Problems with 315s

Discussion in 'SRT Hellcat Wheels and Tires' started by Noquarter, Jun 6, 2015.

  1. Noquarter

    Noquarter Gold Member

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    I put new rims and tires in my cat this weekend. I went with a wheel called drag dr 64 with nitti motivos front and rear. Front tire is stock size 275/40 and the rear is a 315/35. The new rims are 10" in the back.

    My car had the p zero nero all season on it originally.

    The issue is the car feels very floaty now when accelerting. Its a bit disconserting to be honest. I was expecting it to be twice as grippy and better feeling than the o zero neros.

    Im thinking about going back to stock set up. I was just wondering if anyone else had experienced this? Its crazy that an all season felt way more stable than these nittos.

    Also it feels like the rims are a bit heavier than the stock but it could be the weight of the motivo wheels as well. Could that be a factor?
     
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  2. RoRo

    RoRo VIP Hellcat Member

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    I have been looking for some summer tires but now you're scaring the crap out of me
     
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  3. Noquarter

    Noquarter Gold Member

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    I dont think its "summer" tires as much as the 315s maybe? I dunno it just feels weird
     
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  4. Driver72

    Driver72 Gold Member

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    Any shimmy in the wheel?
    Any noticeable uneven-ess?
    Who did the balancing?

    A few pounds here and there in overall weight won't even be felt in a car that's this heavy and powerful.
    In actuality, if your new wheels and tires were a few pounds heavier, they'd probably feel more stable than floaty.

    And also, the Motivo's are an all season tire too. They may just be more floaty than the P Zero Nero's
    The 315 size should have nothing to do with it.
    However, 315 size tires are recommended to have a 10.5 inch wide wheel too.
    It's marginally better than putting the 305 size tire on the stock 9.5 inch wheel, but not by much.
    So you maybe getting a tiny bit of ballooning and that may add to the floaty feel as well, but in that case I'm not sure, as people putting 305 tires on 9.5 inch wheel haven't reported it feeling floaty due to ballooning.
     
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  5. Noquarter

    Noquarter Gold Member

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    Sorry they are Nitto Invos not Motivos.

    I had them rebalanced today and it did help a little bit with some vibration. But not the floaty feeling. No real noticble shimmy in the wheel.
    Its just the car seems to track funny under hard acceleration, floating would be tue best description that comes to mind.

    I thought 10.5 as well but he said his notes that a 10" was the smallest.
     
  6. ArtOfNoize

    ArtOfNoize Silver Member

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    I run the 315 nitto invo on the rear but they are on 11s. No issues at all. The 305 555s run great on the 11s as well.
     
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  7. Lord Hellcat

    Lord Hellcat Gold Member Hellcat Car Club Gold Supporting Member HCC UK President HCC Charter Member

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    Maybe their sidewalls are a lot softer than the Pirelli's
     
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  8. SinisterKitty

    SinisterKitty Silver Member

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    I am running the 305 Nittos on the stock rim and I am not experiencing any floatiness due to ballooning. Do you think tire pressure has anything to do with it?
     
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  9. Bascadog

    Bascadog Silver Member

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    I have done Nitto 305 555r's on stock rims and on aftermarket 10.5's. Never a problem.
     
  10. B5 Blue

    B5 Blue Platinum Member

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    SinisterKitty is right lower your tire pressure 5 lbs each or get another guage to compare the two.Go with 30 pounds cold and see what happens.
     
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  11. Noquarter

    Noquarter Gold Member

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    I believe they are softer sidewalls.
     
  12. Noquarter

    Noquarter Gold Member

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    Could it be the invos on the front causing the tracking issues? Maybe alignment?

    I will lower the preassure 5lbs on the rear and try it out
     
  13. IA_Cat

    IA_Cat Silver Member

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    I have 315 Invos on 10.5" rims and have not experienced your symptoms. Hope you get it sorted out.
     
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  14. hellcat562

    hellcat562 Silver Member

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    Anyone tried 315/35/20 on the rear with our OEM rims?
     
  15. Birddog

    Birddog Silver Member

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    Your Nitto's/ Mickey Thompson Drag Radials will have a softer sidewall that will cause a little more "sway". These tires are designed more for the traction of straight away pulls and not touring/ cornering. I recommend that if it makes you feel uneasy of the ride, run your P-zero's for daily driving and the Nitto's when you want to go play. Or keep driving them and after a bit you will get used to the feeling of the 315 and just play all the time- :)
     
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