Zipp 404 hub sound - something wrong?

Discuss light weight issues concerning road bikes & parts.
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canbakay
Posts: 455
Joined: Sun Oct 31, 2010 10:54 pm
Location: London

by canbakay

Hey all, Im pretty sure the answer is here! This is my first zipp wheelset so i am new to the brand, theres a sound coming from the rear hub, very difficult to explain so i put it on youtube. Its the whistling sound in the background and can't be heard while riding. I know the video shows it being spun fast but it also happens when its much slower.

Thanks for the help!!

http://www.youtube.com/watch?v=m0lzoM0aYY0

Mr.Gib
Posts: 3067
Joined: Fri Mar 18, 2005 4:12 pm
Location: eh?

by Mr.Gib

Sounds like harmonic resonance likely related to specific spoke tension and alignment. Of course when you are on the bike the wheel is loaded and the acoustic properties are altered. There is nothing wrong with your wheel (other than it is not a tubular).
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.

by Weenie


thisisatest
Shop Owner
Posts: 1980
Joined: Sat Jun 13, 2009 4:02 am
Location: NoVA/DC

by thisisatest

i believe ive heard it with every 188 rear hub since they came out. dont know the exact cause, but ive never heard it while riding. my guess would be spoke harmonics caused by the frequency of the pawls/ratchet. as mr.gib said, loading the wheel would alter the frequency of the spokes.
it's normal.

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CharlesM
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Location: Phoenix Arizona

by CharlesM

normal

Robroyski
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Joined: Tue Dec 07, 2010 7:33 am
Location: Canada

by Robroyski

Sounds like a wheel spinning to me. Nothing unusual.

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canbakay
Posts: 455
Joined: Sun Oct 31, 2010 10:54 pm
Location: London

by canbakay

thanks a lot fellas, i'll sleep better now!

by Weenie


kophinos
Posts: 17
Joined: Fri Aug 26, 2011 9:49 am

by kophinos

my 202s make the same sound. the first time i heard it i thought it was my cellphone...

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