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Bigger Discs, Standard Calipers?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by mjr901, Nov 7, 2012.

  1. mjr901
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    mjr901 Parts Manager - (Main Dealer)

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    [Nov 7, 2012]
    I've got standard 18 inch Rotor Alloys (S3 2012)

    Can I put bigger discs (bigger than 345mm) on the front? is there room with 18's? + will the caliper accommodate it?

    I want to fill the wheel with shiny j hooked discs! :)
    #1
  2. Ash187
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    Ash187 Audi-Retrofits.co.uk Site Sponsor VCDS Map User

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    [Nov 7, 2012]
    i think you will find the carrier wont be able to cover any bigger size on the disks... you will probably have to go 4 pot callipers
    #2
  3. mjr901
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    mjr901 Parts Manager - (Main Dealer)

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    [Nov 7, 2012]
    I realise that the pad will not cover the entire area on with bigger discs and standard calipers.

    + It actually doesn't matter, I'll have better heatsink and more breaking 'leverage' (marginal yes).

    If I just slammed some 360mm on would the caliper just not fit round? or some of the pad not be on the disc?
    #3
  4. MartayMcFly
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    MartayMcFly Booooooost Regional Rep VCDS Map User

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    [Nov 7, 2012]
    My 362mm discs and R8 calipers fit inside the standard wheel, though they need spaced to clear the spokes. It's tight, but they fit.
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  5. MartayMcFly
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    MartayMcFly Booooooost Regional Rep VCDS Map User

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    [Nov 7, 2012]
    Not my image, but the same caliper

    [​IMG]
    #5
  6. mjr901
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    mjr901 Parts Manager - (Main Dealer)

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    [Nov 7, 2012]
    If I put S3 Calipers up to those 362mm will that work?
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  7. mjr901
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    mjr901 Parts Manager - (Main Dealer)

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    [Nov 7, 2012]
    Jeeze that's well close!
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  8. MartayMcFly
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    MartayMcFly Booooooost Regional Rep VCDS Map User

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    [Nov 7, 2012]
    You see the little black spacer between the caliper and carrier? That's probably an 8mm spacer, you'd need a 20mm? You'd also get all kinds of uneven wear on the disc. I guess it would work in theory, but I'm not exactly an authority on the subject.
    #8
  9. martinivw
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    martinivw :)

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    [Nov 7, 2012]
    s3 disc is 345 the AP ones in pic are 362,
    so 362mm-345mm =17mm therefore a spacer of 8.5mm would be needed ;)
    #9
  10. MartayMcFly
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    MartayMcFly Booooooost Regional Rep VCDS Map User

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    [Nov 7, 2012]
    I'm not 100% a spacer would even work with the standard carriers (aren't they built into the caliper?). I also forgot you half it, since it's +18mm diameter, not radius.
    #10
  11. Turbo jay
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    Turbo jay Leather repair specialist

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    [Nov 7, 2012]
    your not kidding, wow that is close lol
    #11
  12. martinivw
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    martinivw :)

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    [Nov 7, 2012]
    im not sure either Marty, & would NOT want to be the Guinea pig trying out anything like that :(
    #12

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