6 years ago
#5 Quote
Discussion for ABEC Ratings

The higher the ABEC Rating the more round a bearing's inner ring is which means it will roll smoother. However, that doesn't mean that it is more durable. Durability, is attributed to many factors, especially the bearing's seal, and the material used for the rings and ball bearings.

ABEC 1 is .0075mm out of roundness
ABEC 3 is .005mm out of roundness
ABEC 5 is .0035mm out of roundness
ABEC 7 is .0025mm out of roundness
ABEC 9 is .0012mm out of roundness
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Bruce Leggett
SkateMob Team