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Thread: Speedo affect by bigger wheels?

  
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    Speedo affect by bigger wheels?

    Just fitted new alloys to my mk4 sxi, and I remember seeing a calculator online somewhere to show how the speedo is affected. Anyone know a site with one?

    I upgraded from 205/50/R16 to 215/40/R17 and it would be good to know if my speedo is now reading wrong!

    Thanks

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    Shouldn't do too much as both these sizes are standard on a MK4 However the rolling radius of the 17's is slightly smaller so the speedo will read slightly light.

    According to my odometer i nw do 104 miles on 17s on a journey that used to be 102 on 16's - I've done this every week for 8 years so I know it's an accurate test.

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    If u want to know for sure, and u hav the old wheels - then wrap a tape measure around them and find out for sure!
    B.A.D.

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    YAAAAAY!

    That's the calc I had before, thanks a whole heap!

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