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  1. #1
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    225 40 18 tyres or 225 35 18 ?????

    Okay I have 8 j wheels with 215 40 18 s it handles awful because of this to I'm changeling my tyres but do I go for a 35 or 40 profile what's the difference that this will make to comfort handling anything else I think they usualy have 40 s don't they thanks dan

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  3. #2
    crunchie's Avatar
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    Standard size on a 7.5J rim is 225 so on an 8J it should be 225 or 235 depending on offset. 215's would look daft.
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  4. #3
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    Howdy,

    To answer your Question - indeed 40 is the standard one, 35 would be cool too I guess but ride a little harder, if you have coil overs that would not matter much...

    If your country's roads are bad though I would rather go with 40's - might give you an extra life with a pothole...?

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  5. #4
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    225 40 18 tyres or 225 35 18 ?????

    Check the difference in cost

  6. #5
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    225 40 18 tyres or 225 35 18 ?????

    Your speedo and rolling circumference will be wayyyyy off if you fit /35


  7. #6
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    225 40 18 tyres or 225 35 18 ?????

    Standard size is 225 40 18 on a 7.5j rim, a 225 35 18 on an 8j rim is a difference of -3.5% rolling radius. Or to put it another way... If the speedo reads 70mph you're actually doing 67.5mph. Lower profile looks good but the ride suffers slightly.
    TDI PD170 S-Line Sportback... 191.2bhp & 290lb/ft torque @ standard with an iffy turbo! No idea with the new one or Shark Stage 1 remap installed, DPF off Stage 1 ready to go, Suspension & wheels to be fitted... Still....

  8. #7
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    Okay I've gone from 17 s to 18 a anyway but I think I'll go for the 40s look after the wheels and comfort more

  9. #8
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    Quote Originally Posted by dubindan View Post
    Okay I've gone from 17 s to 18 a anyway but I think I'll go for the 40s look after the wheels and comfort more
    225/40 R18 will be the best for the car as that was what the A3 was designed around. I have 8J x 18 on the front on my BMW and that was 225/40 R18 from the factory.
    Scott

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