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      09-11-2016, 09:59 AM   #1
Vetracr
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Confirmation of tire size

I'm getting rid of the run flats on my 2010 3.0 Z4 6 spd. I've ordered TSW Bathurst rotary forged 18x8.5 ET35 front wheels and 18x9.5 ET39 rear wheels. I've upgraded my suspension with Koni FSD shocks and H&R sway bars but have left the stock springs. I've chosen to use Michelin Pilot Sport tires. I know the 3.5is 225 front and 255 rear combination will work. I'd like to run 235/40ZR18's on the front and 265/35ZR18's on the rear. Has anyone run this combination with the non sport suspension stock springs? Looking for conformation this combo will work. Thanks.
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      12-11-2017, 01:14 PM   #2
2Intense
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Quote:
Originally Posted by Vetracr View Post
I'm getting rid of the run flats on my 2010 3.0 Z4 6 spd. I've ordered TSW Bathurst rotary forged 18x8.5 ET35 front wheels and 18x9.5 ET39 rear wheels. I've upgraded my suspension with Koni FSD shocks and H&R sway bars but have left the stock springs. I've chosen to use Michelin Pilot Sport tires. I know the 3.5is 225 front and 255 rear combination will work. I'd like to run 235/40ZR18's on the front and 265/35ZR18's on the rear. Has anyone run this combination with the non sport suspension stock springs? Looking for conformation this combo will work. Thanks.
I have the same question.... can I run the 235/40/18's in the front and 265/35/18's in the rear on my 2010 35i with sport pkg?

Will I have rubbing issues?

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      12-11-2017, 04:36 PM   #3
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Will fit fine

Run Michelin PSS in 265 30 / 19 and 235 35 / 19 on my Z4 rims are
close to same as you describe. wider than stock,

Specifications:Size: 19x8.5 Front / 19x9.5 Rear
Bolt Pattern: 5x120
Finish: Silver Machined Face
Offset: 35 Front / 38 Rear
Hubcentric: 72.6





No issues, should be fine.
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      01-04-2018, 06:39 AM   #4
e92revolution
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I'm running 245/40/19's in the front and 275/35/19's in the rear on coilovers. I'm lowered to the extent that there is no wheel gap. No rubbing at all.
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      01-04-2018, 12:50 PM   #5
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245/40/19's in the front and 275/35/19's are way to tall.

Front 225/35/19 is stock. total diameter is 25.2 inch
your size is 26.72 inch over 1.5 inch, that's nearly 6% larger diameter.
my recommendation is 235/35/19 which is about .25 inch larger and about 1% bigger in diamert.

Rear 255/30/19 is stock
your size again is over 1.55 inch taller again nearly 6 %
my recommendation is 265 35 19 which is less then .25 inch and less than 1%.

Now you didn't talk about rims size or offset so I assume you are running stock.

But just because it doesn't rub, doesn't mean it fits. but its your car / money and choice.
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