812 spec Michelin Pilot Sport 4S now in the US! | FerrariChat

812 spec Michelin Pilot Sport 4S now in the US!

Discussion in 'F12/812' started by Il Co-Pilota, Mar 10, 2020.

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  1. Il Co-Pilota

    Il Co-Pilota F1 Veteran

    May 29, 2019
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    Hopefully some place nice.
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    A.B
    #1 Il Co-Pilota, Mar 10, 2020
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  2. Hex

    Hex Karting

    May 1, 2009
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    #2 Hex, Mar 10, 2020
    Beautiful! Thanks man.
     
    Il Co-Pilota likes this.
  3. kansas488

    kansas488 Karting
    Silver Subscribed

    Jan 29, 2014
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    Kansas
    #3 kansas488, Mar 10, 2020
    I bought a set and put them on my 812. Love the look of them and so far, so good!
     
  4. Mike Chawla

    Mike Chawla Karting

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    #4 Mike Chawla, Mar 10, 2020
    wow that's incredible news, I have now the possibility to upgrade to 21 with Michelin!
     
  5. Nospinzone

    Nospinzone F1 Veteran

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    #5 Nospinzone, Mar 10, 2020
  6. Il Co-Pilota

    Il Co-Pilota F1 Veteran

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    #6 Il Co-Pilota, Mar 10, 2020
    If you want to run 21", you should use 285/30R21 and 325/30R21, rather than 275/30R21. Same if you want to do a 20/21 combo. Use 285 in the front. If you go with the 325 in the rear but use 275 in the front, you will get additional understeer, and that's no fun in a sportscar.
     
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  7. Mike Chawla

    Mike Chawla Karting

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    #7 Mike Chawla, Mar 11, 2020
    thats new info i didnt realise 325/30 would fit and not rub, this is good news! are you sure 285 in the front wont rub?
     
  8. Il Co-Pilota

    Il Co-Pilota F1 Veteran

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    #8 Il Co-Pilota, Mar 11, 2020
    Well people have run 335/25R22 section in the rears, so 325/30R21 should not pose a problem. Also, 325/30R21 has the same diameter of 28.7" as the OE, so all it needs is a bit more room in the width department.

    Regarding the 285. It's not much bigger than the OE 275. If memory serves, there's quite a bit of room around the tyres. Also remember that there's room to use spacers. Diameter wise, the 285 is not much bigger than the OE.

    But let's break it down a bit.
    Fronts first.


    The OE MPS4S has a section width of 11.2" mounted on 10" wide wheels. Diameter is 27.6".
    285/35R20 has a section width of 11.4" mounted on 10" wide wheels, so 2.6 mm of room is needed. Diameter is 27.9" so 4mm is needed.

    Rears are as follows.
    OE MPS4S has a section width of 12.8" mounted on 11.5" wide wheels. Diameter is 28.7".
    325/30R21 has a section width of 13" mounted on 11.5" wide wheels. Diameter is 28.7".

    So going by that, I think it's pretty safe to say that it will work. One could of course run the OE 275 fronts with the 325 rears, so that's an option too.
     
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  9. Mike Chawla

    Mike Chawla Karting

    Dec 9, 2018
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    #9 Mike Chawla, Mar 11, 2020
    thanks very much, usually i think about tire weight and wheel weights etc but one will not worry about weight and its handling with the v12 :)
     

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