[itrocks4u]

Hi,

Looking to purchase new set of tires. Will these fit x-drive. Unfortunately, I don't know how to use the calculator Can someone let em know the rolling diameter?

OPTION 1: 235/40/19 & 265/35/19 (I thought 235/35/19 in the front and 265/30/19 in the rear is more common. Which one is correct)?

OPTION 2: 255/35/19 & 285/30/19

OPTION 3: 225/40/19 & 255/35/19

Wheels are FRONT 19X8.5 +30 and REAR 19X10 +45 so I'm hoping to go with a wider tire.

Car is lowered on ACS Springs.

Lastly, car itself is 2015 BMW 435i xdrive gran coupe

[UPWheels]

Originally Posted by itrocks4u

Hi,

Looking to purchase new set of tires. Will these fit x-drive. Unfortunately, I don't know how to use the calculator Can someone let em know the rolling diameter?

OPTION 1: 235/40/19 & 265/35/19 (I thought 235/35/19 in the front and 265/30/19 in the rear is more common. Which one is correct)?

OPTION 2: 255/35/19 & 285/30/19

OPTION 3: 225/40/19 & 255/35/19

Wheels are FRONT 19X8.5 +30 and REAR 19X10 +45 so I'm hoping to go with a wider tire.

Car is lowered on ACS Springs.

Lastly, car itself is 2015 BMW 435i xdrive gran coupe

TIRE COMBO = OVERALL DIAMETER
235/40/19 & 265/35/19 = 671 mm & 668 mm (-0.4%)

235/35/19 & 265/30/19 = 647 mm & 642 mm (-0.8%)

255/35/19 & 285/30/19 = 661 mm & 654 mm (-1.1%)

225/40/19 & 255/35/19 = 663 mm & 661 mm (-0.2%)


235/35/19 & 275/30/19 = 647 mm & 648 mm (+0.1%)

***Summer Clearance Sale***

Sales @ UPWheels.com * Ph. 657.888.4UPW * FacebookDOTcom/UPWheels

[Daggen]

I'm about to place an order for wheels to the 440. It should arrive here in Sweden around first week of August so I want to make sure wheels are around when it comes.

First, what's your thoughts on BBS CH-R vs CI-R.
Going for black with either of them. 20's.

Dealer recommendation based on discussion with BBS is 8,5/20 front with 225/35-20 and 9,5/20 rear with 245/30-20. My initial thinking is that 9,5 with 255 sounds a bit to wide for that tire...?

Edit: oops, posted in wrong thread. Sorry.

[VMRWheels]

235/275 is going to be the closest to 0% difference, so it will be the best option, in terms of minimizing stress on your xDrive system. Just make sure that the 275 will fit comfortably on the 10" wheel without causing any rubbing issues. It should be fine since xDrive cars usually sit higher from the factory. Not sure how much of a drop the ACS springs provide, though.

[itrocks4u]

Originally Posted by VMRWheels

235/275 is going to be the closest to 0% difference, so it will be the best option, in terms of minimizing stress on your xDrive system. Just make sure that the 275 will fit comfortably on the 10" wheel without causing any rubbing issues. It should be fine since xDrive cars usually sit higher from the factory. Not sure how much of a drop the ACS springs provide, though.

What about 9.5. Is 275 good for 9.5 width?

[.BMW.]

Originally Posted by itrocks4u

What about 9.5. Is 275 good for 9.5 width?

9.5" wide wheels is the recommended size for 275/30, 275/35 and 275/40 tires.

[itrocks4u]

Originally Posted by .BMW.

9.5" wide wheels is the recommended size for 275/30, 275/35 and 275/40 tires.

And If I have 10" in the back. Can I still run 275/30? Or should I be going wider? don't think that would work though. Thoughts?

[itrocks4u]

Originally Posted by UPWheels

TIRE COMBO = OVERALL DIAMETER
235/40/19 & 265/35/19 = 671 mm & 668 mm (-0.4%)

235/35/19 & 265/30/19 = 647 mm & 642 mm (-0.8%)

255/35/19 & 285/30/19 = 661 mm & 654 mm (-1.1%)

225/40/19 & 255/35/19 = 663 mm & 661 mm (-0.2%)


235/35/19 & 275/30/19 = 647 mm & 648 mm (+0.1%)

***Summer Clearance Sale***

Sales @ UPWheels.com * Ph. 657.888.4UPW * FacebookDOTcom/UPWheels

What would the front need to be if I want to run 285/30/19 in the rear on 10" wide wheel (instead of 9.5)?

[.BMW.]

Originally Posted by itrocks4u

And If I have 10" in the back. Can I still run 275/30? Or should I be going wider? don't think that would work though. Thoughts?

Yes.

With your wheel spec I recommend a 235/275 setup.

F: 8.5x19" ET30, 235/35-19
R: 10x19" ET45, 275/30-19

Almost identical diameters which is crucial with xDrive.

[UPWheels]

Originally Posted by itrocks4u

What would the front need to be if I want to run 285/30/19 in the rear on 10" wide wheel (instead of 9.5)?

245/35 and 285/30 has the same O.D. @654mm.