You have to use a long allen key to tighten the bolt within the stem, so it's not easy to put a lot of torque into it.
So i'm tightening as much as i can, no spinning at all, not stuck seems to work perfectly except not tightening enough.
I can move bars adrift from alignment with the wheel with a small amount of force after tightening it as hard as possible.
It's an Ultegra quill stem.
You have to use a long allen key to tighten the bolt within the stem, so it's not easy to put a lot of torque into it.
So i'm tightening as much as i can, no spinning at all, not stuck seems to work perfectly except not tightening enough.
I can move bars adrift from alignment with the wheel with a small amount of force after tightening it as hard as possible.