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Where does the Woosh, Woosh Sound come from during Sprints(13 posts)

Where does the Woosh, Woosh Sound come from during Sprintsbimini
Oct 7, 2003 9:56 AM
The question below about wheel stiffness got me thinking about this. Love that sound during sprints, but not sure where it comes from or if that sound is an indication of loss of power efficiency. I know the harder I pound the louder it gets. I also listen for the other bikes at the end of the race, when I here the woosh, woosh, woosh I know it time to let the clutch out and give it everything.

Is it changes in wheel speed, changes in bike speed, flexing of spokes, bike, etc. I really don't know?
Bikes going by on both sides (nm)Cory
Oct 7, 2003 10:07 AM
LoL! nmSpunout
Oct 7, 2003 10:27 AM
Ouch, that hurtsbimini
Oct 7, 2003 12:45 PM
Sometimes true though when I race Masters. The old folks know how to maintain things so that there is a lot of juice left in the tank and thier position is right for the sprint.

In Cat 5s I can hold my own. (at worst getting just a single woosh when they pass on just one side)
re: Where does the Woosh, Woosh Sound come from during SprintsFredrico
Oct 7, 2003 10:23 AM
Well for old guys, Cory's right!

It's the sound of the tires squishing side-to-side on the road as the rider accelerates in a huge gear. Notice how it's always the same rhythm as the rider's cadence?
Wheels flexing all the way to a brake pad (nm)spluti
Oct 7, 2003 10:24 AM
from all the Nike cycling shoes of course! nmClydeTri
Oct 7, 2003 10:58 AM
from Aarontoy breaking the sound barrier? (nm)ColnagoFE
Oct 7, 2003 12:16 PM
He was with us so briefly, but will never be forgotten. (nm)TNSquared
Oct 7, 2003 12:44 PM
tires, actuallycyclopathic
Oct 7, 2003 12:19 PM
flexing and loosing traction in contact points.

THere would be no or very little sound if you could apply constant force. Since it isn't possible, changes in force temporary overflex tire and change the geometry of contact patch. Woosh Woosh Woosh, your tire is getting eatten by pave.
I second the tire theory... or third (nm)funknuggets
Oct 7, 2003 1:21 PM
Yes, it's the tires (4th and deciding vote!) (nm)Kerry Irons
Oct 7, 2003 4:54 PM
The wind through the spokes?MShaw
Oct 7, 2003 2:04 PM
The whooshing is probably those little fan blades we call spokes thrashing through the wind faster.

Its not just sprints, but every time the pack accelerates hard.