ABEC stands for Annular Bearing Engineering Council and it is a rating of how good bearings are. Basically the higher the number after ABEC-, the better the bearing is supposed to be. The scale goes ABEC-1, ABEC-3, ABEC-5, ABEC-7 and ABEC-9. Bones Bearings (Swiss, Ceramic) are Skate Rated and are basically better than most of the bearings rated on the ABEC scale.
Sometimes the higher the number doesnt mean anything. You can get some ABEC3 that are just as good as ACEC 7. Like REDS for instance there like 13 dollars and they perform and last just as long as a pair that costs like 25 dollars.
