The reason cranks brake at that point is that the whole pedal-crank interface is a poor design. I don't think I can explain this any better than Jobst Brandt, so I will just link to his posts and his solution. https://www.sheldonbrown.com/brandt/breaking-cranks.html https://yarchive.net/bike/crank_break.html
And no, this has nothing to do with overtightening. The washer also doesn't make much of a difference.
The reason cranks brake at that point is that the whole pedal-crank interface is a poor design.
Exactly. There's no reason not to choose alu cranks. Choose alu cranks that aren't shit.
@waterlaz started
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The reason cranks brake at that point is that the whole pedal-crank interface is a poor design.
I don't think I can explain this any better than Jobst Brandt, so I will just link to his posts and his solution.
https://www.sheldonbrown.com/brandt/breaking-cranks.html
https://yarchive.net/bike/crank_break.html
And no, this has nothing to do with overtightening. The washer also doesn't make much of a difference.