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Old 03-25-09, 02:49 PM
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elTwitcho
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Originally Posted by pyroguy_3
Could somebody explain how overtightening can ruin the arms? Can it deform the metal? Or is it more a matter of stripping out the spindle?
It can cause the crank itself to crack at the taper. Like this

http://pardo.net/pardo/bike/pic/fail/FAIL-005.html

You'd have to put a lot of torque into tightening it, but it's not totally uncommon.
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