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I've been looking at many different wheel posts and pics on the forum lately and I've noticed something about the aftermarket rotors (particularly slotted and x-drilled). In some instances the slots and hole pattern will be in this direction "...\..." and in other cases they will be in this direction ".../...". Why is that?? I guess after putting my rotors on not too long ago, I just want to make sure they're correct.
The vanes allow the rotors to pump air, like a centrifugal compressor. The air enters around the hub and is pumped outward. The part of the vanes that you see on the O.D. of the rotors does not "grab" the air.
the direction does matter. however, the correct direction depends on the manufacturer. there should be a marking on the rotor that indicates the correct direction of rotation.
sportbrakes and baer are different in terms of the direction of their slots and holes. both are installed correctly though. it depends on the brand
Last edited by Icemanskis; Sep 28, 2005 at 04:30 PM.