[Superlative]

Will this combo work without rubbing on stock M Sport suspension?

Front: 8.5x19 ET35 235/40R19
Rear: 9.5x19 ET35 275/35R19

Could I run 20's by decreasing the aspect ratio by 5 on both front and rear?

[Superlative]

Originally Posted by alohasurftoad

245/35/19, 275/30/19, is 25.8", 25.5" will work without rubbing the stock m sport suspension. at a diameter difference of 1.2%, it is the max i have seen someone with an x-drive run without problems. personally, i wouldn't risk it and reduce the front to 235/35/19

235/35/19, 275/30/19, would work better on an x-drive since both are 25.5". if you are not lowered, your wheel gap will increase .25" more than what you have now, something to think about.

if you run 20's, 235/35/20 and 275/30/20 are both 26.5" (again same diameter is best for x-drive). it will also fill some wheel gap.

What about Front: 8.5x19 ET35 235/40R19 Rear: 9.5x19 ET35 275/35R19

Looks like the last option is best: 0% ratio for Xdrive and fill wheel gap. I don't plan to lower as the car is a lease.

Now, if I go from OEM 19 to this 20 setup, the aspect ratios go from 3.5" down to 3.2". Am I going to "feel" a big change with that 0.3" delta? Will pot holes destroy me more?

[Superlative]

Originally Posted by alohasurftoad

If you care about impact protection and ride as well as appearance, 19s would be better with 235/40/19, 265/35/19, 26.4", 26.3", 0.4%. unfortunately there are limited tire brands and models in this combo. mps4s or continental extremecontact sport is what I'd get.

see @wdeerfield's car in the link below. 9.5" +35 rear would poke 10mm further out.

https://f30.bimmerpost.com/forums/sh...=vmr+v803+mp4s

wdeerfield's car is not a F36. F36 has different fitment. You can actually have 15-20mm of spacer width to play with at back with OEM 255, from what I've read on different forums.

[wdeerfield]

id do 235/265 combo with et35 front and rear for your GC. could theoretically get away with an et30 up front if you wanted very flush.

yes mine is an f30 and i didnt plan to lower so i went et45 out back. i could have fit et35-40 without issue but at stock height it would look like its poking. Since the F36 gives more room out back like the F32 you can do et35

[Superlative]

Originally Posted by wdeerfield

id do 235/265 combo with et35 front and rear for your GC. could theoretically get away with an et30 up front if you wanted very flush.

yes mine is an f30 and i didnt plan to lower so i went et45 out back. i could have fit et35-40 without issue but at stock height it would look like its poking. Since the F36 gives more room out back like the F32 you can do et35

ET35 square on 235/265... thanks for the info.

[bmw22915]

Originally Posted by Superlative

wdeerfield's car is not a F36. F36 has different fitment. You can actually have 15-20mm of spacer width to play with at back with OEM 255, from what I've read on different forums.

And, on second thought, I actually found both of your replies uninformative. You mentioned a bunch of sizes yet my initial size question remains unanswered:

"Will Front: 8.5x19 ET35 235/40R19 Rear: 9.5x19 ET35 275/35R19 work on F36?" This combo gives +0.8% diameter difference... good for XDrive spec and fills the wheel well. But does it rub? LOL

You're are ignorant for asking for help and not being appreciative of other people's time and effort. Aloha has a wealth of knowledge and is a very active forum member who has helped countless amounts of enthusiasts. How about you rephrase your question or ask again if it wasn't answered to your specific liking. He did reply based off of your original answer.

[Superlative]

Originally Posted by bmw22915

You're are ignorant for asking for help and not being appreciative of other people's time and effort. Aloha has a wealth of knowledge and is a very active forum member who has helped countless amounts of enthusiasts. How about you rephrase your question or ask again if it wasn't answered to your specific liking. He did reply based off of your original answer.

The guy pointed me to a 3-series. Different car. Different fitment.

BTW, "you're are?"

[bmw22915]

Originally Posted by Superlative

What I edited in my original post was the question regarding 20s. Not the sizes for 19.

BTW, "you're are?"

Except you can clearly see the edited post vs the quoted post beneath with the difference in 19 sizes. Also, thank you for correcting me on my minor grammar mistake. I'm sure you feel a sense of accomplishment and superiority in doing so. Enjoy your time on the forum.

[wdeerfield]

Originally Posted by Superlative

ET35 square on 235/265... thanks for the info.

not square... 265 cannot fit a 8.5

i was referring to et35 if you were going 8.5 f and 9.5 rear.

[Superlative]

Originally Posted by wdeerfield

not square... 265 cannot fit a 8.5

i was referring to et35 if you were going 8.5 f and 9.5 rear.

I used the term "square" loosely referring to the ET35 being for both front and rear.
I'll mention the suggestions to my dad! Thanks again.

[Machinebuilder]

Living in Toronto I would think 20 inch wheels would be problematic for damage. I would go 19" max. but the choice is yours.