Ideal 21" Custom Wheel Sizes for an 2018 M5

BrntRubber · 03-23-2021, 09:36 PM

Hi All,

I am ordering a custom set of wheels but as the f90 has a Xdrive, the tyre sizes need to be within 1% difference in rolling radius for X drive vehicles to not cause errors in the system.

The shop ordering the wheels says the below is the ideal:
21x9.5 with a 255/30 R21 front wheel
21x11.5 with a 305/25 R21 rear wheel

Can anyone confirm or advise?

Thank you

remmib · 03-24-2021, 10:42 AM

Quote:

Originally Posted by BrntRubber

Hi All,

I am ordering a custom set of wheels but as the f90 has a Xdrive, the tyre sizes need to be within 1% difference in rolling radius for X drive vehicles to not cause errors in the system.

The shop ordering the wheels says the below is the ideal:
21x9.5 with a 255/30 R21 front wheel
21x11.5 with a 305/25 R21 rear wheel

Can anyone confirm or advise?

Thank you

Too me it looks like most do 21x10 and 21x11 with 285/30/21 and 295/30/21 or 275/30/21 and 295/30/21.

BrntRubber · 03-24-2021, 10:58 AM

Quote:

Originally Posted by remmib

Too me it looks like most do 21x10 and 21x11 with 285/30/21 and 295/30/21 or 275/30/21 and 295/30/21.

Thanks bud!

josec70 · 03-24-2021, 07:26 PM

21" x 10" and 21" x 11"

MPS 4S

275-30-ZR21
295-30-ZR21

Been running this setup for about 2.5 years with no issues.

03-23-2021, 09:36 PM	#1
BrntRubber Second Lieutenant 70 Rep 263 Posts Drives: 991 Speedster and F90 M5 Join Date: Dec 2020 Location: London iTrader: (0)	Ideal 21" Custom Wheel Sizes for an 2018 M5 Hi All, I am ordering a custom set of wheels but as the f90 has a Xdrive, the tyre sizes need to be within 1% difference in rolling radius for X drive vehicles to not cause errors in the system. The shop ordering the wheels says the below is the ideal: 21x9.5 with a 255/30 R21 front wheel 21x11.5 with a 305/25 R21 rear wheel Can anyone confirm or advise? Thank you Last edited by BrntRubber; 03-23-2021 at 09:48 PM..
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03-24-2021, 07:26 PM	#4
josec70 Major General 4082 Rep 5,235 Posts Drives: 22' Individual Chalk M5C Join Date: Dec 2015 Location: Miami iTrader: (2)	21" x 10" and 21" x 11" MPS 4S 275-30-ZR21 295-30-ZR21 Been running this setup for about 2.5 years with no issues. __________________ CURRENT: 22' INDIVIDUAL M5\| CHALK \| TARTUFO \| CCB \| MPE \| H&R \| IND GONE: 19' M5C\| SINGAPORE GREY\| ARAGON\|VELOS VLS-06\|H&R\|iPE\|IND\|XPEL\|CF\|RADENSO GONE: 15' F10 M5\|BSM\|BLACK\|VELOS VSS-S2\|KW\|AKRA\|IND\|CF \|ESCORT 360\|VELOS PIGGY GONE: 13' F10 M5\|SG\|BLACK\|AKRA\|KW\|IND LONG GONE: 09' E60 M5\|02' E39 M5
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