Z4 3.0i - recommended tire size?

bbiess · 07-27-2012, 12:09 PM

I'm purchasing an '04 3.0i with factory 18"s that needs tires. Based on very favorable reviews of the Michelin Pilot Super Sports I'd like to pick up a set, but have a question about size.

Based on OEM specs Discount Tire is quoting 225/40ZR18XL for the front and 255/35ZR18XL for the rear. Do I just go with those or do I go a bit wider? Will I run into any issues by doing so?

I plan on mostly street driving, however, I'd like to do a little autocrossing and light track as well.

Thoughts, suggestions and comments are greatly appreciated!

Kurumi · 07-27-2012, 12:41 PM

You should be able to go +1 size up (e.g. 235/40/18 and 265/35/18 respectively). I am running those on my Style 108s without any issues.

bbiess · 07-27-2012, 01:00 PM

Cool. Really dumb question though (from a newbie): Will they work on 107s as well?

pyo · 07-27-2012, 04:07 PM

I'd like to know as well for 107s

pmmjarrett · 07-27-2012, 09:24 PM

Not a dumb question unless you didn't ask.

107s and 108s are the exact same width and backspacing

18x8 ET47 front
18x8.5 ET50 rear

pokeybritches · 07-28-2012, 11:53 PM

I would be inclined to keep the stock sizes due to speedo error, and a 265 width tires on 8.5" wheels is on the stuffed side.

GomboRombo · 07-29-2012, 01:37 PM

Quote:

Originally Posted by Kurumi

You should be able to go +1 size up (e.g. 235/40/18 and 265/35/18 respectively). I am running those on my Style 108s without any issues.

Would you please post some close up pics? I want to do this on my 108s as well but I was told it was not recommended and would bulge out.

bbiess · 07-31-2012, 07:24 PM

I think I'm leaning toward stock sizes for the reasons mentioned. What are your thoughts on spacers? I've seen numerous posts about them and they interest me especially when going through the process of having new tires mounted. Is their sole purpose to simply push your wheels/tires outward for cosmetic reasons? Do we like them? Do they effect driving characteristics? What size spacers on a 3.0i with stock size 18" wheels/tires?

07-27-2012, 12:09 PM	#1
bbiess Private Drives: 2004 3.0i - Sterling Gray Join Date: Jun 2012 Location: Dearborn, MI Posts: 59 iTrader: (0)	Z4 3.0i - recommended tire size? I'm purchasing an '04 3.0i with factory 18"s that needs tires. Based on very favorable reviews of the Michelin Pilot Super Sports I'd like to pick up a set, but have a question about size. Based on OEM specs Discount Tire is quoting 225/40ZR18XL for the front and 255/35ZR18XL for the rear. Do I just go with those or do I go a bit wider? Will I run into any issues by doing so? I plan on mostly street driving, however, I'd like to do a little autocrossing and light track as well. Thoughts, suggestions and comments are greatly appreciated! Last edited by bbiess; 07-27-2012 at 04:07 PM.
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07-27-2012, 01:00 PM	#3
bbiess Private Drives: 2004 3.0i - Sterling Gray Join Date: Jun 2012 Location: Dearborn, MI Posts: 59 iTrader: (0)	Cool. Really dumb question though (from a newbie): Will they work on 107s as well? Last edited by bbiess; 07-27-2012 at 01:51 PM.

07-27-2012, 04:07 PM	#4
pyo Private First Class Drives: 2004 Z4 3.0i 6spd Join Date: Feb 2012 Location: Fairfax, VA Posts: 125 iTrader: (0)	I'd like to know as well for 107s __________________ '04 Z4 3.0i 6sp AW w/ Dream Red - Stubby Antenna, OE Clear Kit, OE Front Aero, OE E46 Aux Kit, Smoke Tinted Front Ambers, Sound Gen Mod, Matte Black Grills, RPI Red Air Scoop, Dinan CAI, Windblox Screen, gapTech RCH+, CDV Delete, Clutch Stop, RE Race Brace, USMillWorks Front Plate Tow Hook, AutoSolutions SSK, ZHP Knob,

07-28-2012, 11:53 PM	#6
pokeybritches Major Drives: G-Power Z4M, VF Z4 3.0i, ZJ Join Date: Sep 2009 Location: Gulf Coast, USA Posts: 1,371 iTrader: (10) Garage List 2003 BMW Z4 3.0i [4.33] 2006 BMW Z4M [0.00]	I would be inclined to keep the stock sizes due to speedo error, and a 265 width tires on 8.5" wheels is on the stuffed side. __________________ G-Power Z4M (April Install) and VF Engineering Z4 3.0i - too many mods to list

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07-27-2012, 12:41 PM	#2
Kurumi Token Asian. Drives: 2006 Alpine White Z4 3.0si Join Date: May 2011 Location: 20110 \| 27615 Posts: 50 iTrader: (0)	You should be able to go +1 size up (e.g. 235/40/18 and 265/35/18 respectively). I am running those on my Style 108s without any issues.

07-27-2012, 09:24 PM	#5
pmmjarrett Retired Paratrooper Drives: 2006 BMW Z4 3.0i Sport Join Date: Jul 2012 Location: North Carolina Posts: 147 iTrader: (0)	Not a dumb question unless you didn't ask. 107s and 108s are the exact same width and backspacing 18x8 ET47 front 18x8.5 ET50 rear

07-31-2012, 07:24 PM	#8
bbiess Private Drives: 2004 3.0i - Sterling Gray Join Date: Jun 2012 Location: Dearborn, MI Posts: 59 iTrader: (0)	I think I'm leaning toward stock sizes for the reasons mentioned. What are your thoughts on spacers? I've seen numerous posts about them and they interest me especially when going through the process of having new tires mounted. Is their sole purpose to simply push your wheels/tires outward for cosmetic reasons? Do we like them? Do they effect driving characteristics? What size spacers on a 3.0i with stock size 18" wheels/tires?