Ideal tire size on 18\" wheel

ttbmer · 12-12-2011, 01:24 AM

Guys I just order a new set of matt Black forgestars 18\". 18x8.5 et30 and 18x10 ET38 rear. I want something that looks beefy, meaty. I already order PSS 255/35/18 and 275/35/17 but I was thinking may be a 255/40/18 and 275/40/rear would look more aggressive. Would this profile throw my speedometer off or would it be too hash on my breaks. My previous set up was AD08s 245/35/19 no rub and 275/30/19 no rub.
Also not sure if the PSS run on 40 profile or not.

Thank for the help.

ttbmer · 12-12-2011, 12:19 PM

Anyone?

John_01 · 12-12-2011, 02:43 PM

255/40/18 is too big in diameter to fit on the front. 255/35/18 front tire that you ordered is already going to be a tight fit to get under the fender at ET30. You may need some extra negative camber to make it fit.

ttbmer · 12-12-2011, 03:34 PM

Quote:

Originally Posted by John_01

255/40/18 is too big in diameter to fit on the front. 255/35/18 front tire that you ordered is already going to be a tight fit to get under the fender at ET30. You may need some extra negative camber to make it fit.

Thank u for posting. I'm runing m3 suspention bit, that adds .5 negative chamber space. What u think?

JTO24 · 12-14-2011, 12:00 PM

please post pics of your set-up! I'm looking into 18" f14's too

John_01 · 12-14-2011, 05:41 PM

Quote:

Originally Posted by ttbmer

Thank u for posting. I'm runing m3 suspention bit, that adds .5 negative chamber space. What u think?

The M3 wishbones are longer than the stock ones - It works by moving the hub outwards. Because the top of the strut is still fixed in the same position, I don't think it helps with fender clearance.

If you have trouble with fender clearance of 255/35/18 at ET30, its better to move the top of the strut inwards. Either cutting the alignment pin or maybe get the fixed camber plates from Dinan. If you do both mods, I think it adds around 1 degree in total.

ttbmer · 12-14-2011, 06:37 PM

Quote:

Originally Posted by JTO24

please post pics of your set-up! I'm looking into 18" f14's too

I have pictures of my previous set up, same wheel same color just 19". Pm ur email if u want too pics

ttbmer · 12-14-2011, 06:38 PM

Quote:

Originally Posted by John_01

Quote:

Originally Posted by ttbmer

Thank u for posting. I'm runing m3 suspention bit, that adds .5 negative chamber space. What u think?

The M3 wishbones are longer than the stock ones - It works by moving the hub outwards. Because the top of the strut is still fixed in the same position, I don't think it helps with fender clearance.

If you have trouble with fender clearance of 255/35/18 at ET30, its better to move the top of the strut inwards. Either cutting the alignment pin or maybe get the fixed camber plates from Dinan. If you do both mods, I think it adds around 1 degree in total.

Make sense. Thank u. Still I think I should be good. I had 245/35/19 before no rubbing ever on ET32. Square tire too.

12-12-2011, 01:24 AM	#1
ttbmer Lieutenant Colonel 68 Rep 1,943 Posts Drives: space gray on black 07 335i Join Date: Jul 2010 Location: las Vegas nv iTrader: (15)	Ideal tire size on 18\" wheel Guys I just order a new set of matt Black forgestars 18\". 18x8.5 et30 and 18x10 ET38 rear. I want something that looks beefy, meaty. I already order PSS 255/35/18 and 275/35/17 but I was thinking may be a 255/40/18 and 275/40/rear would look more aggressive. Would this profile throw my speedometer off or would it be too hash on my breaks. My previous set up was AD08s 245/35/19 no rub and 275/30/19 no rub. Also not sure if the PSS run on 40 profile or not. Thank for the help. __________________ PROCEDE, PWM Vishnu Kit, AR catless DP, BMS DCI, Helix IC, P3 gauge, 25% window tint, mattblack window trim, mattblack roof wrapped. Vorstainer CSL trunk, CF wrapped interior, 18'' Forgestar F14 Matt black, quaife LSD, M3 suspension bits, Mtech front bumper). http://www.youtube.com/watch?v=b8JIB8C8HDA
	Appreciate 0 Tweet Quote

12-12-2011, 12:19 PM	#2
ttbmer Lieutenant Colonel 68 Rep 1,943 Posts Drives: space gray on black 07 335i Join Date: Jul 2010 Location: las Vegas nv iTrader: (15)	Anyone? __________________ PROCEDE, PWM Vishnu Kit, AR catless DP, BMS DCI, Helix IC, P3 gauge, 25% window tint, mattblack window trim, mattblack roof wrapped. Vorstainer CSL trunk, CF wrapped interior, 18'' Forgestar F14 Matt black, quaife LSD, M3 suspension bits, Mtech front bumper). http://www.youtube.com/watch?v=b8JIB8C8HDA
	Appreciate 0 Quote

12-12-2011, 02:43 PM	#3
John_01 Colonel 232 Rep 2,643 Posts Drives: E90 325i, E82 135i Join Date: Mar 2009 Location: Sydney, Australia iTrader: (0)	255/40/18 is too big in diameter to fit on the front. 255/35/18 front tire that you ordered is already going to be a tight fit to get under the fender at ET30. You may need some extra negative camber to make it fit.
	Appreciate 0 Quote

12-14-2011, 12:00 PM	#5
JTO24 never could compete with Lloyd Braun 5276 Rep 5,378 Posts Drives: 2022 G80 M3 6MT Join Date: Feb 2011 Location: South Jersey iTrader: (7)	please post pics of your set-up! I'm looking into 18" f14's too __________________ 2022 G80 M3 6MT \| Skyscraper Gray \| Kyalami Orange 2018 F87 M2 6MT \| Alpine White (sold) 2016 981 Cayman 6MT \| Jet Black (sold) 2015 F80 M3 DCT \| Tanzanite Blue \| Gold Brown (sold) 2013 E92 M3 6MT \| Mineral White \| Fox Red/Black (sold)
	Appreciate 0 Quote