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Old 10-18-06, 11:06 AM
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Bikes: Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo

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Originally Posted by hackybiker
Can I use a regular socket wrench to remove the crank arms off the bottom bracket? Or do I need a special tool?

This is on an 80s Fuji with a standard square bottom bracket, arms seem to be held by a hex bolt.
The hex bolt provides a clamping force to keep the arm tightly pressed onto the square taper BB spindle, but once the hex bolt is removed, the crank arm will still be firmly pressed onto the spindle.

You need a crank extractor tool to remove it: The crank extractor threads into the large threads that surround the hex bolt, and literally pushes the spindle away from the crank to remove it. Be careful to thread the extractor in straight and all the way. A crank with stripped extractor threads is no fun
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