The headset spacers are a very small component of the bicycle, but at the same time very important. These small rings allow you to raise or lower the height of the stem of your bike and therefore of the entire handlebar and directly affect the way you ride the bike, you can go in a more lying down or upright position.These headset spacers are made of aluminum and are black in color. You can use one or use several to get the ideal height for your handlebars. We offer them in 3 different heights: 5mm, 10mm and 20mm.