Whirring sound while descending
02-26-10, 11:03 PM
#1
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Thread Starter
Whirring sound while descending
I randomly hear an annoying whizzing sound like my rear brake suddenly drags, or maybe tire rubbing the stays? I cannot spend too much time searching where the sound originates from...only because I'm coasting downhill at 35-40mph. What could it be? Anyone wants to fathom a guess?
Bike: Cannondale CAAD 9
Wheels: Mavic Ksyrium SSC SL3
Gruppo: Shimano Ultegra 6600
Bike: Cannondale CAAD 9
Wheels: Mavic Ksyrium SSC SL3
Gruppo: Shimano Ultegra 6600
02-26-10, 11:10 PM
#2
LBKA (formerly punkncat)
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Sure its coming from the bike itself, or maybe a zipper, flap/tie on your seat bag, helmet strap, etc?
02-26-10, 11:18 PM
#4
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02-26-10, 11:54 PM
#7
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My wheel cartridges have the primers in place, powder packed, and are ready to go.
Just try to pull in front of me. Go ahead. You'll think whirring.
Just try to pull in front of me. Go ahead. You'll think whirring.
02-27-10, 12:01 AM
#8
Hills hurt.. Couches kill
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02-27-10, 09:06 AM
#9
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Could just be the wind blowing through the wheels at a certain angle.
02-27-10, 11:39 AM
#11
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I randomly hear an annoying whizzing sound like my rear brake suddenly drags, or maybe tire rubbing the stays? I cannot spend too much time searching where the sound originates from...only because I'm coasting downhill at 35-40mph. What could it be? Anyone wants to fathom a guess?
Bike: Cannondale CAAD 9
Wheels: Mavic Ksyrium SSC SL3
Gruppo: Shimano Ultegra 6600
Bike: Cannondale CAAD 9
Wheels: Mavic Ksyrium SSC SL3
Gruppo: Shimano Ultegra 6600
https://www.youtube.com/watch?v=FzoBe...layer_embedded
https://www.youtube.com/watch?v=n580s...eature=related
Make sure to use Pedro's Road Rage or Mavic OEM mineral oil (Rogue Mechanic and even Mavic specifically state that these are the lubes to use).
Even though lubes like Phil Wood Tenacious Oil are technically approved by Mavic and might silence the noise, they don't seem to work as well because the viscosity is not right and will most likely aid in create drag between the plastic bushing and the rubber gasket (whole other can of worms and problems).
02-27-10, 11:49 AM
#12
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It's the flutter of angels wings as they wait for you to overcook the next turn.
02-27-10, 02:14 PM
#14
Has coddling tendencies.
Serious answer: Do you have any tape at all around your forks or stays? I had a whirring issue and discovered a bit of tape used to hold the computer wire in place around the top of the fork had curled and was rubbing on the tire.
02-27-10, 03:06 PM
#15
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Thread Starter
The cassette rocks quite a bit, since I checked it last. I think its time for a new freehub bushing. Thanks for NAILING IT Kimconyc...BF is da best!
02-27-10, 04:31 PM
#16
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I have had to do this on 2 wheelsets. I actually use something a little thicker and it doesnt cause a problem.... seems more related to dirt and lack of lube? Take it apart, clean the freehub and pawls real good, lube, reassemble. If its happening on the road, normally just a quick revolution of your pedals and re-engaging the pawls always worked for me
02-27-10, 06:03 PM
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Make sure to use Pedro's Road Rage or Mavic OEM mineral oil (Rogue Mechanic and even Mavic specifically state that these are the lubes to use).
Even though lubes like Phil Wood Tenacious Oil are technically approved by Mavic and might silence the noise, they don't seem to work as well because the viscosity is not right and will most likely aid in create drag between the plastic bushing and the rubber gasket (whole other can of worms and problems).
Even though lubes like Phil Wood Tenacious Oil are technically approved by Mavic and might silence the noise, they don't seem to work as well because the viscosity is not right and will most likely aid in create drag between the plastic bushing and the rubber gasket (whole other can of worms and problems).
02-27-10, 06:26 PM
#19
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02-27-10, 07:19 PM
#21
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Put bike on bikestand. Spin cranks FAST and see if you can replicate the sound.
Vibrating helmet straps, at speed, can cause whirring sounds too.
Vibrating helmet straps, at speed, can cause whirring sounds too.
02-27-10, 10:51 PM
#23
Senior Member
Thread Starter
No, guys...its seriously coming from the wheels. Its like a pulsing, whee sound, at speed. I bet its the freehub...
02-28-10, 05:01 PM
#25
Senior Member
Thread Starter
Opened-up the freehub, and it appears the previous owner packed it with GREASE! The bushing is indeed shot...it rocks side-by-side very much. What can explain the gear slippage when I stand on the pedals?