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Thread: Tire size for 20"

  1. #1
    Regular Member SilverStarGTS's Avatar
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    Default Tire size for 20"

    I got a new (secondhand) set of 20" needing 2 new tires. Currently fitted with 225/30. I would like to switch over to /35 (more cost-efficient), but will this affect the ABS/TT if I would start with 225, 235 or 245/35 in the back?

    Switching over to 225/35 leaves me with a 3,5% speed difference, while almost everybody advises not to go over 3%. 235 and 245 are even more than 3,5...


    So, is it doable to use different sizes in front or back without messing up the ABS/TT? Or am I stuck with the 'less cheaper' /30? (or change all 4 )

    (I read a lot here, but counld't find an answer...)

    THNX

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    Regular Member SilverStarGTS's Avatar
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    Nobody knows if a difference of 3,5% will affect the ABS/TT?




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    Hi. The ABS and traction control will function fine, however I would not recomend that much difference.

    3.5% can make the car horrible!!! It can make it not want to pull up hills, you will lose accelateration etc... I know it does not sound much but you WILL notice it! I have messed with tyres sizes before. Unless you are trying to play with the gearing because you have tuned it or something keep them the same.

    Currently my brother has gone 3.6% smaller. The car reaches the reve limter to quickly so it is slower and it has lost about 5mpg for normal driving and about 15mpg on the motorway. He is going for the vx recomended sizes this time!

    Normally alloy wheel places do not recomend more than 2 to 2.5% difference absolute max.

    Don't worry about the ABS or traction control, but worry if the car will be drivable. At a guess I reckon it will just seem a bit flat in comparision to now. It can totally change its characteristics!

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    East Scotland Regional Organiser signumboy's Avatar
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    Quote Originally Posted by SilverStarGTS View Post
    I got a new (secondhand) set of 20" needing 2 new tires. Currently fitted with 225/30. I would like to switch over to /35 (more cost-efficient), but will this affect the ABS/TT if I would start with 225, 235 or 245/35 in the back?

    Switching over to 225/35 leaves me with a 3,5% speed difference, while almost everybody advises not to go over 3%. 235 and 245 are even more than 3,5...


    So, is it doable to use different sizes in front or back without messing up the ABS/TT? Or am I stuck with the 'less cheaper' /30? (or change all 4 )

    (I read a lot here, but counld't find an answer...)

    THNX
    You might have rubbing issues with 20" rims and 35 profile tyres depends if your motor is lowered also

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    Regular Member SilverStarGTS's Avatar
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    Quote Originally Posted by signumboy View Post
    You might have rubbing issues with 20" rims and 35 profile tyres depends if your motor is lowered also
    She's not lowered, and I don't have plans to do so. With 35% it will fill the arches more as well. BTW, got some spacers too, so I might have to fiddle around a bit (when they rub)

    @ Mucklestone: It's only for a couple of months. Two tyres need immediate replacement, so I thought about switching over to 35%. The other two will follow with 35 too.
    It could harm the acceleration of the car a bit indeed (2,9% against standard tiresize), but with a 2.2DTI I don't have to worry that much I think. It'll never be a racingcar


    To both, thanks for your reply

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    Regular Member Ziggy's Avatar
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    Have a look at neo brothers for tyres!!!

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    Regular Member SilverStarGTS's Avatar
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    Quote Originally Posted by s_zigmond View Post
    Have a look at neo brothers for tyres!!!
    Will cost me some to ship them to Holland

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    You Could Always look on www.camskill.co.uk They are always good and cheap for tyres

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