Thank you to everyone who has responded.  I have learned quite a bit about shimmy, nutation, and other forces exerted on a bike since yesterday afternoon.  It is a five month old full ti bike (carbon fork), and I will bring it in to be checked out, but on initial inspection it all looked in order.  It was cold and windy, so that along with the rapid downhill (Rt. 22 heading south toward Cox), could have done it.  The one item I want to be sure about is the carbon fork alignment, per the Calfee findings.

 

Wayne

----- Original Message -----
From: "Full, Kevan"
Date: Monday, March 5, 2007 10:31 am
Subject: RE: [WCCChat] Front Wheel Wobble
To: WCCChat@yahoogroups.com

> If I might take a different direction here...
>
> There might not be anything wrong with your front wheel; high speed
> wobble is not all that uncommon to occur in road bikes. What
> causes the
> bike to wobble, madly at times, can be a host of reasons,
> leading up to
> rider themselves being the problem. Certainly the wheel being
> out of
> true could be the cause, but it's likely you would notice that problem
> at slower speeds too. You didn't mention that in your email so I'm
> thinking it's not the root to your problem. But there's
> certainly no
> harm in having your bike looked at by your shop. Here's what
> you do if
> it ever happens again: go into a coast, position your feet and pedals
> at the 3 and 9 o'clock position and press both your knees firmly
> againstthe bike's top tube, the shuddering will stop. It's as
> simple as that.
> Check to make sure your tire pressure is up and that your wheels are
> properly seated in their dropouts too.
>
> The wobble can be caused by rider tension which isn't too
> difficult to
> consider when one is hurtling down some hillside at neck-
> breaking speed,
> concerned about ice or pot holes and such. Add to that scene a gusty
> day and the rider is straining to keep the bike seemingly under
> controland is instead sending a signal through the frame that
> causes it to
> wobble. Try to relax and remember to use your knees if it ever
> presentsitself again.
>
> Kevan
>
> _____
>
> From: WCCChat@yahoogroups.com [mailto:WCCChat@yahoogroups.com]
> On Behalf
> Of boupie6
> Sent: Sunday, March 04, 2007 4:33 PM
> To: WCCChat@yahoogroups.com
> Subject: [WCCChat] Front Wheel Wobble
>
>
>
> Has anyone experienced a serious case of front wheel wobble
> while at
> high speed (usually downhill)? And if so, have you found a fix
> to the
> problem?
>
> Thanks,
> Wayne
>
>
>
>
>