I push the BB inside a crank hole without any tool but I expect a few milimeters gap.

The Truvativ crank definitely uses JIS interface, but the question is: DOES the gap make any problem? or is it normal?

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If you have correctly tightened the crank bolt then this normal. The recommended torque spec is 305-390 in lbs. If the crank axle came all the way to the end you would run the risk of the bolt bottoming out before the crank was seated.

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  • Thanks, can you elaborate what bottoming out is? – azer89 Mar 27 '15 at 11:10
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    @azer89 - The head of the bolt should tighten against the crank arm, not touching the end of the crank shaft. – Daniel R Hicks Mar 27 '15 at 11:18

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