I don't doubt the quality of bones but as for abec9, abec7 etc, most of them are not abec9, abec7... Abec 9 bearings are used in critical aerospace and instrument applications. There are not many bearing manufacturers in the world that can make Abec 9 as most do not have the equipment and yet you see Abec 9 bearings readily available in skate shops at low prices. A real Abec 9 bearing would cost 30 to 40 US Dollars or more. I leave you to decide!! Have a look at http://www.smbbearings.com/Framesets/Skate_Frame.htm for useful info about skate bearings.
#1 bones Swiss
#2 bones reds
#3 speed demon
#4 blind
#5 abec 9
#6 abec 7
#7 abec 5
#8 abec 3
#9 abec 1
#10 jc (Walmart sold skateboards)
*bones ceramics are much faster than bones Swiss but they can shatter*
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