High-tech ball bearings - ABEC-11 bearings are made of high quality chrome steel.
Dimensions: 7 x 22 x 7mm (inner diameter: 7mm, outer diameter: 22mm, width: 7mm)
Material : Chrome steel (GCr15) Inner & outer rings + Silicon nitride (Si3N4) 6 balls
The 11 is part of the ABEC bearing system and determines how much resistance the bearing has. The higher the number, the longer it takes for the bearing to stop. When looking for a set of bearings, you should consider the quality of the bearing components. Bearings consist of balls, cages and bearing shell. The main difference between quality bearings and cheap imitations is the material used for the bearing shell. Bearings made of chromium steel are much cheaper than those made of carbon steel, which lose a lot of running performance under pressure and become much slower.