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01-05-2021, 10:57 AM | #1 |
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Help Tire Size Change 2008 Z4si
I'm looking to change tire size on my 08 Z4si factory stock wheels it has the Sport package 18" wheels I beleive the factory lowers the suspension on this model.
1- Does anybody know the width in inches Front 18x8" is correct? 2-Rear 18x9" is correct? Important for me without changing or adjusting anything front or rear will I run into any problems? 1-I want to change the front from 225/40R 18 to 235/40R 18 is there any rubbing concerns? 2-I want to change the rear from 255/35R 18 to 265/35R 18 also is the there any rubbing concerns? and is the rear wheel at least 9" wide tire company wants this for a 265/35R 18 tire? Using a tire caculator there is not much difference is height width. Has anyone done this on the same car? Thank You for you time! One last thing I was going to go to regular tires and carry a plug kit. Anyone more happy with regular tires over run flats? I know it sounds simple and they should fit just want to be sure. This is my second BMW first was a 98 Z3M silver should have kept it! Last edited by KLEETIS; 01-06-2021 at 06:45 AM.. |
03-02-2021, 10:19 AM | #3 | |
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Drives: Built not Bought 04 Z4 VF. E70
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Lowered 1" all around. Run flats ride harsh. No concerns with conventional tires. Carry a plug kit if you drive where you may pick up a puncture. Your results may vary.
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04-01-2021, 10:16 AM | #4 |
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The 18" rims on the sport package are 18x8 in the front and 18x8.5 in the rear.
bmwstylewheels.com is a good resource for specs on all bmw wheels (they list sizes/offsets and weights for nearly all bmw wheels). My understanding is that 255 is about as wide as you can go on the stock 8.5" rear rim.
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