The other day, I attempted to install my Stronglight BB and crankset and ran into an issue I was hoping to get some help with (this is my first time doing this type of work, bear with me.)

The BB install went smoothly, but when installing the driveside crank, I ended up snapping the bolt. I couldn't find my torque wrench (I have found it since, though) and went with some internet guidance of "tight as #$%@", which ended up being too tight.

The thing that kept me tightening was the amount of taper showing behind the crank arm, which looked to be too much in my uninformed opinion.



Compared to the non-driveside



But looking at the gap between the recessed area of the crank and the end of the taper, it looks correct (again, to my uninformed eye)



This is a standard Stronglight 118 spindle, by the way. One thing I'm not sure of is whether I installed the spindle in the correct orientation, as the guide I was following didn't make mention of the fact that it's asymmetrical. I did get the snapped bolt out though, so all is not lost (as long as I didn't damage the taper or crank in the process ).