10.5" Wheels & 315/35 Tires

Discussion in 'SRT Hellcat Wheels and Tires' started by IA_Cat, Apr 21, 2015.

  1. IA_Cat

    IA_Cat Silver Member

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    I purchased gloss black MRR HR6 rims with Nitto Invos.
    Rear - 20x10.5 +25mm 315/35/20 69lbs
    Front - 20x9 +20mm 275/40/20 61.5lbs

    To get the rears to fit we drilled a new hole in the inner fender well plastic toward the back of the car. We also had to use a heat gun to mold the front of the fender well, where the rib is.

    Here are a few pics.
    DSC_0001.jpg

    DSC_0003.jpg

    DSC_0004.jpg

    DSC_0005.jpg
     
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  2. HCone

    HCone Gold Member

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    Look great, should have came like that from factory
     
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  3. hellcat87

    hellcat87 Hellcat Member

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    Sexii!
     
  4. DGatzby

    DGatzby Gold Member Hellcat Car Club HCC Charter Member Midwest Regional Pres.

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    Those tuck up in there great! Nice guess/work! Looks great. How do the 315's bite with the 10.5"? Noticeable?

    Could you tell us how much work you had to do on the front rib? Did it just press back with heat? How far did you press? I don't think anyone has done that yet. Both sides left and right side rears? I really need to know, I have the same sizes on the way as you know.
     
  5. MaxxMuscle

    MaxxMuscle Gold Member Hellcat Car Club HCC Charter Member

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    Do u think if u would have went with a 305 nitto , would u have had the same issues ?
     
  6. IA_Cat

    IA_Cat Silver Member

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    I have no idea if they bite. I still have a few hundred miles to go before I can test them.
    There is metal right behind the rib so you can't do much. We just heated it up, kind of right in the middle of it where the tire could contact it, and used a piece of metal to flatten and smooth it. We had to do both sides. It was really easy.
     
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  7. IA_Cat

    IA_Cat Silver Member

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    Lots of guys do 305 and I don't think they have to manipulate anything. With a 315 my speedometer is still correct though.
     
  8. DGatzby

    DGatzby Gold Member Hellcat Car Club HCC Charter Member Midwest Regional Pres.

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    I have the 305's on the stock wheels now. 18.5mm offset, you have just more than 5/8" to spare. He took out about 1/4" with the 25mm backset and then some with the 315's. We knew it was tight, but thought success could be found, he did it!
     
  9. KLR CAT

    KLR CAT Active Hellcat Member

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    Looks great. Are these hub centric or did you nee hub rings?
     
  10. IA_Cat

    IA_Cat Silver Member

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    I had to get hub rings.

    Tad
     
  11. Driver72

    Driver72 Gold Member

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    Nice IA Cat
    As you know I've been looking and speaking of using 10.5 inch rear wheels with 315/35 tires as well.

    Really hard to find good wheels that come in those sizes.
    The MRR's look good.

    Did you weigh the wheels and tires separately or just while on the car?
    Seems you gained about 5 lbs each on the rears and dropped 2-3 lbs each up front.
    Stock wheel/tire combo (with summer tires) is right about 64.5 lbs
    But that's hard to tell how much of that is from the wheels and how much is from the tires.
    I'm guessing here, but in the case of the rears it's probably 2-3 lbs from the wheels and another 1-2 from tires.
    But the fact you dropped 2-3 lbs up front using the stock size tires and wheels that were only .5 inch skinnier confuses me.
    I'd think the Invo's were similar in weight (35 lbs) to the Pirelli PZero's and the 9 inch wide MRR would be similar in weight to the forged 9.5 inch stock wheel, so not sure how 2-3 lbs were lost up front??
     
  12. IA_Cat

    IA_Cat Silver Member

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    The wheels came to me with the tires mounted. The hub centering rings are thin adapters that allow the wheel to fit more snug on the hub. IIRC, the wheels were 73mm and the hub was 71.5mm.
     
  13. StellasHC

    StellasHC Platinum Member

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    Looks great Tad!
     
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  14. Driver72

    Driver72 Gold Member

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    Oh those thin polymer like rings? Oh yes I have seen them on some of the wheels I've gotten. Popped them on before.
    Had a brain fart.
    Thanks


    The MRR's look sick in Black Diamond too. :)
     
  15. IA_Cat

    IA_Cat Silver Member

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    I ordered aluminum rings and used lots of anti-seize.
     
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