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Tire Sizes on GT500

Discussion in 'SVT Shelby GT500' started by Kyle Backenstoes, Jan 3, 2019.

  1. Kyle Backenstoes

    Kyle Backenstoes New Member

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    Just got my 2010 GT500 this last year, looking to upgrade wheels very soon to 9.5" fronts, and 11" rears. I would like to run a Toyo R888R 315/30r20 in the rear, and a Toyo R888R 255/35r20 in the front. The rear tire height is 27.4 and the front is 27, making it a 1.5% difference. I've heard from a few people different tire heights on front and rear will cause ABS issues on the car. Has anyone run different tire sizes and ran into issues? I'm fairly new to all of this so just looking for some information on the subject
     
  2. Smm7PT

    Smm7PT Active Member Established Member

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    I’ve got a 13’ GT500 with same tire set up on HRE wheels with 0 problem. Save your money, I’ve driven R888 and R888Rs and really the R888s hook very well. They aren’t that bad in 45-50 degree Ohio weather either, on the occasional rare day the garage queen comes out of hibernation.


    Sent from my iPhone using svtperformance.com
     
  3. biminiLX

    biminiLX never stock Established Member

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    If you’ve got the power go 315/35/20. ABS thing is myth.
    I run 275/35/20 front and 315/35/20 rear.
    Good til about 800rwhp.
    I ran 27” front 30” rear no issues.
    -J
     
  4. Kyle Backenstoes

    Kyle Backenstoes New Member

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    Awesome this is the info I was looking for thanks guys!
     
  5. merkyworks

    merkyworks Active Member Established Member

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    I'm running Front 20x10 with 285/35/20 and rear 20x11 with 315/35/20, no issues at all with ABS.

    More info on my setup if you like, HERE.
     
  6. Catmonkey

    Catmonkey I Void Warranties! Premium Member Established Member

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    I've been 185 miles an hour at the Texas Mile, with a similar setup to merkyworks, and didn't have any braking or ABS issues, but I didn't need to lock them up either. Difference was a 285/40-19 on the front, but the specs are the same in terms of diameter: 28" front, 28.8" rear
     
  7. Robert M

    Robert M 800 HORSE FUN!! Established Member

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    Not that the pictures below are your rim widths, but they are of R888's on 20" wheels. The front is 20X10 and the rear is 20X12. If nothing else, it will show the side wall and you can calculate 1/2" more bulge on your 11" wide 20's on the inside and outside and just a little more bulge 1/4" inside and outside on your 9.5" fronts.

    IMG-1955.jpg
    experiment-2.jpg

    IMG-1966.jpg

    If I remember correctly, the 285/315 R888 tire combination shown above are very close to the same in overall height, maybe .1 difference, the back being slightly taller?



    R
     
  8. Catmonkey

    Catmonkey I Void Warranties! Premium Member Established Member

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    If I'm not mistaken Toyo offers both a 285/35 and a 285/30. The 35 aspect would be taller than a 315/30.
     
  9. Kyle Backenstoes

    Kyle Backenstoes New Member

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    How's everyone here liking the r888's?
     
  10. HillbillyHotRod

    HillbillyHotRod Hooligan rabble rouser Established Member

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    My experience is they are a bit noisy. If you can live with that they are great.
     
  11. enormous

    enormous Member Established Member

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    Another sticky option to look at, which I run, I might add, is the Michelin Sport Cup 2 in 265 35 20 F
    and 325 30 20 R.
    The 325 R will fit your 11 perfect.
     

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