Z4 (non-M) Definitive Wheel Spec Thread

[Ferus]

Great information. Has been helpful.
Does any one know the offset on factory "M" wheels -COMPARED TO- offset on factory "non-M" wheels?

[v3.0si]

Originally Posted by Ferus

Great information. Has been helpful.
Does any one know the offset on factory "M" wheels -COMPARED TO- offset on factory "non-M" wheels?

it depends on which "non-M" wheel you have... different styles have different specs. here is comparo of style 203 to style 224m...

style 203...
front = 18" x 8.0" et47
rear = 18" x 8.5" et50

style 224m...
front = 18" x 8.0" et42
rear = 18" x 9.0" et30

if you were to put 224m's on a non-///m z4 (coming from 203's)...
front = 5mm MORE inner clearance (strut), 5mm LESS outer clearance (fender)
rear = 14mm MORE inner clearance, 26mm LESS outer clearance (sticks out from fender on stock suspension and no camber adjustment)

great website for wheel/tire size comparison...

http://1010tires.com/WheelOffsetCalculator.asp
http://www.1010tires.com/TireSizeCalculator.asp

[Avicenna]

StigJ, what are the wheels on the bottom right pic of your sig?

[v3.0si]

^^^

http://www.zpost.com/forums/showthread.php?t=506796

[StigJ]

Originally Posted by tarheel91

Edit: By the way, if anyone could identify the wheels on my car, I'd greatly appreciate it. I've looked at pretty much every BMW composite wheel and it's not there. I can't find an aftermarket place that makes it either. Finding the maker would help getting specs a lot.

Those are replicas of Hartge Classic.
You can see that they are replicas if you study them and see that yours do not have the curve between the bolts.
The Hartges are 2 piece wheels and yours are one piece. The bolts are only for the looks.

Here are the real Hartge Classics

[aftercorbu]

18" VMR VB3 Gunmetal 8.5 ET40 front and 9.5 ET45 rear with 225/40 and 255/35 V12's.


BMW_four_sm by aftercorbu, on Flickr



BMW_one_sm by aftercorbu, on Flickr



BMW_three_sm by aftercorbu, on Flickr

[dharper]

Wheels: AvantGarde M33518x8 ET35 front, 18x9 ET 38 rear
Tires: Continental Extreme Contact DWS 225/45/18front, 255/35/18 rear

2003 Z4 2.5i Sport pkg stock setup

[Aries326]

Thanks for sharing your wheel sizes. I've been researching tire and wheel sizes and I still can't make up my mind whether or not I get 18" or 19" rims. Most of you guys here seem to have 18" rims. Did you choose to get 18" for comfort? With 19", I'll need to get low profile tires which will roughen up the ride.

Right now I'm leaning towards getting a set of VMR 701s 18" with Hankook V12s 235s in front and 265s in the rear. This should be ok without spacers, I imagine.

[lpapostolis]

Originally Posted by G1HQ

Ive been holding off on posting pics but here are some from last summer ...

yes they are from an iphone..lol
apex arc-8 on oem (zhp)sport suspension.

front: 18x8.5 et 40
rear: 18x9.5 et 35
tire sizes are standard set up
front: 225/40/18-hankook v12
rear: 255/35/18-dunlop direzza star specs
both to be dunlop very soon..


http://www.zpost.com/forums/attachme...1&d=1303589474

are the rears inside or outside of the fender? do you have any rubbing issues?

[bassrebel]

I'm planning on getting 18x8.5 in the front and 18x10 in the rear...

tires up front are 225/40/18 and rears are 265/35/18

what would the recommended offset be for a setup like this?

I have stock suspension for now

[v3.2mc]

Originally Posted by bassrebel

I'm planning on getting 18x8.5 in the front and 18x10 in the rear...

tires up front are 225/40/18 and rears are 265/35/18

what would the recommended offset be for a setup like this?

I have stock suspension for now

for 8.5" up front you'll want between et40 and et35

the only offset that will work for 10" in back is et40, and you'll need a serious amount of camber. you'll also need a fat stack of cash for all of the tires you're going to go through because of wacky alignment.

[CJW2OO4]

Originally Posted by Aries326

Thanks for sharing your wheel sizes. I've been researching tire and wheel sizes and I still can't make up my mind whether or not I get 18" or 19" rims. Most of you guys here seem to have 18" rims. Did you choose to get 18" for comfort? With 19", I'll need to get low profile tires which will roughen up the ride.

Right now I'm leaning towards getting a set of VMR 701s 18" with Hankook V12s 235s in front and 265s in the rear. This should be ok without spacers, I imagine.

I personally chose 19s for these reasons

1. I dont beat on my car or track my car. If i did i would opt for smaller lighter wheels.

2. 19"s look and I personally think 18s look kinda small on the Z

3. Also from my experience used 18" aftermarket wheels like Iforged, HREs, and DPEs are much harder to find than their 19" counterparts.

[Aries326]

Originally Posted by CJW2OO4

I personally chose 19s for these reasons

1. I dont beat on my car or trace my car. If i did i would opt for smaller lighter wheels.

2. 19"s look and I personally think 19s look kinda small on the Z

3. Also from my experience used 18" aftermarket wheels like Iforged, HREs, and DPEs are much harder to find than their 19" counterparts.

I've totally changed my game plan. I will be keeping my 108s for now, get new tires for them when the RFTs are no good and I'll use these for auto crossing. I'll get a pair of 19" just for looks. What were the offsets on your 19" rims? Did you use pacers? What size tires did you go with? Thanks!

[CJW2OO4]

Originally Posted by Aries326

What were the offsets on your 19" rims?

I am not sure of the offset of my wheels. Sorry. The wheels were previously on a non m e46.

Originally Posted by Aries326

Did you use spacers?

no spacers.

Originally Posted by Aries326

What size tires did you go with? Thanks!

IIRC 245/35/19 Front and 275/30/19 rear. The wheels were 19x8.5 Front and 19x10 Rear.

here is an old cell pic

[Resilient1]

Have anyone tried fitting 20" staggered with Coils on their E85 non-M?

[DSC_OFF]

Originally Posted by Resilient1

Have anyone tried fitting 20" staggered with Coils on their E85 non-M?

Doubt it, would be too heavy and would make your calipers look non-existent imho...

[CJW2OO4]

Originally Posted by Dubbedown

Doubt it, would be too heavy and would make your calipers look non-existent imho...

I agree with this.

20" wheels are heavy and tires are expensive. However If you have a bbk and a really aggresive look then you might be able to pull it off. IIRC there is a z4 from europe that is on black 20"s and looks good because of the acs body kit. On a stock car with just coils it will be too much. thats just IMHO

[renesis]

anyone has specs for stock 108's?

(weight, width, offset)

[v3.2mc]

Originally Posted by renesis

anyone has specs for stock 108's?

(weight, width, offset)

great data set for BMW wheels...

http://felgenkatalog.auto-treff.com/

it doesn't appear they have the weights for that style though.

[renesis]

nice website.

So there goes:

8x18 225/40R18 ET 47
8,5x18 255/35R18 ET 50

[Denton]

Ordered 18x8 ET20/18x9 ET22 Style 5s off an E38 today, brand new. We'll see how they fit up and what tires I need to run.

[v3.2mc]

Originally Posted by Denton

Ordered 18x8 ET20/18x9 ET22 Style 5s off an E38 today, brand new. We'll see how they fit up and what tires I need to run.

you will struggle to get those to fit... the offsets are REALLY aggressive.

you'll also need centering rings.