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Old 07-01-11, 06:51 AM   #1
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Crank arm fixing bolt falling off

I've installed a new 6700 Ultegra triple crank on my bike a few weeks ago, everything went fine then after finishing my first long ride with it I saw the crank arm fixing bolt missing so I put a new one and when I was on the trainer it came off again.
Nothing else on the crankset or BB seems loose or have any funny play, I am aware that crank arm fixing bolts are suppose to be hand tightened.
What am I doing wrong........
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Old 07-01-11, 06:58 AM   #2
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Are you talking about the plastic preload bolt? once the preload has been set, and the 2 pinch bolts done up, this bolt should stay in place, mine has done a few thousand Km since last refitted, and is still there. if you mean the pinch bolts, these do have a torque rating (12-14Nm). the specs with torque rating are here
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