G30 rims on G20

Asterix · 06-12-2019, 02:54 AM

I've checked characteristics of G20 rims vs G30 , and also what is reported by spacer users , it looks like it might be possible to use these rims on a G20 , that would allow tires of 245 and 275 at respectively front and rear.
Has anybody already tried or checked with a rim expert?

pkancel · 06-22-2019, 02:02 AM

No reason it shouldnt work, if the offset is ok. I had a 2017 G30 540 and wanted to upgrade and put on 2017 750i wheels and they worked perfectly. Gave me the upsize I wanted and fortunately the offset worked well. Thats the only think you would need to be sure of. Is the offset from a G30 with the fitment range for a G20.

ack720 · 03-09-2020, 04:30 PM

I am also looking for an advice to fit 664M g30 rims to G20. However, Front:245 and rear:275 is not adviced by BMW

chenry · 03-09-2020, 10:42 PM

Maybe I'm wrong (wouldn't be the first time) but I believe the G30 uses a 5x112 bolt pattern while the G20 uses a 5x120. Did the G30 bolt pattern maybe change

VipinLJ · 03-09-2020, 11:03 PM

Quote:

Originally Posted by chenry

Maybe I'm wrong (wouldn't be the first time) but I believe the G30 uses a 5x112 bolt pattern while the G20 uses a 5x120. Did the G30 bolt pattern maybe change

All G chassis cars use a 5x112 bolt pattern. The G20 included.

chenry · 03-09-2020, 11:37 PM

Quote:

Originally Posted by VipinLJ

All G chassis cars use a 5x112 bolt pattern. The G20 included.

thank you for the correction - 5x112 makes sense - I stumbled on a couple posts/searches that led me to believe it was possibly 5x120

ack720 · 03-10-2020, 01:59 AM

Bolt pattern is the same. However, G20 tyre widths 225/255 and G30 tyre widths are 245/275 and this may cause some problems...

Asterix · 03-10-2020, 12:44 PM

Agree but it looks like some people put even wider tires. I think using BMW rims would be better provided that ET is OK with G20. The rear tires are definitely too slim for this car .

Hazem Shahin · 02-03-2022, 12:00 PM

Quote:

Originally Posted by ack720

I am also looking for an advice to fit 664M g30 rims to G20. However, Front:245 and rear:275 is not adviced by BMW

hello there bro!....looking to do the same thing ...fitting those G30s on my G20....have you already done it?

Hazem Shahin · 02-03-2022, 12:02 PM

Quote:

Originally Posted by ack720

I am also looking for an advice to fit 664M g30 rims to G20. However, Front:245 and rear:275 is not adviced by BMW

hello there bro!....looking to do the same thing ...fitting those G30s on my G20....have you already done it?

greyrevolver · 02-21-2022, 09:40 AM

Quote:

Originally Posted by ack720

I am also looking for an advice to fit 664M g30 rims to G20. However, Front:245 and rear:275 is not adviced by BMW

What the maximum front tyre adviced by BMW?

06-12-2019, 02:54 AM	#1
Asterix Private 21 Rep 99 Posts Drives: BMW 330i G20 Msport Join Date: Oct 2005 Location: Basle-CH iTrader: (0)	G30 rims on G20 I've checked characteristics of G20 rims vs G30 , and also what is reported by spacer users , it looks like it might be possible to use these rims on a G20 , that would allow tires of 245 and 275 at respectively front and rear. Has anybody already tried or checked with a rim expert?
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06-22-2019, 02:02 AM	#2
pkancel Captain 149 Rep 674 Posts Drives: BMWs Join Date: Mar 2009 Location: Foothill Ranch/Lake Forest iTrader: (1)	No reason it shouldnt work, if the offset is ok. I had a 2017 G30 540 and wanted to upgrade and put on 2017 750i wheels and they worked perfectly. Gave me the upsize I wanted and fortunately the offset worked well. Thats the only think you would need to be sure of. Is the offset from a G30 with the fitment range for a G20.
	Appreciate 0 Quote

03-09-2020, 04:30 PM	#3
ack720 Registered 0 Rep 4 Posts Drives: G20 3.20i Join Date: Mar 2020 Location: Turkey iTrader: (0)	I am also looking for an advice to fit 664M g30 rims to G20. However, Front:245 and rear:275 is not adviced by BMW
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03-09-2020, 10:42 PM	#4
chenry Colonel 2356 Rep 2,964 Posts Drives: BMWs Join Date: Feb 2012 Location: SoCal Huntington Beach iTrader: (8)	Maybe I'm wrong (wouldn't be the first time) but I believe the G30 uses a 5x112 bolt pattern while the G20 uses a 5x120. Did the G30 bolt pattern maybe change
	Appreciate 0 Quote

03-10-2020, 01:59 AM	#7
ack720 Registered 0 Rep 4 Posts Drives: G20 3.20i Join Date: Mar 2020 Location: Turkey iTrader: (0)	Bolt pattern is the same. However, G20 tyre widths 225/255 and G30 tyre widths are 245/275 and this may cause some problems...
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03-10-2020, 12:44 PM	#8
Asterix Private 21 Rep 99 Posts Drives: BMW 330i G20 Msport Join Date: Oct 2005 Location: Basle-CH iTrader: (0)	Agree but it looks like some people put even wider tires. I think using BMW rims would be better provided that ET is OK with G20. The rear tires are definitely too slim for this car .
	Appreciate 0 Quote