JMB RetrofitsSky Insurance
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  1. #1
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    Larger wheels at last (I hope)

    Hi guys, a quick wheel question from someone with not a lot of experience in this area. I'm thinking of changing my embarrassing 195/65R15 wheels to a set of RS6's with 225/40R18's on them. I am aware that there will be a slight difference in the rolling circumferences and was wondering to what extent this will effect speedo readings???? I presume there a way to programme in the new tire size so as to keep the speed reading true???

    Thanks

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  3. #2
    Carpy25's Avatar
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    check here , it says that it will be ok

    http://www.rtecalloywheels.co.uk/fitment_guide.htm


    Rob

  4. #3
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    doesnt make any difference- well not tha i noticed anyway and i went from 15' to 19s

  5. #4
    1wheelonly's Avatar
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    It stays the same, what you go up in size on the alloys you go down on the wall / profile of the tyre.
    LOTS DONE, LOTS SPENT !!!!

  6. #5
    1210tech's Avatar
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    if you put the 15's next to the 18's with the tyres fitted you will notice that they will be quite a bit bigger but it shouldn't affect the speedo by much. when i upgraded mine from 15" to 18" it knocked the speedo out by about 4mph
    A4 2.5 TDi quattro sport saloon
    RNS-E DVD Nav running SW 0600 with 2007 disc including TMC function, Bluetooth Telephone, Audi iPod Interface
    18" RS6's now gone, replaced by OEM 18" S4 alloys
    Retrofit S-Line Bodykit
    Retrofit OEM Xenon's
    Retrofit Front Ambient Lighting
    Retrofit OEM Aero Wipers (thanks PJMSpeedy)

  7. #6
    james0808's Avatar
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    I went from 15's to 18's to 19's and my speedo got more accurate compared to my sat nav.

  8. #7
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    cheers guys been very helpfull

 

 

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