Ask ScooterDad: whats difference between abec7 and abec 9

Submitter's Name: 
avery lavergne
Submitter's Location: 
montclair,new jersey
Answer: 

ABEC is a rating scale for the quality of bearings. In theory, the higher the ABEC rating, the smoother and faster bearings should be. Unfortunately, this isn't always true. You can find cheap ABEC 9 bearings that aren't a good as good quality ABEC 5 or 7 bearings. You can find more information here: https://en.wikipedia.org/wiki/ABEC_scale