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Aftermarket Wheel Fitment Guidelines

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

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  1. Rob43

    Rob43 Senior Member

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    You're welcome !

    Looking forward to your feedback.



    Rob43
     
    #141 Rob43, Oct 12, 2019
  2. ConfusedBirdie

    ConfusedBirdie Member

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

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    #142 ConfusedBirdie, Oct 21, 2019
  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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    #143 Nascosta, Oct 24, 2019
  4. ConfusedBirdie

    ConfusedBirdie Member

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    D997BCED-49CA-42D8-83DA-7504351F8E1A.jpeg
     
    #144 ConfusedBirdie, Oct 24, 2019
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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
     
    #145 Rob43, Oct 24, 2019
  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.
     
    #146 Nascosta, Oct 24, 2019
  7. ConfusedBirdie

    ConfusedBirdie 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.
     
    #148 Rob43, Oct 25, 2019
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  9. Nascosta

    Nascosta New Member

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    Thanks Rob
     
    #149 Nascosta, Oct 25, 2019
  10. Rob43

    Rob43 Senior Member

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



    Rob43
     
    #150 Rob43, Oct 25, 2019
  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 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.
     
    #152 ConfusedBirdie, Oct 28, 2019
  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
     
    #153 Rob43, Oct 28, 2019
  14. ConfusedBirdie

    ConfusedBirdie Member

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    42.5 lbs
     
    #154 ConfusedBirdie, Nov 5, 2019
  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 Junior 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.
     
    #156 genericuser, Nov 8, 2019
  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.
     
    #157 Rob43, Nov 9, 2019
  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
     
    #158 Nascosta, Nov 12, 2019
  19. MTN

    MTN Active Member

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    Its crazy what some people will pay for fashion.
     
    #159 MTN, Nov 13, 2019
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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.
     
    #160 Rob43, Nov 13, 2019
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