verktyg
Stronglight 118BB Spindle Old Style
This front side view shows that the spindle has extended all of the way up to the bolt shoulder.
The crankarm can not be tightened.
The aluminum in crankarms is malleable and will stretch with repeated installation and removal. Also from overtightening.
Riding on a loose crankarm can also contribute to this problem.
In this case, it's an old crankarm that's been stretched plus a spindle with a square that's a little too long (manufacturing tolerances).
Stronglight 118BB Spindle Old Style
This front side view shows that the spindle has extended all of the way up to the bolt shoulder.
The crankarm can not be tightened.
The aluminum in crankarms is malleable and will stretch with repeated installation and removal. Also from overtightening.
Riding on a loose crankarm can also contribute to this problem.
In this case, it's an old crankarm that's been stretched plus a spindle with a square that's a little too long (manufacturing tolerances).