>>1383897>You can't 'trackstand' on a geared bikeTrack bicycles, having no freewheel, together with a sloped straight
away, make this easier than on the road, but once mastered, the art is
done equally well on road bicycles on level ground. Experts do it
no-hands, sitting, motionlessly... on a road bike.
Jobst Brandt <jbrandt@hpl.
hp.com>
The essence of a no-handed track stand is to use the rider's polar
moment of inertia against which to shift the CG. Moving one pound a
given distance off center at the shoulders causes the same torque
about the tire contact line as moving that weight at the feet except
that the polar moment of inertia about the axis of rotation (the tire
contact line) is greatly different by the square of the height above
the ground. Moving ones foot out quickly causes little change in body
position while moving ones head causes the rest of the body to move
and thereby not appreciably changing location of the CG over the line
of balance. Moving the hips also causes a change in CG and can be
done so subtly that superficially no motion is apparent.
This effect is natural for many is noticeable while attempting to ride
on a lane marking stripe on the road. Most riders automatically stick
out a knee (or even a leg without cleats). The response to control
balance is easy while sensing impending tilt before it exceeds
correctability is difficult, requiring sensitivity that most people
do not have.
Jobst Brandt <jbrandt@hpl.
hp.com>
god he would have made a great /n/ poster
