartridge BBs on the other
hand aint good for much. I think they are made of plastic, chalk and hope.

Robert
 
david-<< I have a knocking sound coming from my drivetrain when it is under
stress up
a hill and I'm going slow, 9 - 10 mph. I can't pin it down. It doesn't
happen freewheeling, just when pedaling. >><BR><BR>

Loose or not enough grease in the BB shell and left cup, or the BB is history.

Loose cogset.

Pedal noise.

Chainring loose.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"
 
On 28 May 2004 09:51:38 -0700, [email protected] (g.daniels) may have
said:

>it's toast. throw it off a cliff!

Toast should not be flung off a cliff. Toast is flung in a darkened
room pursuant to the utterance of the cue phrase during the dinner
scene.

This message is brought to you as a public service by the Committee to
Obfuscate Normality by Furthering Usefully Spurious Eccentricity.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.
 
On Fri, 28 May 2004 17:08:15 GMT, Werehatrack
<[email protected]> wrote:
>On 28 May 2004 09:51:38 -0700, [email protected] (g.daniels) may have
>said:
>>it's toast. throw it off a cliff!
>
>Toast should not be flung off a cliff. Toast is flung in a darkened
>room pursuant to the utterance of the cue phrase during the dinner
>scene.

Be careful in that darkened room. Make sure you're armed with a grue
gun.

>This message is brought to you as a public service by the Committee to
>Obfuscate Normality by Furthering Usefully Spurious Eccentricity.

Does CONFUSE have an address to which I can write to join up?
--
Rick Onanian
 
Rick Onanian <[email protected]> wrote:
> Be careful in that darkened room. Make sure you're armed with a grue
> gun.

did i mention i'm a huge infocom fan?

>up
You have moved into a dark place.
It is pitch black. You are likely to be eaten by a grue.

>wait
Oh, no! You have walked into the slavering fangs of a lurking grue!

**** You have died ****

Now, let's take a look here... Well, you probably deserve another chance. I
can't quite fix you up completely, but you can't have everything.

Forest
This is a forest, with trees in all directions. To the east, there appears to
be sunlight.

>
--
david reuteler
[email protected]
 
On 28 May 2004 21:34:27 GMT, David Reuteler <[email protected]>
wrote:
>Rick Onanian <[email protected]> wrote:
>> Be careful in that darkened room. Make sure you're armed with a grue
>> gun.
>
>did i mention i'm a huge infocom fan?

I wonder if there's a program to run those games on Palm PDAs.
--
Rick Onanian
 
On 28 May 2004 22:14:20 GMT, David Reuteler <[email protected]>
wrote:
>n my unix box. i grabbed the infocom zcode files from an activision cd-rom
>tho i think most of them are free now. i can't get to google or i'd tell
>ya where.

If I spend long enough searching my old CD-Rs and floppies, the
infocom zcode files (and a bunch of others too) will turn up, as
well as players for a few different operating systems...
--
Rick Onanian
 
>I have a knocking sound coming from my drivetrain when it is under stress up
>a hill and I'm going slow, 9 - 10 mph. I can't pin it down. It doesn't
>happen freewheeling, just when pedaling. It is not a cyclical knock, but
>rather irratic. I have Ultegra components. Anyone heard this. Someone
>said it could be a loose cassette, but we check that. Other thoughts? 5000
>miles on the equipment.
>
>Thanks,
>
>David

In the years I worked in bicycle repair shops, the knocking sound you
describe was always caused by a tight or frozen chain link.
 
adamyork wrote:
> >I have a knocking sound coming from my drivetrain when it is under
> >stress up a hill and I'm going slow, 9 - 10 mph. I can't pin it down.
> >It doesn't happen freewheeling, just when pedaling. It is not a
> >cyclical knock, but rather irratic. I have Ultegra components. Anyone
> >heard this. Someone said it could be a loose cassette, but we check
> >that. Other thoughts? 5000 miles on the equipment.
> >
> >Thanks,
> >
> >David
> In the years I worked in bicycle repair shops, the knocking sound you
> describe was always caused by a tight or frozen chain link.



The knocking sound may be a frame fault if you are riding Aluminium....

Something inside the frame may have busted and only clunks when under
pressure.... going up hills and clunks is a new sympton of frame fault
according to my local dealer....

GIOS & ANCHOR frames are main offenders... don't always blame the
components...

Maybe worth investigating.....



--
 
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