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PostPosted: Mon Apr 17, 2017 3:01 pm 
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Joined: Mon Jun 06, 2016 8:45 am
Posts: 542
Hi,
Looking for some help!
My front Corima has started to creak and I just can't find out why.
It happens when you load up the wheel a bit, and more and more as you put your weight over the front.
Kind of like a bearing noise, but the bearings seem fine, run smoothly, and there is no play in them.
I re glued the tubular tyre, thinking maybe it wasn't down properly, but no help there either.
Then I taped up the valve stem so it can't move, but no, nothing there either.

I'm wondering if maybe a spoke became unbonded from the rim, but they all seem tight.

I know it's the wheel as when I swap for another....silence!

Any ideas welcome!
Thanks

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Posted: Mon Apr 17, 2017 3:01 pm 


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PostPosted: Mon Apr 17, 2017 4:49 pm 
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Joined: Thu Jul 19, 2012 6:09 pm
Posts: 889
Location: Loveland, CO
Change the quick release and retest. Just to rule it out.


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PostPosted: Mon Apr 17, 2017 4:55 pm 
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Appreciate the good reply, but tested the 2nd wheel with same QR and all was quiet.

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PostPosted: Mon Apr 17, 2017 5:14 pm 
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Location: Loveland, CO
Could you reproduce the noise by squeezing on the spokes? Since the noise is generated by loading up the wheel, the likely culprit is where the spokes enter the hub or the rim. You might be able to track down the exact spike that is making the noise.


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PostPosted: Mon Apr 17, 2017 8:57 pm 
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Yeah, tried that too, and it does seem the most likely explanation, that a spoke has somehow become unbonded, either at the hub or the rim, but as much as I squeeze them in all directions they all seem rigid and well connected.

I even turned myself into a human wheelbarrow and 'rode' the wheel across the lounge floor to try and load up the axle, but still no noise.

The wheel spins smoothly, quietly and perfectly true in my hands too, it's very odd.

Gripping the wheel firmly and banging it on the ground (tyre first!) all seems strong and rigid.

I've written to Corima asking their opinion, and I'm taking the bike into an LBS tomorrow to see what they think...

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PostPosted: Mon Apr 17, 2017 10:09 pm 
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Location: The land of Oz
Could you perhaps set up on rollers and have a second person try and locate the noise while you ride? Like a car on a dyno tuner..........

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PostPosted: Thu Apr 20, 2017 9:38 am 
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Well, just to update, the noise has gone!
All a bit of mystery really.
Took it to the LBS, and they first tried a different QR. No change.
Then the mechanic took it for a spin and confirmed the noise but wasn't sure where it was coming from.
Although there was no play in the headset, he tensioned it some more.
After that, seemed maybe a bit better, but noise still there. Rode home 4km.
Later that day, set off for ride.....noise gone.
All very odd.
Possibly the QR wasn't tight enough, or maybe something wasn't quite right in the headset...not sure, but it's nice to have a quiet bike back!

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Posted: Thu Apr 20, 2017 9:38 am 


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