- Outer diameter: 44 mm (1.73 inches)
- Inner diameter: 22 mm (0.92 inches)
- Width (inc housing): 15 mm (0.59 inches)
this bearing is usually on the bottom the markings on this bearing are 320/22. The inner size is 22mm and the outer when the bearing is in the bearing cup is 44mm.There is also a bearing with a 23mm inner and a 22mm inner but they all have the same outer size to fit in the same pit bike frame. Some pit bikes use the 22mm on the bottom and some use the 23mm, most pit bikes use the 22mm inner for the top of the steering stem.
PLEASE CHECK MEASUREMENTS TO MAKE SURE IT FITS YOURS BEFORE THE PURCHASE !