Aftermarket Wheel Fitment Guidelines

Discussion in 'Prime Accessories and Modifications' started by Rob43, Apr 3, 2018.

  1. Rob43

    Rob43 Senior Member

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    You're welcome !

    Looking forward to your feedback.



    Rob43
     
  2. ConfusedBirdie

    ConfusedBirdie Junior Member

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    Put the FRS wheels on my 2017 today. They look amazing in my opinion.
     

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  3. Nascosta

    Nascosta New Member

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    I’m looking to put these on my 2020 Prime, they seem to fit the bill. With a spacer and hub adapters.

    I know it will take a hit on MPG, but if it’s only 5-10mpg I’m not too worried about it.
     

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  4. ConfusedBirdie

    ConfusedBirdie Junior Member

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  5. Rob43

    Rob43 Senior Member

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    What exact tire brand/model did you get & what tire size ?


    Rob43
     
  6. Nascosta

    Nascosta New Member

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    Hi Rob, do you see any issues with the wheels in my previous post? Fitted to a 2020 prime? i’ve seen your link to the hubcentric adapters. They seem to fit the parameters you stated in the first post, thanks again this thread is very informative.
     
  7. ConfusedBirdie

    ConfusedBirdie Junior Member

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    I followed your advice on size and got 205 50 17. I went with Westlake SA-07. I had some on my optima hybrid and they were as fuel efficient as Continental Pure Contacts I also had And lasted worry free for 70k miles.
    So far, in a very limited sample size, my fuel economy has gone down by about 12% with this combination.
     
    #147 ConfusedBirdie, Oct 24, 2019
    Last edited: Oct 24, 2019
  8. Rob43

    Rob43 Senior Member

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    Yes they will fit.

    As far as I can tell, the hub bore on those FRS / 86 wheels is 56.1, so make sure you buy the correct hub rings* or spacers.



    Rob43

    * My personal hub rings for my wheels won't work on your wheels, my 17x7's have a 73.1 hub bore.
     
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  9. Nascosta

    Nascosta New Member

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    Thanks Rob
     
  10. Rob43

    Rob43 Senior Member

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    What tire Brand/Model are you going with & what size tire ?



    Rob43
     
  11. Nascosta

    Nascosta New Member

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    they are those 15 spoke wheels made for the Toyota 86.
    Make: Toyota TRD
    Size: All 4 rims 17x7.5
    Offset: ET +43
    Bolt pattern: 5x100
    Color: Flat gunmetal grey
    Hub Bore:56.1
    Part number: PTR20-18160-GR

    tire will be a 205/50-17 but not sure what brand
     
    #151 Nascosta, Oct 27, 2019
    Last edited: Oct 27, 2019
  12. ConfusedBirdie

    ConfusedBirdie Junior Member

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    I am a week into having the FRS wheels on my 2017 Prime.

    They are 17x7 and have a 48 offset. I put 205 50 17 tires on them. The tires I put on compared favorably to some Continental LRR on another hybrid I owned. I used 3mm spacers and the 56.1 to 54.1 hub ring:

    my question is this - if I’m getting 20-25 % worse MPG than stock, is there possibly something wrong? My EV range is down from 25 to 18.5.
    My mpg at 65 mph is down from 63 to 53. I drive around 110 miles a day and I got consistent 80-86mpg daily. Now I’m getting 66-68 mpg. Highway at 70mph I used to get 55mpg now I’m getting 43.

    could something be off because of the offset still being 45 vs stock 40? Are there certain things I should check first? When I let off the accelerator it seems to act almost like it is in “B” mode now and that is new.

    thanks for any guidance I can get.
     
  13. Rob43

    Rob43 Senior Member

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    First thing, pull one wheel off and put it on the an accurate scale and get your weight, then report back.



    Rob43
     
  14. ConfusedBirdie

    ConfusedBirdie Junior Member

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    42.5 lbs
     
  15. Rob43

    Rob43 Senior Member

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    1) Your ~42.5 lbs weight was roughly what I was expecting, this works out to be about 33% more weight than OE.

    2) The other major factor is your choice of ~$45 to $55 dollar Chinese tires, I actually believe that they work well in most environments, especially in the dry. BUT there is no factual data on rolling resistance / fuel economy, I believe that this is your most important factor and downfall on a tire like this.

    3) It's this combination of factors that's eating up some of your MPG's. But remember, your Prime now feels & drives MUCH better than a stock OE Toyota Prime sitting on 15" wheels.

    Another way to factor all of this: You saved BIG $ on your tire purchase, take your probable ~$200 to ~$250 dollar plus savings & factor them back into your fuel economy over the average life of these tires. Your fuel economy loss will be Much Less.


    Rob43
     
    #155 Rob43, Nov 5, 2019
    Last edited: Nov 5, 2019
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  16. genericuser

    genericuser New Member

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    Anyone know if the current gen Prius' star rim fits the Prime? Looks very nice, and must be low drag since it's OEM Prius part.
     
  17. Rob43

    Rob43 Senior Member

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    If they're off of a current Prius with a 5 lug bolt pattern, they'll fit just fine.

    Upgrade to a great tire for pure driving excitement:
    Better Handling On A Budget ! | PriusChat


    Rob43

    PS, If you have a conveniently located 240v outlet, you can charge up in 2 1/2 hours for less than $50 dollars.
     
  18. Nascosta

    Nascosta New Member

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    So it sounds like the ideal setup would be in the 28-30 lb range per wheel & tire assuming it’s a low rolling resistance tire.

    it’s crazy how the mileage takes a 25% hit with just a few pounds of extra weight per corner. It’s almost like you’re adding 500 pounds in the trunk
     
  19. MTN

    MTN Member

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    Its crazy what some people will pay for fashion.
     
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  20. Rob43

    Rob43 Senior Member

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    Concerning MPG's on a Prime:

    Typically speaking, trying to keep un-sprung weight (wheel & tire weight) down* is a fairly important thing. But what I believe is a slightly bigger issue on the Prime is having a good or great LRR tire. I can tell you from experience that it's very hard to buy an"affordable" 17" wheel & tire setup that is both light-ish in weight & has a good working LRR tire in the upgraded 17" size. It's a tough equation.

    I'd say that my personal MPG loss is roughly 12-15% when Solely on the ICE. I'm OK with this because my new driving enjoyment is much much higher when compared to running on the OE 15" wheels & tires.


    Rob43

    * My light-ish weight 17" wheel & tire setup is still 3 to 4 lbs heavier than stock.
     
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