G42 Aftermarket Wheels & Tires

vismajeure · 06-07-2023, 11:46 AM

BBS CH-R
Front 255 35 19 / Rear 275 35 19 Continental Extremecontact DWS
19x8.5 +32mm offset PLUS 15mm Spacer
19x9.5 +45mm offset PLUS 5mm Spacer (Thinking about going to a 15mm spacer but may rub)

230i lowered on Cobra Suspension Lowering Springs

applecst · 07-18-2023, 01:25 AM

Need help! I recently got a set of wheels in the following spec and are looking for a good set up:
Front: 8.5 et 25 and Rear: 9.5 et 32

My car is currently lowered (pretty low see pic) wondering what kind of spacers should I put on. And I do not have the ztk package fender.

Also wondering if I get 245/275 tires can I lower the aspect ratio to 35 front and 30 rear? Given that the tire is wider now.

XC3LLR8 · 07-18-2023, 11:08 AM

Quote:

Originally Posted by applecst

Need help! I recently got a set of wheels in the following spec and are looking for a good set up:
Front: 8.5 et 25 and Rear: 9.5 et 32

My car is currently lowered (pretty low see pic) wondering what kind of spacers should I put on. And I do not have the ztk package fender.

Also wondering if I get 245/275 tires can I lower the aspect ratio to 35 front and 30 rear? Given that the tire is wider now.

What is that thing sticking out of your trunk?

applecst · 07-18-2023, 12:01 PM

Quote:

Originally Posted by XC3LLR8

What is that thing sticking out of your trunk?

Haha you noticed. It's just a plastic tag. Trunk decoration 😁

XC3LLR8 · 07-18-2023, 12:46 PM

Quote:

Originally Posted by applecst

Need help! I recently got a set of wheels in the following spec and are looking for a good set up:
Front: 8.5 et 25 and Rear: 9.5 et 32

My car is currently lowered (pretty low see pic) wondering what kind of spacers should I put on. And I do not have the ztk package fender.

Also wondering if I get 245/275 tires can I lower the aspect ratio to 35 front and 30 rear? Given that the tire is wider now.

Do you have xDrive? If so, you'll need 35 and 30 if you're going with 245 and 275.

The ZTK wheel specs are 8.5 et25 and 9.5 et35, so you're close to that. I had 13mm spacers all around for what I thought was a perfect fit, and the ZTK fender flares added about 4mm of fender width.

Not sure that helps any, but may give you a reference to work with. I have no idea what would be ideal for a car that's lowered.

applecst · 07-18-2023, 03:48 PM

Quote:

Originally Posted by XC3LLR8

Do you have xDrive? If so, you'll need 35 and 30 if you're going with 245 and 275.

The ZTK wheel specs are 8.5 et25 and 9.5 et35, so you're close to that. I had 13mm spacers all around for what I thought was a perfect fit, and the ZTK fender flares added about 4mm of fender width.

Not sure that helps any, but may give you a reference to work with. I have no idea what would be ideal for a car that's lowered.

Thanks for the input! ya guess i’ll have to play with it.

ya i have xdrive. i don’t see any reference to 35/30 in the forum for a tire set up. that’s why i was asking. not sure if it’s for any particular reason lol.

XC3LLR8 · 07-18-2023, 04:11 PM

Quote:

Originally Posted by applecst

Thanks for the input! ya guess i’ll have to play with it.

ya i have xdrive. i don’t see any reference to 35/30 in the forum for a tire set up. that’s why i was asking. not sure if it’s for any particular reason lol.

With xDrive you need to stay under 1% for the difference in circumference between front and back. You'll see below the OEM setup has a 0.8% difference, and your suggested setup has a 1.2% difference. You could run into transmission overheating issues, but then again you may go 200,000 miles w/o any issues. If you do have transmission issues and BMW notes the tire difference, it could be a warranty denial.

applecst · 07-18-2023, 04:23 PM

Quote:

Originally Posted by XC3LLR8

With xDrive you need to stay under 1% for the difference in circumference between front and back. You'll see below the OEM setup has a 0.8% difference, and your suggested setup has a 1.2% difference. You could run into transmission overheating issues, but then again you may go 200,000 miles w/o any issues. If you do have transmission issues and BMW notes the tire difference, it could be a warranty denial.

ah i see i see. for some reason the calculator i used gave me a 0.99% difference lol. thanks!

