BL> Yes... that is what would happen. The spokes would wind up, and
BL> the resulting force would lift the wheel to its original axle
BL> height (less the bit needed to create the force in the spokes).

RM> Huh??? How do you change a pure twisting force into a lifting
RM> force?

1.  Grab your wife's arm.
2.  Twist.
3.  Observe how she lifts up.
4.  Release and stand *well* back

RM> But this is beside the point: the axle is lower than the
RM> centre. If it isn't low enough to make you happy, I'll just add
RM> more weight.

 The point you can't see (through ignorance, I expect) is that axle
height and circumference are linked, inexorably.

 If you have a wheel/tyre where the tyre can't slip either around the
rim or on the road, then rotation makes linear movement proportional
to axle height, *AND* this linear movement sums up to circumference.
They are the SAME thing.

 If you *FIX* the circumference, then the axle height must also be
constant. The "winding up" force will make it so (less a fraction for
heat loss or whatever). In fact, less air pressure drops the axle
height, and circumference must decrease to allow this. Weight will
have the same effect.

 To measure circumference variations (and speedo variations), all you
have to do is measure axle height variations. To say otherwise is just
STUPID.

 I've been kind to you Roy, explaining this for the fourth or fifth
time, and the subject is now closed.

Regards,
Bob

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