I have a bicycle (Göricke, circa. 2012) with an unusual stem. It appears to have a quick-release nut which can rotate through a quarter turn.
Here is a picture, with the dust cap removed:
I would like to shorten the stem, but I can't work out how the system works.
Here is what I tried:
- Turned the plastic nut from the 'lock' position to the 'free' position.
- Sprayed WD40 down inside the stem.
- Unscrewed two the metal nuts 4 complete rotations.
- Hit the top of the stem with a soft hammer.
- Wiggled the handlebars with the front wheel secured.
The stem is still stuck fast. Does anyone know how to adjust this thing?
The suggested answers were absolutely correct. The bicycle has a quill stem, but the draw bolt was hidden under a plastic plug which I mistook for a rivet. After loosening the bolt, the stem was easily adjusted (no hammer required!).
The plastic quick release nut was a red herring. I'm still not sure what it's for :)