More broken cranks under 000.html.
[http://www.drzhor.wz.cz/klika/klika2.jpg]
[http://www.drzhor.wz.cz/klika/klika3.jpg]
Tioga Revolver crank. Note: the cranks are of welded steel.
Pictures from http://www.drzhor.wz.cz/klika/klika.htm as of 2003/09/11. The only comment is ``Zlomen TIOGA REVOLVER - KLIKA ZA 300 USD :)''.
Note the Tioga Revolver is generally similar to the Bullseye. The Revolver uses a 17mm spindle; the above crank broke at the non-splined end, where the crank was welded to the spindle. Contributing factors probably include a combination of highest loads (greatest leverage) and being in the heat-affected zone from welding. Without closer examination it is not possible to determine the deeper nature of the failure.
See also FAIL-005.html.