255/40/18 on 135i

NinjaDog · 03-04-2018, 05:12 PM

Hi all. Just wondering if I will have any fitment issues with a 255/40/18 square setup.
Suggestions on rim width would also be appreciated

Cheers

dane083 · 03-05-2018, 08:09 AM

Search dude, it's not that hard

Gangplank · 03-05-2018, 12:04 PM

Let's see... going from 215/40/18 to 255/40/18. Let's see the section width goes from 8.6" on a 7.5" rim to 10.2" on an 8.5" rim (min. rim you should use for 255). That's 1.6" wider or 40mm give or take. Any fitment issues... depends on how you define issues.

Short answer, yes. Can it be done yes. How? See above suggestion by dane083

NinjaDog · 03-05-2018, 03:33 PM

Cool thanks guys

BimmerAg · 03-05-2018, 04:42 PM

If you're on stock suspension, it can be done pretty easily with the right wheel offsets. I've run 255/40R17 square Federal RSRR's with no problems. If you're lowered, you'll need camber to clear the fender lips and maybe a fender roll

Delisic · 03-14-2018, 06:03 PM

Wow!!!!
Why did I wait so long to change the RFT!!!!&^%$#
Holley smokes, the RFT sucks!!!!
Just changed my tires to 225/40R18 92Y and 255/35R18 94Y!!!! What a difference on the ride quality! Its almost like a new car!! After changing out the RFT, right away i felt the difference on the ride. Getting on the Highway was like "Wow".....

jktobin1 · 03-16-2018, 10:15 PM

I'm looking to try and fit a 265 on the rear with a 9.5" et50 offset VMR wheel. I have read elsewhere that I will most likely have rubbing issues with a lot of weight in the car and I was wondering if anyone else has tried this and possibly rolling the fenders? Any help or links would be appreciated where I could find the information I need

mack128i · 03-18-2018, 07:21 PM

Hey Jimmy, you would want to go with an aspect ration of 35 on the rears to keep the normal speed vs tire RPMS...Google up tire calculator and it will give you all the information needed to help you make a decision on current fitment, vs new fitment...

You def wanna stay with a 45NT

03-04-2018, 05:12 PM	#1
NinjaDog Private First Class 20 Rep 126 Posts Drives: BMW 135i Join Date: Feb 2018 Location: Sydney, Australia iTrader: (0)	255/40/18 on 135i Hi all. Just wondering if I will have any fitment issues with a 255/40/18 square setup. Suggestions on rim width would also be appreciated Cheers
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03-05-2018, 08:09 AM	#2
dane083 Private First Class 19 Rep 126 Posts Drives: 2011 135i Join Date: Jul 2015 Location: Melbourne Aus iTrader: (0)	Search dude, it's not that hard
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03-05-2018, 12:04 PM	#3
Gangplank Brigadier General 1542 Rep 3,071 Posts Drives: 2011 e82 135i n55 Sport w/ DCT Join Date: Nov 2015 Location: Vero Beach, FL iTrader: (2) Garage List 2011 135i [0.00]	Let's see... going from 215/40/18 to 255/40/18. Let's see the section width goes from 8.6" on a 7.5" rim to 10.2" on an 8.5" rim (min. rim you should use for 255). That's 1.6" wider or 40mm give or take. Any fitment issues... depends on how you define issues. Short answer, yes. Can it be done yes. How? See above suggestion by dane083 __________________ 2011 135i w/ DCT \| ZSP Sport Pkg \| PPK \| Ohlins R
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03-05-2018, 03:33 PM	#4
NinjaDog Private First Class 20 Rep 126 Posts Drives: BMW 135i Join Date: Feb 2018 Location: Sydney, Australia iTrader: (0)	Cool thanks guys
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03-05-2018, 04:42 PM	#5
BimmerAg Lieutenant 425 Rep 545 Posts Drives: 2011 135i Join Date: May 2017 Location: San Antonio, TX iTrader: (0)	If you're on stock suspension, it can be done pretty easily with the right wheel offsets. I've run 255/40R17 square Federal RSRR's with no problems. If you're lowered, you'll need camber to clear the fender lips and maybe a fender roll __________________ 2011 BMW 135i ///M-Sport, DCT Bilstein B12 kit, Dinan camber plates, M3 front control arms, Whiteline poly RSFB, MHD Stage 1, cp-e Charge Pipe, H&R Front sway bar, BMW performance diffuser
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03-14-2018, 06:03 PM	#6
Delisic Enlisted Member 23 Rep 38 Posts Drives: 135i convertible Join Date: May 2017 Location: Honolulu iTrader: (0)	Wow!!!! Why did I wait so long to change the RFT!!!!&^%$# Holley smokes, the RFT sucks!!!! Just changed my tires to 225/40R18 92Y and 255/35R18 94Y!!!! What a difference on the ride quality! Its almost like a new car!! After changing out the RFT, right away i felt the difference on the ride. Getting on the Highway was like "Wow".....
	Appreciate 0 Quote

03-16-2018, 10:15 PM	#7
jktobin1 Private 7 Rep 55 Posts Drives: 2012 BMW 135i Join Date: Apr 2017 Location: Arizona iTrader: (0)	I'm looking to try and fit a 265 on the rear with a 9.5" et50 offset VMR wheel. I have read elsewhere that I will most likely have rubbing issues with a lot of weight in the car and I was wondering if anyone else has tried this and possibly rolling the fenders? Any help or links would be appreciated where I could find the information I need
	Appreciate 0 Quote

03-18-2018, 07:21 PM	#8
mack128i 1er 10 Rep 49 Posts Drives: 2013 128i e82 Join Date: Mar 2018 Location: Texas iTrader: (0)	Hey Jimmy, you would want to go with an aspect ration of 35 on the rears to keep the normal speed vs tire RPMS...Google up tire calculator and it will give you all the information needed to help you make a decision on current fitment, vs new fitment... You def wanna stay with a 45NT
	Appreciate 0 Quote