Need help with 20" tire sizes

STOOF · 03-31-2017, 08:53 PM

Whatsup guys.

Just picked up a set of BC Forged RS41 20x9.5 +20; 20x11 +40

I'm in NYC so roads are shitty. I want to put the most meat I can on the fronts, so did some math and 255/35/20 F and 295/30/20 R are almost exactly the same OD.

I know most ppl go with 265/30 295/30 but that's 10mm less sidewall upfront.

Anyone know if ill be good with the 255/35 295/30 setup?

Thanks

-JLT- · 04-03-2017, 05:11 AM

u should be good if OD of tire is almost same from stock. r u lowered?

Dippydo · 04-03-2017, 12:34 PM

I'm running 275/30 up front and it is very close to the rear diameter of 295/30. At like 1.x%. No rubbing either with same size and spec wheel as yours plus I am lowered 1" in front.

STOOF · 04-04-2017, 11:31 PM

Quote:

Originally Posted by -JLT-

u should be good if OD of tire is almost same from stock. r u lowered?

they arent the same OD as stock, they would just be the same OD front and rear.

I have the HAS kit i just havent installed it yet, wouldnt be slamming it either, just bring it down to top of the tire.

Quote:

Originally Posted by Dippydo

I'm running 275/30 up front and it is very close to the rear diameter of 295/30. At like 1.x%. No rubbing either with same size and spec wheel as yours plus I am lowered 1" in front.

Your OD is 26.5", mine would be 27.03"

domino_z · 04-05-2017, 11:41 PM

i would love to run a 35 series front tyre on my zcp for exact reasons you point out

ideally i'd like to run the same tyre setup as the m5 - 265/35/20 and 295/30/20 as they use same size rim as zcp

however looking at how close the front sidewall comes to the inner fender liner on lock, i just don't think the taller OD of even a 255/35/20 (27") vs oe zcp 265/30/20 (26.3") will fit

ruley74 · 04-09-2017, 06:53 PM

Hi there,

I just picked up a 2yr old M4 and it has Koya 20 inch rims fitted, the front tyre is a 255/35 and has little to no issues with rubbing. Car also has KW height adjustable springs and has been lowered about 15mm at the front.

Cheers,

STOOF · 04-09-2017, 07:41 PM

Quote:

Originally Posted by ruley74

Hi there,

I just picked up a 2yr old M4 and it has Koya 20 inch rims fitted, the front tyre is a 255/35 and has little to no issues with rubbing. Car also has KW height adjustable springs and has been lowered about 15mm at the front.

Cheers,

Thanks. Glad to here cause I just got a set in that size delivered yesterday lol

03-31-2017, 08:53 PM	#1
STOOF Sunburned 238 Rep 1,097 Posts Drives: '16 F83 M4 Convertible 6MT Join Date: Jul 2009 Location: Staten Island, NY iTrader: (2) Garage List 2013 BMW 535i [0.00]	Need help with 20" tire sizes Whatsup guys. Just picked up a set of BC Forged RS41 20x9.5 +20; 20x11 +40 I'm in NYC so roads are shitty. I want to put the most meat I can on the fronts, so did some math and 255/35/20 F and 295/30/20 R are almost exactly the same OD. I know most ppl go with 265/30 295/30 but that's 10mm less sidewall upfront. Anyone know if ill be good with the 255/35 295/30 setup? Thanks __________________ 2016 M4 Convertible 6MT - SO/SO 2013 535i 6MT MSport - Retired 2011 Z4 SDrive35i 6MT- Retired
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04-03-2017, 05:11 AM	#2
-JLT- Brigadier General 3446 Rep 4,186 Posts Drives: '22 X4M COMP, '23 iX xDrive50 Join Date: Dec 2006 Location: CHITOWN iTrader: (1)	u should be good if OD of tire is almost same from stock. r u lowered? __________________ -JLT-
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04-03-2017, 12:34 PM	#3
Dippydo Lieutenant Colonel 230 Rep 1,556 Posts Drives: 2023 M8 Comp Join Date: May 2013 Location: Katy, TX iTrader: (0) Garage List 2012 BMW [1.00]	I'm running 275/30 up front and it is very close to the rear diameter of 295/30. At like 1.x%. No rubbing either with same size and spec wheel as yours plus I am lowered 1" in front.
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04-05-2017, 11:41 PM	#5
domino_z Lieutenant Colonel 1249 Rep 1,973 Posts Drives: F-Pace SVR Join Date: Apr 2008 Location: Australia iTrader: (0)	i would love to run a 35 series front tyre on my zcp for exact reasons you point out ideally i'd like to run the same tyre setup as the m5 - 265/35/20 and 295/30/20 as they use same size rim as zcp however looking at how close the front sidewall comes to the inner fender liner on lock, i just don't think the taller OD of even a 255/35/20 (27") vs oe zcp 265/30/20 (26.3") will fit Last edited by domino_z; 04-05-2017 at 11:48 PM..
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04-09-2017, 06:53 PM	#6
ruley74 Lost Motorcyclist 167 Rep 379 Posts Drives: 2021 X3M F97 Join Date: Mar 2017 Location: Brisbane, Australia iTrader: (0)	Hi there, I just picked up a 2yr old M4 and it has Koya 20 inch rims fitted, the front tyre is a 255/35 and has little to no issues with rubbing. Car also has KW height adjustable springs and has been lowered about 15mm at the front. Cheers,
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