The ABEC Myth | TransWorld SKATEboardingJul 13, 2002 - The ABEC rating system uses odd numbers, ranging from 1 to 9. The higher the number, the tighter the tolerance of the bearing, and thus, the Abec vs. Skate Rated™ - Support - Bones BearingsIn an application like this, an ABEC - 7 or 9 bearing rating may be appropriate. However, a skateboard with 54mm wheels turning 20,000 RPM will be traveling 
Bullseye Bearings ABEC 9 Skateboard  The Bullseye ABEC 9 Bearing. Bearings are circular pieces of steel with flat sides that contain eight lubricated balls, their purpose is to keep wheels running What an ABEC Rating Tells You About Skateboard BearingsJul 22, 2018 - Skateboard bearings often have an ABEC rating that indicates the level of  ABEC 9 and higher bearings would be ridiculous to use in a Abec 9 Skateboard Bearings | Lily BearingAbec-9 has been the highest grade in bearing industry. The Abec 9 rollerblade bearing can be applied to any harsh conditions with high speed requirementsDo ABEC Ratings Matter for Roller Skate Bearings?Jun 16, 2018 - You will see roller skate bearings marketed with all kinds of ABEC ratings: ABEC-1, ABEC-3, ABEC-5, ABEC-7, ABEC-9 and even ABEC-11ABEC scale - WikipediaThe ABEC scale is an industry accepted standard for the tolerances of a ball bearing.  There are five classes from largest to smallest tolerances: 1, 3, 5, 7, 9