[snj49er]

From what I've read here, it seems this will work, but a reality check would be really helpful. I have a chance to pick up a set of wheels and tires and want to be sure that there won't be any issues with them on my F30 xdrive. It appears that these are about 2% taller than OEM and there is a difference in the F and R diameters of 0.6%...I've never seen an exact spec for how close this has to be for xdrive.

F: 19x8.5 ET 33 - 245/40
R: 19x9 ET 44 - 275/35

If anyone could point me to a picture with similar wheel/tire size on an F30 AWD or RWD, I'd appreciate it.

[.BMW.]

Here is two members with 20" F10 wheels, the offsets and the tire widths is exactly the same as on 19".

20" style 356 and 373 for F10:
F: 8.5x20" ET33, 245/35-20
R: 9x20" ET44, 275/30-20

F30 335i with 20" oem style 356 Gorgeous: f30.bimmerpost.com
328i Msport with 20" style 373M on HR sport: f30.bimmerpost.com

[JMH063]

This is my F30 with the M464 from the F10

[335i_4D]

On 20" wheels, the closest match for front and rear tires are:

F 235/35R20 - 26.48"
R 275/30R20 - 26.50"

This is the exact setup I'll have on my car.

The 245/35R20 are 26.75" high, original 225/40R19 (on my car) are 26.09"
Usually, I don't exceed +- .5" (about 2% difference, depending on tires size)


For the 19" wheels:

Original: 225/40R19 - 26.09"
F 235/40R19 - 26.40"
F 245/40R19 - 26.72"
R 275/35R19 - 26.58"

Seems like the F245 - R275 are closer (by 0.04") on 19", but the front will be slightly higher (.14").

To calculate tire ratio:

245 (width of tire) / 40 (tire height ratio in%) R 19 (size of wheel)

(width of the tire) / 25.4 (to convert in inch) * o.(tire height ratio) * 2 (adding the lower and upper sidewall height) + (size of wheel)

245 / 25.4 = 9.65
9.65 * .40 = 3.86
3.86 * 2 = 7.72
7.72 + 19 = 26.72"

[snj49er]

Many thanks to those who responded. Since the 245/40/19 and 275/35/19 combination are a couple percent taller than stock, would I be OK going with a square setup of 255/35/19 on the 8.5" ET 33 wheels? Those tires seem to be almost the same as the OEM diameter. Of course I'm open to any good ideas.

Originally Posted by 335i_4D

On 20" wheels, the closest match for front and rear tires are:

F 235/35R20 - 26.48"
R 275/30R20 - 26.50"

This is the exact setup I'll have on my car.

The 245/35R20 are 26.75" high, original 225/40R19 (on my car) are 26.09"
Usually, I don't exceed +- .5" (about 2% difference, depending on tires size)


For the 19" wheels:

Original: 225/40R19 - 26.09"
F 235/40R19 - 26.40"
F 245/40R19 - 26.72"
R 275/35R19 - 26.58"

Seems like the F245 - R275 are closer (by 0.04") on 19", but the front will be slightly higher (.14").

To calculate tire ratio:

245 (width of tire) / 40 (tire height ratio in%) R 19 (size of wheel)

(width of the tire) / 25.4 (to convert in inch) * o.(tire height ratio) * 2 (adding the lower and upper sidewall height) + (size of wheel)

245 / 25.4 = 9.65
9.65 * .40 = 3.86
3.86 * 2 = 7.72
7.72 + 19 = 26.72"

[335i_4D]

Dunno, and maybe others have done it, but isn't 255 too wide for the front ?

[snj49er]

Thanks for your reply. Can you tell me what size tires you have?

Originally Posted by JMH063

This is my F30 with the M464 from the F10

[snj49er]

I found a year-old thread where a couple of guys were running 255/35-19 and 245/40-19 both square. The latter was on an xdrive...245/40-19 is the OEM square setup on the F10 xdrive.

http://f30.bimmerpost.com/forums/sho...d.php?t=866093

In this thread, the OP had 245/40-19 on RWD, but followed up with a report of a little rubbing.

http://f30.bimmerpost.com/forums/sho...d.php?t=851622

IMO, the 225/40 OEM tire shown below looks a little stretched on the 8x19 wheel and the wheels I'm considering are 8.5". It appears that 235/40-19 is only marginally larger than stock diameter at 26.4". If that's workable, I wouldn't mind filling up the xdrive tire gap a bit. So many tire sizes, so little time.

Originally Posted by 335i_4D

Dunno, and maybe others have done it, but isn't 255 too wide for the front ?

[JMH063]

Originally Posted by snj49er

Thanks for your reply. Can you tell me what size tires you have?

on the picture it's

245/35/20 front and 275/30/20 rear

I have changed them to non run flat 245/30 and 265/30/20

[335i_4D]

Originally Posted by JMH063

on the picture it's

245/35/20 front and 275/30/20 rear

Did it rubbed at all with this setup ?
And on the picture, any drop or stock RWD height ?

[JMH063]

Originally Posted by 335i_4D

Did it rubbed at all with this setup ?
And on the picture, any drop or stock RWD height ?

No rubbing at all. suspension = M sport + M performance springs ( - 1cm)

[snj49er]

Good to hear...thanks for that!

Originally Posted by JMH063

No rubbing at all. suspension = M sport + M performance springs ( - 1cm)

[Kid Red]

Originally Posted by JMH063

This is my F30 with the M464 from the F10

Resurrection...Any chance you can post more photos? (assuming you are still a member, etc...)