What I call scuttle shake is different than speed shimmy or frame whip.
It's the torsional flex that is inherent in some large frames, and can be rider induced regardless of speed. If you throw the bars back and forth quickly, does the frame flex in the longitudinal plane? My Mercian has it... the Hetchins, Cinelli, and Singer... don't.
Can't explain it better than that.
============================================ Mark Petry 206 618 9642 mpetry@bainbridgeisland.net Beautiful Bainbridge Island, WA ============================================
The difference between genius and stupidity is that genius has limits
Albert Einstein
============================================
> 'Round these-here parts, we've always referred to it as "front-end shimmy"
> or "speed shimmy". Never heard no mention as to no "scuttle shake"
before.
>
> Aldo Ross
> These-Here Parts, Ohio
>
> ----- Original Message -----
> From: <REClassicBikes@aol.com>
> To: <classicrendezvous@bikelist.org>
> Sent: Thursday, September 06, 2001 3:20 AM
> Subject: [CR]What is "scuttle shake?"
>
>
> > As the title says, what is "scuttle shake"? Is that an Americanism that
> has
> > not reached us yet. The harmonic oscillation of the front of a frame is
> know
> > as a "speed wobble" in the UK. Sometimes as "tank slapping", but that is
> an
> > obvious reference to motors.
> >
> > Regards
> > Martin Coopland