Originally Posted by
Bad Lag
I'll chime in, too, because this is a serious safety concern.
That hairline crack can easily lead to a broken crank arm. Of course, they break when under heavy load and can easily land you on the street in an intersection with other vehicular traffic accelerating all around you.
I now return you to your regularly scheduled programming.
note of course the dark region, lurking to propagate and the black at the LH edge of the fracture plane AND at the stamping.
an ounce of prevention…
It took Campagnolo a long time to redesign this arm, they added material and went to more sophisticatedly CNC machining about the trouble point, these cranks have the ‘
‘no flute” arms and laser etched logo. 1983, just before the intro of Corsa Record. Probably after the death of Tullio to be implemented, noting the 50th anniversary group avoided machined fluting too.