235 and 245 upfront?? What will happen

mdrivera · 01-22-2010, 12:33 PM

I just blew a tire on a pothole and need to get it replaced. Have a 235/40/18 on there already but I found a 245/40/18 for REALLY cheap with the same tread. Will it cause any issues to run the two different sizes?

remmib · 01-22-2010, 12:43 PM

That doesn't sound like good idea, is that even legal?

mdrivera · 01-22-2010, 12:45 PM

Quote:

Originally Posted by remmib

That doesn't sound like good idea, is that even legal?

No idea...hoping someone can shed some light.

Zürcher · 01-22-2010, 01:48 PM

Quote:

Originally Posted by mdrivera

I just blew a tire on a pothole and need to get it replaced. Have a 235/40/18 on there already but I found a 245/40/18 for REALLY cheap with the same tread. Will it cause any issues to run the two different sizes?

are you serious?! how much cheaper is the 245 tire?

howiedds · 01-22-2010, 02:45 PM

do it right and buy 2- 245 tires up front...dont be cheap.you'll regret it!... we drive such a nice car! Do it right!

samej · 01-22-2010, 02:45 PM

your ABS and DSC will go apes**t.

therealm3 · 01-22-2010, 06:32 PM

two different rolling diameters is not a good idea for so many reasons. Just dont' do it.

Why do people so easily cheap out on tires? It's the signle most important thing on the car. It does everything.... accelerate, brake, turn, etc... literally the only part of the car that touches the road.

mt3c · 01-22-2010, 08:40 PM

Quote:

Originally Posted by mdrivera

I just blew a tire on a pothole and need to get it replaced. Have a 235/40/18 on there already but I found a 245/40/18 for REALLY cheap with the same tread. Will it cause any issues to run the two different sizes?

You want to use the same size tire on the same axle. If the 245 is cheap, buy two of them.

On a handling level, left/right turns won't be the same.
On a system level, it may affect the traction control and abs, as it will sense the one wheel turning faster then the other.

NiVeDh · 01-22-2010, 10:16 PM

Quote:

Originally Posted by therealm3

two different rolling diameters is not a good idea for so many reasons. Just dont' do it.

Why do people so easily cheap out on tires? It's the signle most important thing on the car. It does everything.... accelerate, brake, turn, etc... literally the only part of the car that touches the road.

Gary@TireRack · 01-23-2010, 12:13 PM

Do not mix tires of different overall diameters on the same axle.

mdrivera · 01-23-2010, 01:09 PM

Thanks all. Yeah I am just gonna get brand new ones for the front. I was just asking 'cause I didn't know. I appreciate everybody who gave non-patronizing answers!!

midlife · 01-24-2010, 11:14 AM

Quote:

Originally Posted by mt3c

You want to use the same size tire on the same axle. If the 245 is cheap, buy two of them.

On a handling level, left/right turns won't be the same.
On a system level, it may affect the traction control and abs, as it will sense the one wheel turning faster then the other.

OT:
A well known rim maker told me I could put 245 or 255 tires all around for opimal highway handling.
My tire guy told me 245 or 255 up front are too big for my e93.

Who is right ??

stressdoc · 01-27-2010, 06:46 PM

I would not go bigger than 235 for the street.

Malek@MRF · 01-27-2010, 09:24 PM

Quote:

Originally Posted by midlife

OT:
A well known rim maker told me I could put 245 or 255 tires all around for opimal highway handling.
My tire guy told me 245 or 255 up front are too big for my e93.

Who is right ??

255 up front would be really nice actually, along with 275 rears.

Mike01ci · 02-17-2010, 10:16 AM

If you want to match your 245, you could buy this from me.... http://www.e90post.com/forums/showth...=245%2F40%2F18

AlanAZ · 02-17-2010, 11:21 AM

Quote:

I would not go bigger than 235 for the street.

+1

discoboy1 · 02-17-2010, 01:09 PM

Two different sizes on the front, and for sure you car will pull on one side.

Gavin@MMW · 02-17-2010, 01:19 PM

the 235 tire will turn to goo and melt off, causing you to initiate a horrific flat spin into an on coming Mack Truck. You will try to correct it, but sadly it wont help.

So get the right size tires.