XC3LLR8 · 07-18-2023, 04:25 PM

Quote:

Originally Posted by applecst

ah i see i see. for some reason the calculator i used gave me a 0.99% difference lol. thanks!

Then that's the calculator you want to use if BMW gives you grief.

applecst · 07-18-2023, 05:52 PM

Quote:

Originally Posted by XC3LLR8

Then that's the calculator you want to use if BMW gives you grief.

LOLLL

lithe · 07-24-2023, 01:47 PM

So M240i owners can't go big 10" wide front, 11" wide rear wheels?

Was hoping to stuff 275 wide front & 305 wide rear tires...

Is this possible?

XC3LLR8 · 07-24-2023, 04:26 PM

Quote:

Originally Posted by lithe

So M240i owners can't go big 10" wide front, 11" wide rear wheels?

Was hoping to stuff 275 wide front & 305 wide rear tires...

Is this possible?

Depends on offset. Not much room to spare with 9.5 and 265 up front next to strut.

And if you have xDrive, need to be careful with circumference delta between front/back.

applecst · 07-26-2023, 10:24 PM

Share another set up

BBS LM 8.5 et25 / 9.5 et32

245 40 & 275 35

Front 10 mm spacer

M-System · 07-27-2023, 11:01 AM

Overcast skies and dirty car, but this is my RWD 230i with 4mm Dinan spacers (up front only), on 19 inch staggered Supra wheels wrapped with Michelin PS4S 235/40 front, 265/40 rear. Pretty much flush with fenders front and rear, although a bit deceiving in these pictures. Still, I’m glad I have the TLG mud flaps.

G42.Drxw · 08-04-2023, 12:18 PM

Looking at 19 inch wheels. I currently have th ztk package. Seeing a deal on these wheels which front 9.5 + 22 and rear 10.5 et +35. What tire setup would optimal taking in consideration the xdrive. Also plans on lowering the car in eibach springs.

XC3LLR8 · 08-04-2023, 01:50 PM

Quote:

Originally Posted by G42.Drxw

Looking at 19 inch wheels. I currently have th ztk package. Seeing a deal on these wheels which front 9.5 + 22 and rear 10.5 et +35. What tire setup would optimal taking in consideration the xdrive. Also plans on lowering the car in eibach springs.

Why not just buy four of the 9.5's and run a square setup? Your xDrive will thank you for it.

XC3LLR8 · 08-04-2023, 01:54 PM

Quote:

Originally Posted by G42.Drxw

Looking at 19 inch wheels. I currently have th ztk package. Seeing a deal on these wheels which front 9.5 + 22 and rear 10.5 et +35. What tire setup would optimal taking in consideration the xdrive. Also plans on lowering the car in eibach springs.

If you want the 10.5 rears, then 255/35 and 295/30 will be about identical in diameter.

G42.Drxw · 08-04-2023, 01:56 PM

Quote:

Originally Posted by XC3LLR8

Why not just buy four of the 9.5's and run a square setup? Your xDrive will thank you for it.

If i decided this route if 9.5 square would i run the same tires the 255?

XC3LLR8 · 08-04-2023, 02:01 PM

Quote:

Originally Posted by G42.Drxw

If i decided this route if 9.5 square would i run the same tires the 255?

If you have the ZTK package then I'd run a square 265/35 et25 to et20. That's what I'm running and very happy with the looks/performance.

XC3LLR8 · 08-04-2023, 02:02 PM

Quote:

Originally Posted by G42.Drxw

If i decided this route if 9.5 square would i run the same tires the 255?

BTW, I recommended the 255 in your example to keep the circumference roughly the same with a wider rear on the 10.5.

