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Thread: Hub distorted!?

  1. #1
    Caesium's Avatar
    My BM is fixed!

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    Hub distorted!?

    Long story short, warped a set of discs within 2 months so bought a new set of Brembos.
    Fitted them today but when I spin the wheel I got this (watch video)

    http://www.youtube.com/watch?v=uNfbLCqVhm8

    1 Wheel seems to be catching on the pads when I spin it pointing to distortion of the hub?
    The bearings are fine, no play at all.
    Chris

    The problem with common sense, is that its not that common.

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  3. #2
    Caesium's Avatar
    My BM is fixed!

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    UPDATE:

    Took off the disc and checked the hub for run-out:
    http://www.youtube.com/watch?v=sJvrweb7QiY

    Basically nothing.

    then fitted the disc on a totally clean hub that I ran the sander over to remove all traces of rust and got this:

    http://www.youtube.com/watch?v=x8B2B3bPYJw

    .20mm of run out on brand new brembo discs.

    I'm at a loss.
    Chris

    The problem with common sense, is that its not that common.

    See my images @
    http://www.christianfrench.co.uk

    Own a dreaded BMW? http://www.bmw-sport.net

  4. #3
    Broken Byzan's Avatar
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    Can you position the disc in a different position to see if it improves per chance?

    Or is it one of the grub screw mounted jobbies

  5. #4
    Caesium's Avatar
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    grub screw jobbie, although I could move it and bolt it back on
    Chris

    The problem with common sense, is that its not that common.

    See my images @
    http://www.christianfrench.co.uk

    Own a dreaded BMW? http://www.bmw-sport.net

  6. #5
    Broken Byzan's Avatar
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    for gits and shiggles it has to be worth a try to see if you can improve upon it

  7. #6
    Caesium's Avatar
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    Moved the disc to several different positions, same run out at some place on the disc each time (marker pen helped)

    2 sets of out of spec discs from 2 different retailers, what's the chance of that?!

    I'm going to go and look at an A6 LeMans next week.
    Chris

    The problem with common sense, is that its not that common.

    See my images @
    http://www.christianfrench.co.uk

    Own a dreaded BMW? http://www.bmw-sport.net

 

 

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