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Please help me solve this 20” aftermarket tire stretch issue

Discussion in 'Model 3' started by Mark Soliman, Aug 9, 2018.

  1. Mark Soliman

    Mark Soliman Member

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    I purchased 20” Vossen vfs6 with a staggered setup (widths are 9” front and 10.5” rear). Rear tires are 285/30/20 and are pictured. I thought the look was unacceptable and due to other reasons unrelated to this I took the wheels off and am reconsidering tire sizes.

    Question - for those that have 20” staggered setups, (1) what’s your rear wheel width and (2) do you have the same issue of tire stretching and wheel lip underbite? If no, advise?

    Your rear 20” staggered close up pictures much appreciated
     

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  2. remlemasi

    remlemasi Member

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    Specs for this tire show a recommended rim width range of 9.5" - 10.5" (https://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=Pilot+Super+Sport)

    Your rim width is right at the maximum of the recommended range.

    I definitely hate tire stretch as well and actually aim for a square, meaty shoulder look, even for low profile tires. That typically leads me to choose tires where the rim width is right at the minimum of the recommended range (9.5" in your case).

    You can look at the other sizes to see how your rim width relates to the recommended range, but I hesitate to make recommendations on this board as there are so many factors that may or may not introduce rubbing and I don't want to steer you the wrong way.

    For example, 295/30ZR20 has a recommended rim width range of 10" - 11". Your rim would be right in the middle with some tire stretch remaining, but not as bad as it is right now.

    The downside is that the tire diameter is 27" and section width is 11.9", which is larger than your current tire with 26.8" and 11.6", respectively. May not seem like much, but I'm not sure how close you are to rubbing right now.

    The OEM 20" tire is at 26.5" and 9.5", respectively, so you're already exceeding the OEM specs, the diameter just by a bit, but the section width by a huge amount.

    Good luck.
     
  3. Mark Soliman

    Mark Soliman Member

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    Thanks a lot for this really helpful reply!

    I wonder is anyone else in the forum running 295’s? Any issues? Does anyone know the maximum tire width I can run without rubbing? Another detail is I just dropped it by 1” using tsportline springs

    Thanks to all in advance
     
  4. Mark Soliman

    Mark Soliman Member

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    Assuming I try and minimize the stretching but nit necessarily eliminate it, what are your thoughts on this tire? https://m.tirerack.com/tires/tires.jsp?tireMake=Continental&tireModel=ExtremeContact+Sport&partnum=83YR0ECSXL&vehicleSearch=false&fromCompare1=yes

    It’s still at 285, has a slightly lower diameter but wider tread width.
     

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  5. 240W

    240W Member

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    305/25/20? that's going the other way, instead of slightly stretching, it'll be slightly bulging but within range. (For square, rim width for that tire looks to be 11 wide)

    rubbing issue also depends on offset of the wheel, but I don't remember seeing anyone running larger than 285... yet...
     
  6. Brando

    Brando Active Member

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  7. remlemasi

    remlemasi Member

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    If you take a look at the specs, it still says the recommended rim width range is 9.5" to 10.5". If you're looking for a square profile, the rim needs to be at the low end of that range, i.e. 9.5". Your rim is 10.5", which is at the high end of that range, which means it will look stretched. How much compared to the MPSS is hard to say...

    IMHO, a 10.5" wide rim is too big and going with 9.5" (and the same tire) would get you the square tire profile. I know that's not the answer you are looking for, but a lot of this aftermarket wheel/tire game is just trial and error until enough data from enough failed experiments is accumulated. Some people do like the stretched look, so only you can determine whether or not your experiment is a success or failure :)

    I hate the #stancenation look because I think it looks ridiculous. I even think the stock 235/45R18 looks too stretched on my 18" Aeros!

    But in all fairness... if you were to ask me why I like the square shoulder profile, my answer would be just as vain: #becauseracecar :)
     

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  8. 240W

    240W Member

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    i thought so too, 245 would look like it fits better, but I guess range may have suffered and not reach whatever efficiency goals they wanted
     
  9. remlemasi

    remlemasi Member

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    Yeah, 235 seems crazy narrow to me, especially for the P3D and all that torque.

    But I guess it's sufficient since the P3D is already getting crazy fast 0-60 and 1/4 mile times with even the 18" Aeros and Michelin Primacy MXM4 all-seasons.
     
  10. hdAge

    hdAge Member

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    Do you feel any bite or scratch when driving or cornering at all? Or did you just notice the mark when parked? I just started this thread on Vorsteiner with the exact same staggered setup and wheel/tire dimensions as you have.
    Vorsteiner VFF-103 aftermarket 20" wheels

    But ofcourse every wheel/tire setup is different and the setup has to be tested before pulling the chord. In this case, looks like Vorsteiner has tested this setup and now they have few orders pending.
     
  11. mobilesuit818

    mobilesuit818 Member

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    There is nothing wrong with tire stretch, even more so if you are super wide.

    I find tire stretch removes the sidewalk flex but will make the ride harsher a bit.
     
  12. Blkdragn

    Blkdragn New Member

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    This is very odd and the first I've seen of a 285/30 with that much stretch on a 10.5" wheel. All tires are not created equal and some are wider than others even though they are the same size. Michelins typically are wider and have a rim protector built in but it appears the wheel design might be the culprit. Personally I've ran 275/30 and 285/30 on 10.5" wheels and some manufacturer's 275 tires sat the same way your 285 is fitting which is very odd. I think your wheel may be technically 10.5" wide however with the design of the wheels and how the spokes meet the outside on that beveled edge, it makes the wheel protrude out.
     
  13. Josh@GYW

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    This is confirmed that the 285/30/20 that the OP has is the Michelin Pilot Super Sport K1 with the narrowest tread width at 9.5". The M01 version has the 10" tread width which would help minimize this stretched look.
     

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