XC3LLR8 · 08-04-2023, 02:04 PM

Quote:

Originally Posted by XC3LLR8

If you have the ZTK package then I'd run a square 265/35 et25 to et20. That's what I'm running and very happy with the looks/performance.

Should have noted this recommendation is for a 9.5 19 all around.

G42.Drxw · 08-04-2023, 02:04 PM

Quote:

Originally Posted by XC3LLR8

If you have the ZTK package then I'd run a square 265/35 et25 to et20. That's what I'm running and very happy with the looks/performance.

Appreciate it! I wouldn’t have no issues lowering the car or needing to run spacers ?

06-07-2023, 11:46 AM	#287
vismajeure New Member 18 Rep 14 Posts Drives: 2023 G4 230i; 2006 Z4 E85 3.0i Join Date: May 2019 Location: Ontario CA iTrader: (0)	BBS CH-R BBS CH-R Front 255 35 19 / Rear 275 35 19 Continental Extremecontact DWS 19x8.5 +32mm offset PLUS 15mm Spacer 19x9.5 +45mm offset PLUS 5mm Spacer (Thinking about going to a 15mm spacer but may rub) 230i lowered on Cobra Suspension Lowering Springs Attached Images
	Appreciate 7 XC3LLR82086.50 peaceindriving228.50 lithe32.50 Coconut807.50 G42.Drxw50.00 aguycalleddb531.50 NoDramaG4260.00 Quote

07-18-2023, 01:25 AM	#288
applecst First Lieutenant 257 Rep 317 Posts Drives: G42 M240i Join Date: Jan 2022 Location: LA iTrader: (0)	Need help! I recently got a set of wheels in the following spec and are looking for a good set up: Front: 8.5 et 25 and Rear: 9.5 et 32 My car is currently lowered (pretty low see pic) wondering what kind of spacers should I put on. And I do not have the ztk package fender. Also wondering if I get 245/275 tires can I lower the aspect ratio to 35 front and 30 rear? Given that the tire is wider now. Attached Images __________________ I doubt, therefore I might be.
	Appreciate 0 Quote

07-24-2023, 01:47 PM	#297
lithe Private 33 Rep 78 Posts Drives: '23 GR Corolla, '17 Tundra Join Date: Jul 2013 Location: Milwaukee, WI iTrader: (0)	So M240i owners can't go big 10" wide front, 11" wide rear wheels? Was hoping to stuff 275 wide front & 305 wide rear tires... Is this possible?
	Appreciate 0 Quote

07-26-2023, 10:24 PM	#299
applecst First Lieutenant 257 Rep 317 Posts Drives: G42 M240i Join Date: Jan 2022 Location: LA iTrader: (0)	Share another set up BBS LM 8.5 et25 / 9.5 et32 245 40 & 275 35 Front 10 mm spacer Attached Images __________________ I doubt, therefore I might be.
	Appreciate 6 ap2x21.00 XC3LLR82086.50 Ultimateone177.00 Andi-M2221.00 VegasG42691.50 Nate48157.50 Quote

07-27-2023, 11:01 AM	#300
M-System Private 81 Rep 84 Posts Drives: E28, G42 Join Date: Jan 2015 Location: NJ USA iTrader: (0)	Overcast skies and dirty car, but this is my RWD 230i with 4mm Dinan spacers (up front only), on 19 inch staggered Supra wheels wrapped with Michelin PS4S 235/40 front, 265/40 rear. Pretty much flush with fenders front and rear, although a bit deceiving in these pictures. Still, I’m glad I have the TLG mud flaps. Attached Images
	Appreciate 2 XC3LLR82086.50 wb8164159.50 Quote

08-04-2023, 12:18 PM	#301
G42.Drxw Private 50 Rep 60 Posts Drives: BMW M240i Join Date: Mar 2022 Location: Philadelphia iTrader: (0) Garage List 2022 BMW M240I [0.00]	Looking at 19 inch wheels. I currently have th ztk package. Seeing a deal on these wheels which front 9.5 + 22 and rear 10.5 et +35. What tire setup would optimal taking in consideration the xdrive. Also plans on lowering the car in eibach springs.
	Appreciate 0 Quote