![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/3ttt_Ernesto_Colnago_road_bicycle_stem.jpg/640px-3ttt_Ernesto_Colnago_road_bicycle_stem.jpg&w=640&q=50)
Stem (bicycle part)
From Wikipedia, the free encyclopedia
The stem is the component on a bicycle that connects the handlebars to the steerer tube of the bicycle fork. Sometimes called a goose neck,[1] a stem's design belongs to either a quill or threadless system, and each system is compatible with respective headset and fork designs:
- Quill: the stem inserts into the steerer tube, which is threaded and does not extend above the headset.
- Threadless: the stem clamps around the steerer tube, which is not threaded and extends above the headset.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/3ttt_Ernesto_Colnago_road_bicycle_stem.jpg/640px-3ttt_Ernesto_Colnago_road_bicycle_stem.jpg)
classic single-piece type
shown with cable hole