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Abec 11 Bearings

: Spruce Skateboard Bearing, ABEC-9/ABEC-11????【 DESICATED MODE Skateboard Bearing 】: ABEC-11 carbon steel bearings.  JDYYICZ ABEC-9 608-RS Skateboard Longboard Bearings Premium Inline Skate Bearings Roller….  Spruce ABEC-9/ABEC-11 Precision Bearings suitable for use in such applications as skateboards, inline skates, and Talk:ABEC scale - WikipediaHi, is 9 indeed the highest class on the ABEC scale? I can't find such an information on the Websites listed as References and I know that there are shops which sells so called ABEC11 bearings