Originally Posted by
steve sumner
Nesteel, if your Campy crank gets hairline cracks at the spider/arm
interface all you do is file them away adding a radius to the area and
the cracks won't return.
I'm aware of how to deal with the cracks. You need to file the entire crack out, or they'll come back. However, there is a limit to how much you can file before the crank arm is junk. If a previous owner let the crack get out of hand, they will in fact be wall art.
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My bikes: '81 Trek 957, '83 Trek 720, '85 Trek 500, '85 Trek 770, '81 Merckx, '85 Centurion Cinelli, '85 Raleigh Portage, '92 RB-2, '09 Bianchi