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What is the correct tyre size?

Discussion in 'A3/S3 Forum (8L Chassis)' started by Backdrifts, Nov 18, 2007.

  1. Backdrifts
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    Backdrifts Member

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    What is the correct tyre size for the RSTT, S-line (what ever that are called) wheels that you get on an s3? I need three new tyres before winter.

    I'd look at my own car, but i'm about 150 miles away from it.

    thanks
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  2. Backdrifts
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    Backdrifts Member

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    Also where is a cheap place on the net to buy tyres from?
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  3. mattyboy199
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    mattyboy199 Active Member

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    I dont own a set but i would have thought 18 225 35 W/X/Y/Z
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  4. jcs356
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    jcs356 Brum brum

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    Depends what size rims they are. I'm guessing they are most likely to be 18 inch, in which case 225/40/18
    If they are replicas and 19 inch then they will be 225/35/19
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  5. Slick S3
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    Slick S3 Member

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    225/40 zr on 18's most likely
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  6. mattyboy199
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    mattyboy199 Active Member

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    17 = diameter in inches

    225 = width in mm

    45 = % above (101.25)

    so technically to keep the same wheel if switching to the 18's you would have:

    18 = diameter
    225 = width
    35 % (78.75+25=103.75)


    25 being an inch in mm.



    Correct me if i m wrong ?
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  7. Ess_Three
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    Ess_Three Active Member

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    225/40/18 was the tyre size fitted by Audi to the S3/TT fitted with the optional 18" wheels.
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  8. steebo888
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    steebo888 Member

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    225/35/18 and 225/40/18 are both correct.

    The 35 is more expensive and a harsher ride, but because of the lower profile has a smaller turing radius (not much though)

    As per essthree's comment above audi supplied them with the 40
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  9. Backdrifts
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    Backdrifts Member

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    thanks guys, yeah its the 225 40 18 I'm pretty sure of it.

    Does anyone knoe the cheapest place to buy tyres on the net?
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  10. jcs356
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    jcs356 Brum brum

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