19 inch square setup question

akbjr · 10-26-2022, 11:24 AM

If I use the following tire sizes will I maintain the OEM rolling diameter spec?

275/35/19 front
285/35/19 rear (I beleive OEM is 285/30/20)

thinking of wheels that are 19X10 FRONT and 19X10.5 REAR

thanks

biglilsteve · 10-26-2022, 11:31 AM

Just run 275 or 285 all around. The 0.5" difference in wheel width should not necessitate different tire widths.

akbjr · 10-26-2022, 12:00 PM

Quote:

Originally Posted by biglilsteve

Just run 275 or 285 all around. The 0.5" difference in wheel width should not necessitate different tire widths.

Thanks.

What about the rolling diameter? Will that be the same as OEM?

John4C · 10-26-2022, 12:14 PM

Quote:

Originally Posted by akbjr

Thanks.

What about the rolling diameter? Will that be the same as OEM?

It'll be close enough. 275/35/19 is 0.57% less than stock, 285/35/19 is 0.46% greater than stock. Both will be absolutely fine. There are plenty of people running bigger differences than that without issue.

I am doing 275/35/19 all around for a winter set. Whichever you decide you will be fine.

akbjr · 10-26-2022, 12:15 PM

Quote:

Originally Posted by John4C

Quote:

Originally Posted by akbjr

Thanks.

What about the rolling diameter? Will that be the same as OEM?

It'll be close enough. 275/35/19 is 0.57% less than stock, 285/35/19 is 0.46% greater than stock. Both will be absolutely fine. There are plenty of people running bigger differences than that without issue.

I am doing 275/35/19 all around for a winter set. Whichever you decide you will be fine.

Thanks a lot!

Llarry · 10-26-2022, 01:04 PM

I'm running 275/35R-19 front & 285/35R-19 back without issues.

Edit: The actual answer to your question is no, you will not maintain OE diameter (or revs per mile) but the disparity is minor. The 18/19 and 19/20 tire fitments all have minor disparities. But they are all within tolerance so as to not invoke DCS issues.

Anderson11 · 10-26-2022, 01:14 PM

Check out tiresize.com. A very useful site to visual wheel size differences and offsets.
https://tiresize.com/comparison/

kmssmm · 10-28-2022, 09:01 AM

I'm running 275/35/19 all around, and add on 15mm spacer for front,25mm back. Fits good to me

1BAD4DR · 10-28-2022, 06:19 PM

Quote:

Originally Posted by kmssmm

I'm running 275/35/19 all around, and add on 15mm spacer for front,25mm back. Fits good to me

Are you running all stock 19s if so can you share photos? I’m thinking of running 19s stock wheels all around.

kmssmm · 10-28-2022, 06:30 PM

Quote:

Originally Posted by 1BAD4DR

Quote:

Originally Posted by kmssmm

I'm running 275/35/19 all around, and add on 15mm spacer for front,25mm back. Fits good to me

Are you running all stock 19s if so can you share photos? I'm thinking of running 19s stock wheels all around.

It's a aftermarket brand tho

kiw1 · 10-30-2022, 03:17 AM

The percentage difference between your rolling diameters (675.1, 682.1) is about 1% so you should be fine

10-26-2022, 11:24 AM	#1
akbjr Private First Class 57 Rep 138 Posts Drives: BMW Join Date: Sep 2021 Location: Chicago, IL iTrader: (0)	19 inch square setup question If I use the following tire sizes will I maintain the OEM rolling diameter spec? 275/35/19 front 285/35/19 rear (I beleive OEM is 285/30/20) thinking of wheels that are 19X10 FRONT and 19X10.5 REAR thanks
	Appreciate 0 Tweet Quote

10-26-2022, 11:31 AM	#2
biglilsteve Master Chief 1190 Rep 938 Posts Drives: '23 M3 CX Join Date: Aug 2022 Location: The Nation’s Capital iTrader: (0)	Just run 275 or 285 all around. The 0.5" difference in wheel width should not necessitate different tire widths.
	Appreciate 1 akbjr57.00 Quote

10-26-2022, 01:04 PM	#6
Llarry ///M driver 16051 Rep 499 Posts Drives: 2022 M3 6-speed Join Date: Jun 2006 Location: Oregon iTrader: (0) Garage List 2021 Porsche Macan GTS [6.25] 2022 BMW M3 [9.40]	I'm running 275/35R-19 front & 285/35R-19 back without issues. Edit: The actual answer to your question is no, you will not maintain OE diameter (or revs per mile) but the disparity is minor. The 18/19 and 19/20 tire fitments all have minor disparities. But they are all within tolerance so as to not invoke DCS issues. __________________ '22 G80 M3 6-sp Portimao Blue/Tartufo Last edited by Llarry; 10-28-2022 at 09:05 AM..
	Appreciate 0 Quote

10-26-2022, 01:14 PM	#7
Anderson11 First Lieutenant 458 Rep 328 Posts Drives: 2023 BMW M4 Comp Join Date: Oct 2020 Location: New Hampshire iTrader: (0)	Check out tiresize.com. A very useful site to visual wheel size differences and offsets. https://tiresize.com/comparison/ __________________ 2023 M4 Comp Dravit Grey Metallic
	Appreciate 0 Quote

10-28-2022, 09:01 AM	#8
kmssmm Private 55 Rep 62 Posts Drives: On Waiting 2022 BMW G80 M3Cx Join Date: Oct 2021 Location: Toronto iTrader: (0)	I'm running 275/35/19 all around, and add on 15mm spacer for front,25mm back. Fits good to me
	Appreciate 1 1BAD4DR124.00 Quote

10-30-2022, 03:17 AM	#11
kiw1 Lieutenant 617 Rep 438 Posts Drives: 2022 M3 Comp xDrive Join Date: May 2022 Location: Mammoth Lakes, CA iTrader: (0)	The percentage difference between your rolling diameters (675.1, 682.1) is about 1% so you should be fine __________________ 2022 M3 Comp xDrive - Frozen White 2024 X5 40i xDrive - Black Sapphire Metallic 2021 X5 40i xDrive - Black Sapphire Metallic - SOLD 2012 Audi A4 Avant - SOLD Insta: mtn_m3cx
	Appreciate 0 Quote