01-22-2010, 12:33 PM	#1
mdrivera Lieutenant 17 Rep 450 Posts Drives: e90 Deep Green Metallic Join Date: Oct 2009 Location: NYC iTrader: (5)	235 and 245 upfront?? What will happen I just blew a tire on a pothole and need to get it replaced. Have a 235/40/18 on there already but I found a 245/40/18 for REALLY cheap with the same tread. Will it cause any issues to run the two different sizes?
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01-22-2010, 12:43 PM	#2
remmib General 1582 Rep 29,215 Posts Drives: 2013 F10 520d M-Sport Join Date: Feb 2006 Location: Norway iTrader: (0)	That doesn't sound like good idea, is that even legal? __________________ F10 520d M-Sport Alpine White \| HRE P43SC 20x9+20x11 \| Michelin PSS 255/35+295/30 \| KW V3 Coilover \| M5 Front Sway Bar + M550d Rear Sway Bar \| 3DDesign Front Lip \| BMW M Performance CF Spoiler \| BMW M Performance Diffuser \| BMW M Performance Black Grills \| BMW M Performance Pedals \|
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01-22-2010, 02:45 PM	#5
howiedds D.D.S. 31 Rep 460 Posts Drives: 12 AW E70 X5d Join Date: Sep 2009 Location: Brooklyn, NY iTrader: (5)	do it right and buy 2- 245 tires up front...dont be cheap.you'll regret it!... we drive such a nice car! Do it right!
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01-22-2010, 02:45 PM	#6
samej First Lieutenant 26 Rep 345 Posts Drives: 2017 F22 M240i xDrive MG Join Date: Jun 2009 Location: Ottawa iTrader: (0)	your ABS and DSC will go apes**t.
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01-22-2010, 06:32 PM	#7
therealm3 Lieutenant Colonel 641 Rep 1,655 Posts Drives: F30 340 MSport Join Date: Aug 2006 Location: CA, USA iTrader: (7)	two different rolling diameters is not a good idea for so many reasons. Just dont' do it. Why do people so easily cheap out on tires? It's the signle most important thing on the car. It does everything.... accelerate, brake, turn, etc... literally the only part of the car that touches the road.
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01-23-2010, 12:13 PM	#10
Gary@TireRack Moderator 372 Rep 4,742 Posts Drives: Formerly 1995 M3 Join Date: Oct 2006 Location: South Bend, IN, Tire Rack HQ iTrader: (2)	Do not mix tires of different overall diameters on the same axle. __________________ Gary. Tire and Wheel Forum Moderator. Tire Rack Sales Rep Gary@Tirerack.com http://www.tirerack.com/a.jsp?a=AH8&url=index.jsp Please refer to 'Gary/E90 Post' as your previous contact when you order online to help support this forum.
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01-23-2010, 01:09 PM	#11
mdrivera Lieutenant 17 Rep 450 Posts Drives: e90 Deep Green Metallic Join Date: Oct 2009 Location: NYC iTrader: (5)	Thanks all. Yeah I am just gonna get brand new ones for the front. I was just asking 'cause I didn't know. I appreciate everybody who gave non-patronizing answers!!
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01-27-2010, 06:46 PM	#13
stressdoc Moderator 657 Rep 10,863 Posts Drives: BMW i8; Toy 4runner TRD pro Join Date: Jun 2005 Location: Waco TX iTrader: (0)	I would not go bigger than 235 for the street. __________________ My recent ED photos: http://f80.bimmerpost.com/forums/sho....php?t=1026808 my not-so-recent ED: http://www.e90post.com/forums/showthread.php?t=31829 Please join BMWCCA http://bmwcca.org/index.php?pageid=c...&ref_by=300279
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02-17-2010, 10:16 AM	#15
Mike01ci First Lieutenant 78 Rep 345 Posts Drives: 16 M2 & 03 M5 Join Date: Sep 2006 Location: Detroit, MI iTrader: (5)	If you want to match your 245, you could buy this from me.... http://www.e90post.com/forums/showth...=245%2F40%2F18 __________________ 16 M2 & 03 M5 - current 95 540i- sold, 09 135i - sold, 08 335i - sold, 07 335i - sold, 10 550i - sold, 99 m3 - sold, 06 m3 - sold (regret). 01 325ci - sold/gone/my 1st car, (later found abandoned in a field w/ fire damage).
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02-17-2010, 01:09 PM	#17
discoboy1 Lieutenant Colonel 125 Rep 1,555 Posts Drives: E82 1M VO/F30 328D Join Date: Mar 2005 Location: Montreal iTrader: (3)	Two different sizes on the front, and for sure you car will pull on one side. __________________ 2011 E82 1M VO 2013 F84 35i VO
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02-17-2010, 01:19 PM	#18
Gavin@MMW Brigadier General 430 Rep 3,879 Posts Drives: MMW Supercharged E90 328i Join Date: Nov 2009 Location: 818/805 iTrader: (18)	the 235 tire will turn to goo and melt off, causing you to initiate a horrific flat spin into an on coming Mack Truck. You will try to correct it, but sadly it wont help. So get the right size tires.
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