One question-
If over-tightening the crank bolts can shear the thin inner section of
the disk, how will this design be affected by the stresses of normal
use?
It seems that any weight that the rider places on the rollo disk is
transfered through that thin material. Also, since the center of the
rollo disk will not contact the end of the axel (in most cases), that
weak spot also bears the force needed to keep the crank snugly fastened
to the hub. It seems that even if the force does not immediately shear
the disk there may be enough force to stress the aluminum and result in
a less sudden premature failure.
If I am correct, this could be prevented by thickening the material
slightly, or by providing spacers to fill the gap between the inside
face of the disc, and the end of the axel.
Could this be a valid concern?


--
OneWheelLess

Seriously, the other wheel just fell off one day.
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