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Tyres? 205 or 225 1.6 Petrol

Discussion in 'A3/S3/Sportback (8P Chassis)' started by 37, May 26, 2013.

  1. 37
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    37 Member

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    [May 26, 2013]
    Chaps,
    Tyres on my car are nearly towards the end of their life and I am thinking of changing the alloys at the same time since current ones are well below average in terms of the looks (9 arm original Audi alloys). Considering I have got a 1.6 Petrol, I don't want beefy tyres to shoot my mpg's. Also, considering London's roads, I don't want to go below 45 to kill the suspension.

    I've been looking at 17" alloys and thinking of getting 205/45/17 V/Ws. Does this sound a reasonble combination? Could someone give me an idea of how much will 225's affect the mpg's? If it's 10miles per tank sorta thing, then I don't mind. But if it's like 30-40 then it would be a no-no.

    Please bear in mind before replying that I drive a Petrol and not diesel :p
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  3. AudiMafia
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    [May 26, 2013]
    I dont think there will be much difference in what your looking for. Probably couple of liters per tank?

    check this site to calculate your tyres Tire size calculator
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  4. 37
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    37 Member

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    [May 27, 2013]
    Pardon my ignorance - Does it mean that going for a wider tyre affects the speed as well as the odo reading in the long run?
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  5. JayT
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    JayT New Member

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    [May 27, 2013]
    Wider tyres will have no effect on Odo/Speedo reading. It's only the circumference of the tyres that will affect this, ideally you will want to run a lower profile tyre with larger alloys so that your tyre circumference remains the same as it was before.

    Use the calculator posted by Joe to get the right tyre profile for the new alloys.
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  6. AudiMafia
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    [May 27, 2013]
    Wider does not matter, unless you raise your profile/bigger/taller. More rubber more weight and more fuel/ different speedo reading. With Wider tires you have more grip on the road.
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  7. audicruiser
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    audicruiser Audi Heaven

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    [May 27, 2013]
    As said the width will have no effect on your mpg. The correct tyre sizes for the A3 from factory are as follows

    16" wheels 205/55 R16
    17" wheels 225/45 R17
    18" wheels 225/40 R18

    If I were you I would stick to those sizes.
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  8. 37
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    37 Member

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    [May 27, 2013]
    Well - to me, logically, it doesnt make sense. More width means more contact with road hence friction and reduced mpg :uhm:


    Thanks very much for this maty. That's perfect.
    Last edited: May 28, 2013
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