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Alternative Size(s) To 225/50 R17

Discussion in 'General Cars' started by securespark, 14 Sep 2021.

  1. securespark

    securespark

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    My Mum has a 15 plate Yeti 1.2 DSG Elegance.

    The OEM rims are 7Jx17 ET45 and the tyres 225/50 R17 94W.

    Are there any alternative sizes that will not alter speedo reading etc...?
     
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  3. Stivino

    Stivino

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    See it this is any help.
     
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  4. EFLImpudence

    EFLImpudence

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    What did you have in mind SS?

    Not an expert, but arithmetically -

    50% aspect ratio of 225mm. width = 112.50mm. height (rim to edge of tyre)

    So if you calculate 11250 / width, this will give you the percentage required for the same height.

    Therefore 11250 / 205 = 54.88% - so 55 would be the same.

    However, I read that you can only have 195 to 225 on 7J rims and , obviously they don't come in infinite varieties.
     
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  5. securespark

    securespark

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    She's had steel rims with winter tyres fitted and I wanted to check they were the right size.
     
  6. securespark

    securespark

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    Sorry, forgot to add the new steel rims are 16 inch.
     
  7. EFLImpudence

    EFLImpudence

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    Just measure the diameters.
     
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  8. securespark

    securespark

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    Thank you!
     
  9. Mottie

    Mottie

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    1E017D8E-EA5E-4B64-A9D5-AB1E97739F00.png
     
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  11. securespark

    securespark

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    Cheers Mottie.
     
  12. EFLImpudence

    EFLImpudence

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    The numbers do not match:

    upload_2021-9-24_17-8-37.png

    16" is 406.4mm. + 112mm. twice = 630.4mm. diameter which gives a circumference of 1980.5mm.
     
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  13. johnny2007

    johnny2007

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    Careful here.
    If you fit rims and tyres different from the ones specified by the manufacturer in your manual, in case of a serious accident the insurance will start being a pain in the backside.
    My car can only run on 225/50R17 XL, so I have no choice apart from the speed rating which goes H and above.
     
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  14. securespark

    securespark

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    Thanks. The ins co's are fine with steel wheels and winter tyres providing they are the sizes recommended in the owner's manual.

    Which they are!
     
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  15. conny

    conny

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    Showing my ignorance here. If 225 is the width of tyre and R16 is the rim diameter, what is the 50 after the 225?
     
  16. Burnerman

    Burnerman

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    It's called the Aspect Ratio...the distance between the outside diameter of the rim to the outside diameter of the tyre.
    John :)
     
  17. Stivino

    Stivino

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    It means that the aspect ratio is 50% of 225.
     
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