265/35/18 and 265/40/18 on 9.5 square

SwagMuffin · 07-13-2023, 10:06 PM

Any issues if I run 265/35 and 265/40 rear on square 9.5 219m?

Reason I ask is because I have these tires already in the garage.

Will this setup interfere with Dsc?

TboneS54 · 07-14-2023, 11:24 AM

The car from factory has a taller rear anyway (245/40 to 265/40), so it might be ok. That's still an entire profile size difference. I wouldn't do it.

SwagMuffin · 07-14-2023, 08:43 PM

Thanks for the advice. I guess I could grab a pair of 275/35 for the rear… my 265/40 is still fresh. Bummer

TboneS54 · 07-15-2023, 03:10 PM

275/35 is smaller than 265/40, so you may upset dsc since stock, the system is expecting a taller rear, not shorter.

SwagMuffin · 07-15-2023, 03:15 PM

Yep I will run 35 profiles 265/275

mugrug01 · 07-16-2023, 07:26 AM

Is 285/35 an option in the rear? I’ve read mixed opinions. I’m in the same boat as OP.

275/35 smaller than stock
275/40 taller than stock
285/35 same diameter but too wide??

Z K · 08-01-2023, 06:34 PM

Why run staggered tires on square fitment wheels? You should be fine to run 275/35 square on a square rim set up. That's what I run on my 18x9.5 wheels for track.

265/35 is thinner than stock for the front. 275/35 is the same diameter as stock for front. If the OP had wider rear wheels, I'd do 275/35 front and 285/35 rear.

e92BMW///M3 · 08-23-2023, 08:49 AM

I’ve run 265/35 with 285/35 and also 275/35 with 285/35, both without issue.

Also contemplating 295/30 with 295/35 which based on the stagger/diameter I wouldn’t expect an issue.

07-13-2023, 10:06 PM	#1
SwagMuffin Private First Class 17 Rep 110 Posts Drives: E90 M3 Join Date: Jun 2017 Location: San Francisco iTrader: (2)	265/35/18 and 265/40/18 on 9.5 square Any issues if I run 265/35 and 265/40 rear on square 9.5 219m? Reason I ask is because I have these tires already in the garage. Will this setup interfere with Dsc?
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07-14-2023, 11:24 AM	#2
TboneS54 YNWA 1043 Rep 813 Posts Drives: 2004 M3 6spd & 2011 M3 DCT Join Date: Nov 2009 Location: SoCal iTrader: (2)	The car from factory has a taller rear anyway (245/40 to 265/40), so it might be ok. That's still an entire profile size difference. I wouldn't do it. __________________ /// 2004 Silvergrey M3 · Coupe · 6MT · Slicktop · zero options /// 2011 Jerez/Bamboo E90 M3 · DCT · Slicktop · IG: @na.s54
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07-14-2023, 08:43 PM	#3
SwagMuffin Private First Class 17 Rep 110 Posts Drives: E90 M3 Join Date: Jun 2017 Location: San Francisco iTrader: (2)	Thanks for the advice. I guess I could grab a pair of 275/35 for the rear… my 265/40 is still fresh. Bummer
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07-15-2023, 03:10 PM	#4
TboneS54 YNWA 1043 Rep 813 Posts Drives: 2004 M3 6spd & 2011 M3 DCT Join Date: Nov 2009 Location: SoCal iTrader: (2)	275/35 is smaller than 265/40, so you may upset dsc since stock, the system is expecting a taller rear, not shorter. __________________ /// 2004 Silvergrey M3 · Coupe · 6MT · Slicktop · zero options /// 2011 Jerez/Bamboo E90 M3 · DCT · Slicktop · IG: @na.s54
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07-15-2023, 03:15 PM	#5
SwagMuffin Private First Class 17 Rep 110 Posts Drives: E90 M3 Join Date: Jun 2017 Location: San Francisco iTrader: (2)	Yep I will run 35 profiles 265/275
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07-16-2023, 07:26 AM	#6
mugrug01 New Member 8 Rep 13 Posts Drives: 2010 E90 M3 AW/FR 6MT Join Date: Oct 2020 Location: Ocean Pines, MD iTrader: (0)	Is 285/35 an option in the rear? I’ve read mixed opinions. I’m in the same boat as OP. 275/35 smaller than stock 275/40 taller than stock 285/35 same diameter but too wide??
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08-01-2023, 06:34 PM	#7
Z K Major General 1889 Rep 5,506 Posts Drives: E90 M3, G20 M340i Join Date: Jul 2011 Location: San Francisco iTrader: (3)	Why run staggered tires on square fitment wheels? You should be fine to run 275/35 square on a square rim set up. That's what I run on my 18x9.5 wheels for track. 265/35 is thinner than stock for the front. 275/35 is the same diameter as stock for front. If the OP had wider rear wheels, I'd do 275/35 front and 285/35 rear. __________________ Auto Detailing Enthusiast!
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08-23-2023, 08:49 AM	#8
e92BMW///M3 Second Lieutenant 123 Rep 286 Posts Drives: e92 M3 Join Date: Nov 2015 Location: NJ iTrader: (3)	I’ve run 265/35 with 285/35 and also 275/35 with 285/35, both without issue. Also contemplating 295/30 with 295/35 which based on the stagger/diameter I wouldn’t expect an issue.
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