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Thread: M2 rotor specs

  1. #1
    Junior Member
    Join Date
    Jan 2010
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    Does anyone know the specs for the front and rear rotors off a 99 M2 Cyclone? I'm looking for:
    Outside Diameter,
    Inside Diameter,
    Distance from inside edge of mounting hole to inside edge of bolt hole,
    Bolthole diameter,
    Thickness,
    Offset

    Thanks.

  2. #2
    Senior Member toolmaker98's Avatar
    Join Date
    Dec 2011
    Location
    North east indiana
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    140
    I have a new front rotor. If I remember I will bring home my dial calipers on Monday and measure it.

    What measurement are you looking for, don't quite understand what you are looking for.

    "Distance from inside edge of mounting hole to inside edge of bolt hole"?

  3. #3
    Junior Member
    Join Date
    Jan 2010
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    2

    Sorry for the delay, I had some issues uploading the picture. Here's a better explanation of what I need. I attached an image of the rear rotor and added labels for the dimensions that I'm looking for.
    A: Inside diameter
    B: Outside diameter
    C: Bolt hole diameter
    D: I think this is the easiest way determine the bolt hole placement,D : D = A + E + C/2
    E: Distance from inside edge of mounting hole to inside edge of bolt hole
    Thickness
    Offset

  4. #4
    Senior Member toolmaker98's Avatar
    Join Date
    Dec 2011
    Location
    North east indiana
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    140
    That's ok. Remembered to bring my calipers home tonight. These are the dimensions for a front rotor for a s3, part number ( my book says) 45166-00y.
    Hope this helps. Are you making your own rotor?
    A.) 2.380 diameter
    B.) 13.380 diameter
    C.) .331 diameter
    D.) 3.251 bolt circle diameter ( 5 holes)
    E.) .270
    Thickness of where pads contact .195
    Offset from where rotor contacts rim to inside of rotor where pads make contact .230



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