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Kosei K4R (Please Help with Fitment)

Discussion in 'Gen 3 Prius Main Forum' started by knite75, Aug 23, 2013.

  1. knite75

    knite75 Junior Member

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    Hello,

    I have 2013 Prius Model 5 that comes with the 17'' wheels.

    From my search, I think my wheels have the following spec:

    215/45/17 17X7 ET50mm 5X100

    Please kindly let me know if that's correct.

    Also, I'm thinking of buying a set of Kosei K4R on Tirerack.com

    Kosei K4R 17X7 ET50mm 5X100

    The weird thing is that, when I search under 2013 Prius, that wheel doesn't show up in the result.

    However, if I search under 2013 FR-S, it DOES showed up. Click Here

    Anyone know why so? It looks like an exact match. Unless I got my stock wheel spec all wrong.

    Does it fit?

    Thank you in advance

    [​IMG]
     
    #1 knite75, Aug 23, 2013
  2. burstaneurysm

    burstaneurysm Active Member

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    I may be wrong, but the offset is slightly too high to be direct fit. I believe ET45 is what's needed.
    FR-S wheels are ET48(?) and require a spacer to clear the caliper. These would fit, but you'd likely need a spacer.
     
    #2 burstaneurysm, Aug 23, 2013
    xpcman likes this.
  3. knite75

    knite75 Junior Member

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    My current stock wheels look like this:

    [​IMG]
     
    #3 knite75, Aug 23, 2013
  4. FranklinS

    FranklinS Ach crivens ye scunners!

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    I plugged in a 2011 Prius model 2 and got a fit. Sometimes they don't update fit stats. Ebay and Amazon also are often wrong.
     
    #4 FranklinS, Aug 23, 2013
  5. knite75

    knite75 Junior Member

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    Hi I plugged in 2011 model 2, but it shows only the one that with offset 38mm rather than 50mm.

    To be exact fit, I think I need 50mm
     
    #5 knite75, Aug 23, 2013
  6. knite75

    knite75 Junior Member

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    With a little more googling around...I learned that the center bore of the FR-S is 56mm...whereas, Prius is 54mm. Perhaps, that's why the Kosei K4R of my interest doesn't show up.

    Is this correct?
     
    #6 knite75, Aug 25, 2013
    FranklinS likes this.
  7. FranklinS

    FranklinS Ach crivens ye scunners!

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    The center bore does not matter as long as the wheel you are installing is as large or larger. Tire Rack's search engine allows for a larger bore but not smaller, I believe.

    I think it has to do with the FRS having a 50mm offset and the standard Prius a 45mm as has been related . People have ground down the caliper to fit. Since the wheel is only 7" a 38mm offset may do without a spacer or grinding the calipers? Take into account 1/2 new tire cross sectional width, 1/2 increase of 1/2" wheel width, and 38mm offset?

    Very nice wheel!!!
     
    #7 FranklinS, Aug 25, 2013
  8. knite75

    knite75 Junior Member

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    I think my stock 17" has 50mm offset too. What gives?


    SGH-T889 ? 2
     
    #8 knite75, Aug 25, 2013
  9. FranklinS

    FranklinS Ach crivens ye scunners!

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    I'm bad. 17" OEM fives are indeed 50mm offset and 7" wide. I did a look around and could not find anyone running this Kosei wheel on a Prius.
    [​IMG]

    It may have a problem with the spoke clearance such as this 48mm Scion FRS. It could be solved by spacers if you want to go that route. You will also need hubcentric adapters as almost all aftermarket wheels do.
     
    #9 FranklinS, Aug 25, 2013
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