tire size on type 189 wheels

redlinedbimmer · 07-04-2012, 06:27 AM

I am mounting some type 189s on my e90 328, the fronts already have 245/45/18s on them, but I need new tires for the rear, going to get some used ones off craigslist, can I run 245/40/18s? how does this affect things? Or should I run 245/45/18?

redlinedbimmer · 07-04-2012, 08:05 PM

somebody has to know!

wdeerfield · 07-05-2012, 08:06 AM

thats a 3.6% difference in diameter from the front to back. i would recommend keeping it the same

remmib · 07-05-2012, 02:07 PM

245/45/18 is really big on an e9x, even 245/40/18 is on the large side.

redlinedbimmer · 07-06-2012, 06:36 AM

seems like everybody with oem 18s run these sizes, I plan on running 245/45/18 in front, and 255/40/18 rear, thats what many people run on their 335s and it should fit exactly the same on my e90 328 correct? no spacers....

turo · 07-06-2012, 10:00 AM

I can't say that I've seen too many 335s with 245/45/18s. The most common tire sizes in the front are 225/40/18 (oem) and 235/40/18. The 245/45 is a big tire!

VMRWheels · 07-06-2012, 11:44 AM

Quote:

Originally Posted by turo

I can't say that I've seen too many 335s with 245/45/18s. The most common tire sizes in the front are 225/40/18 (oem) and 235/40/18. The 245/45 is a big tire!

245/45 is huge. Generally you'll want a 225/40/18-235/40/18 front. 245/35/18-255/35/18 rear, on a staggered setup of course.

Use this to determine the overall diameter/circumference/speedometer difference: http://www.1010tires.com/TireSizeCalculator.asp

GermanMuscle · 09-03-2012, 08:51 PM

Front = 225/40r18
Rear = 255/35r18

07-04-2012, 06:27 AM	#1
redlinedbimmer Private First Class 10 Rep 191 Posts Drives: 2008 328i 6 speed Join Date: May 2011 Location: Chicago iTrader: (0)	tire size on type 189 wheels I am mounting some type 189s on my e90 328, the fronts already have 245/45/18s on them, but I need new tires for the rear, going to get some used ones off craigslist, can I run 245/40/18s? how does this affect things? Or should I run 245/45/18?
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07-04-2012, 08:05 PM	#2
redlinedbimmer Private First Class 10 Rep 191 Posts Drives: 2008 328i 6 speed Join Date: May 2011 Location: Chicago iTrader: (0)	somebody has to know!
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07-05-2012, 08:06 AM	#3
wdeerfield A family of bimmers 2748 Rep 7,742 Posts Drives: '18 G01 X3M40i Join Date: Jan 2012 Location: Clifton Park, NY iTrader: (0)	thats a 3.6% difference in diameter from the front to back. i would recommend keeping it the same __________________ 2018 PB/Black G01 X3M40i \| 699M \| ZDA \| ZPP \| ZPX \| Maxton front lip \| X3M vents \| 15mm Spacers \| Diamond G20 style grills
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07-05-2012, 02:07 PM	#4
remmib General 1569 Rep 29,202 Posts Drives: 2013 F10 520d M-Sport Join Date: Feb 2006 Location: Norway iTrader: (0)	245/45/18 is really big on an e9x, even 245/40/18 is on the large side. __________________ 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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07-06-2012, 06:36 AM	#5
redlinedbimmer Private First Class 10 Rep 191 Posts Drives: 2008 328i 6 speed Join Date: May 2011 Location: Chicago iTrader: (0)	seems like everybody with oem 18s run these sizes, I plan on running 245/45/18 in front, and 255/40/18 rear, thats what many people run on their 335s and it should fit exactly the same on my e90 328 correct? no spacers....
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07-06-2012, 10:00 AM	#6
turo Lieutenant 163 Rep 467 Posts Drives: Yes Join Date: Jul 2011 Location: North VA iTrader: (2) Garage List 2011 BMW 335i [8.40] 2024 BMW M2 [9.00] 2018 BMW 340i XDrive [10.00]	I can't say that I've seen too many 335s with 245/45/18s. The most common tire sizes in the front are 225/40/18 (oem) and 235/40/18. The 245/45 is a big tire!
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09-03-2012, 08:51 PM	#8
GermanMuscle Once you drive a Bimmer, you always drive a Bimmer 19 Rep 259 Posts Drives: 2011 e90 Join Date: May 2012 Location: Atlanta iTrader: (1)	Front = 225/40r18 Rear = 255/35r18
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