Pirelli P Zero Trofeo R 295/35/20 good idea for Road Track Day?

Discussion in 'SRT Hellcat Wheels and Tires' started by Jettster, May 30, 2016.

  1. Jettster

    Jettster Gold Member Hellcat Car Club

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    Anyone tried these? I was thinking they would be great for a road track day.
     
  2. TrackDay

    TrackDay Silver Member

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    I'm running that same size in the Corsa System R compound tire on 10 in wheels. They work great. I wouldn't run them on less than 10 in wheels though.
     
  3. Tire God 2.0

    Tire God 2.0 Senior Hellcat Member

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    It's a fantastic tire. But can you guys fit that size on the fronts?? I keep mentioning it may be possible but nobody has confirmed.
     
  4. TrackDay

    TrackDay Silver Member

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    I have confirmed in other threads with details. 20x10 on all 4s with 15mm offset. On the front I need additional 3mm spacers to run the 295/35 tires. With 285/35 on the front no spacers needed.
     
  5. Tire God 2.0

    Tire God 2.0 Senior Hellcat Member

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    Why not a 12mm offset then instead of spacers?
     
  6. TrackDay

    TrackDay Silver Member

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    Bought off the shelf wheels. Custom forged units are not in my budget for this year anyway.

    When I go custom my plan is 10.5 on the front and 11 on the rear.
     
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  7. TrackDay

    TrackDay Silver Member

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    20160417_115951.jpg

    Front view of existing setup.
     
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  8. Jettster

    Jettster Gold Member Hellcat Car Club

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    Thanks for the feedback and pics-I bought a pair of replicas from Directline Wheels on eBay that are 10" with 18mm offet for rear-I can just hear a tiny rub somewhere when cornering to the right with 305/35/20 MT SS tires. So if I went with those and 295/35/20 all around would I need a spacer in front?
     
  9. TrackDay

    TrackDay Silver Member

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    I think you would. I have close to 4mm clearance from my inner sidewall to the spindle with my 3mm spacer and 15mm offset wheels. I'm not comfortable being any closer.
     
  10. TrackDay

    TrackDay Silver Member

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    Forgot to mention, your clearance would be influenced by your front camber. I'm lowered with MP Springs and have - 1.8 deg.
     
  11. CatHerder

    CatHerder SRT Hellcat Supporter Gold Supporting Member

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    Pirelli Corsa 295/35 on 10” wheels

    Section width 12.1” on 10.5” wheel
    Estimate section width 11.9 on 10” wheel
    Difference from stock PZero 275/40 on 9.5” wheel with 18.5mm offset to Corsa 295/35 on 10” wheels with 15mm offset:

    -10mm to strut +16mm outside extension


    Pirelli P Zero Trofeo R 295/35 on 10" wheels

    Section width 11.9” on 10.5” wheel
    Estimate section width 11.7” on 10” wheel
    Difference from stock PZero 270/40 on 9.5” wheel with 18.5mm offset to Pirelli P Zero Trofeo R 295/35 on 10” wheel with 15mm offset:

    -7mm to strut +13mm outside extension


    Pirelli Corsa 295/35 on 10” wheel with 15mm offset fit with a 3mm spacer

    Pirelli P Zero Trofeo R 295/35 on a 10” wheel with 15mm offset has 3mm greater clearance to strut than Pirelli Corsa,.

    So would they fit without spacers? Should be very close.
     
  12. Tire God 2.0

    Tire God 2.0 Senior Hellcat Member

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    Remember to leave a little room for sidewall deflection under lateral loads.
     
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  13. TrackDay

    TrackDay Silver Member

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    Yep, I agree with the calc. I have the same numbers in a spreadsheet, but when you're playing with manufacturer numbers for section width and estimates of a change in section width based on a drop in wheel width, I wouldn't say I'm very confident until I at least bought 1 of the tires and did some test measurements. I am confident it would fit with a 3mm spacer like I have, which is no issue given our thread engagement on the studs.
     
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  14. Tire God 2.0

    Tire God 2.0 Senior Hellcat Member

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    When running spacers that don't bolt on and have a new hub and studs, make sure you have a minimum of 7 lug nut turns to ensure proper thread engagement.
     
  15. Jettster

    Jettster Gold Member Hellcat Car Club

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    Thanks all for the great info-so-using stock rims for this size is a no-no? Any concern with running the replica rims at the track?
    Part of me is thinking of going with Michelins for summer use once the P Zeros are worn down and as of today they don't come in our size. I had great results with 255/45/20 A/S 3 all around on my 2010 SRT8 with Scat Pack WRZ 9" wheels. Thinking of pilots in that size or the 295/35/20...
     

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