I am puzzled what is "Click image for larger version. 

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If that is an old rotor that has been cleaned, recut and modified, perhaps removing that much material from the hub could be risky. I could be a new, cheap rotor that is being re-cut But cannot know from the video what is really happening.

There is money to be made doing modifications to cheap parts. $20.55 vs $150.00.
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Don't even get me started on ridiculous tire/wheel/vehicle combinations for street use.
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It is one thing if you are really a racer and know the advantages and disadvantages of modifications and after market modifications, tt is quite an other to just have too much money to spend one expensive parts than actually make your vehicle less safe on real roads. Few guys on the street have any clue how changing tire profiles affects their suspension and handling.

Real race cars use real tires and wheels.
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But I digress...
Too bad the "professional filmers" cannot spell.

I know, I may not be one to mention proper "speeling" as I often make mistakes also. But I also don't mind being corrected.

"Bad speelers of the world, untie!!"