Aire Velo Bearings range of headset bearings covers the majority of bikes available on the market today. They are available with various different angle chamfers and usually come either as a 45/45 or 36/45.
Although the industry usually refers to the size of headset bearings as 1.1/8 or 1.1/2 the actual dimensions of the bearings are metric. If you are having difficulty identifying your bearing you can find a helpful diagram on our explanation page. There can be one headset bearing which has have the same inner dimension & outer dimension with up to 3 or 4 different heights in some instances.
Our headset bearings are also available in hybrid ceramic though at the minute we only offer the most popular sizes. We also offer the loose balls in steel, stainless steel and ceramic (Si3N4) which can be found on a separate page.