maximum spacer size for Z4M with stock OEM wheels

Fen335i · 03-08-2013, 09:04 PM

Hi Guys - I did a search and didn't come up with much. So, what is the maximum size spacer one can put on a 07' Z4M with stock suspension and oem wheels? If anyone has pictures, I'd love to see them. Thanks.

I'm running 245/40/18 in front and 265/40/18 in the rear on OEM Z4M wheels

Caddyshk · 03-09-2013, 07:16 AM

I had slight rub on the rears with 12.5mm with 265/40/18 lowered ~ 1". Fronts should work fine

Mirko · 03-09-2013, 08:03 AM

I think you would get rub slight rub with 245 in the front and a 12.5mm spacer. I am lowered slightly (.5-1") and running stock 225 up front and over big bumps or tight corners I can hear a slight rub. I am not running spacers in the rear so cant say.

Ga41 is running 12.5mm and has rub in the front with Yokohama AD08s in stock sizes. No rubbing in the rear with a 12.5 spacer and stock size. He emailed me when I was asking about his BBK. Hope its okay I am quoting him.

Fen335i · 03-09-2013, 11:02 AM

Thanks Guys...so maybe I go with a 10mm in front and a 12.5 in the rear since I'm on stock suspension, but slightly larger than OEM tire sizes? I don't want to rub at all.

Anyone have pics of how this looks on OEM wheels?

Caddyshk · 03-09-2013, 12:43 PM

Quote:

Originally Posted by Fen335i

Thanks Guys...so maybe I go with a 10mm in front and a 12.5 in the rear since I'm on stock suspension, but slightly larger than OEM tire sizes? I don't want to rub at all.

Anyone have pics of how this looks on OEM wheels?

I suspect you're fine with the 12.5mm on the rear on stock suspension. I would go with 5mm in the front however given the 245's. I don't believe 10mm spacers are advised for our HUBS - at least from TMS

Quote:

A note about 10mm spacers: Any 10mm spacer is considered a custom fitment. The stock hubcentric lip on BMWs can stick out by as much as 11mm. This leaves a gap between the spacer and the hub which seriously compromises safety.

I used 5mm with no issues.

RobMCoupe · 03-09-2013, 09:15 PM

I have 5mm spacer on front. There are some vibration above 70mph. I converted to studs.

3002 tii · 03-09-2013, 10:22 PM

Quote:

Originally Posted by RobMCoupe

I have 5mm spacer on front. There are some vibration above 70mph. I converted to studs.

Studs really isn't a good long-term answer [to vibration]. If you have vibration due to lack of hub lip, you should look into hub extenders. Turner and VAC both sell some.

Or the vibration could be a variety of other reasons, unbalanced wheel, lack of hubcentric adapters (if using non-oem wheel), if the hub is chamfered or not, etc.

Fen335i · 03-10-2013, 11:15 AM

Quote:

Originally Posted by Caddyshk

I suspect you're fine with the 12.5mm on the rear on stock suspension. I would go with 5mm in the front however given the 245's. I don't believe 10mm spacers are advised for our HUBS - at least from TMS

I used 5mm with no issues.

Thank you!

ga41 · 03-10-2013, 01:28 PM

Quote:

Originally Posted by Mirko

Ga41 is running 12.5mm and has rub in the front with Yokohama AD08s in stock sizes. No rubbing in the rear with a 12.5 spacer and stock size. He emailed me when I was asking about his BBK. Hope its okay I am quoting him.

That's correct. Although the rub i had was with hard driving, during daily driving it seemed to be OK.

Now i've got 235/40/18's front (before 225/45/18) still Yokohama AD08's, but since i've flattened those small plastic protrusions in the wheel wells it doesn't seem to rub even after a track day. Rears are same size as before, stock 255/40/18.

The most recent pictures i have are these but they're not the best to judge how much further out the wheels are now.

mgwatson48 · 03-10-2013, 06:04 PM

Here are some pics from my setup. I am running pilot super sports, 265/40/18 rear, 235/45/18 front. I am running a 12mm spacer in the rear and 7mm (all i had laying around) in the front. The rear is PERFECT with no rubbing on stock suspension, and the front are still sunk in pretty far, but whatever. Hope this helps.

Front:

Rear:

Gt4 · 03-10-2013, 06:57 PM

Quote:

Originally Posted by DSC_OFF

Studs really isn't a good long-term answer [to vibration]. If you have vibration due to lack of hub lip, you should look into hub extenders. Turner and VAC both sell some.

Or the vibration could be a variety of other reasons, unbalanced wheel, lack of hubcentric adapters (if using non-oem wheel), if the hub is chamfered or not, etc.

What do you mean by is the hub chamfered or not? Is there 2 differents models or a modification you have done?

I am asking the question because I tried spacers last year (10mm and 12mm) and there was vibration. When I removed the wheels, I noticed that the spacers were not seating properly on the hub, like if the hub would need to be chamfered...

Fen335i · 03-10-2013, 07:50 PM

Quote:

Originally Posted by ga41

That's correct. Although the rub i had was with hard driving, during daily driving it seemed to be OK.

Now i've got 235/40/18's front (before 225/45/18) still Yokohama AD08's, but since i've flattened those small plastic protrusions in the wheel wells it doesn't seem to rub even after a track day. Rears are same size as before, stock 255/40/18.

The most recent pictures i have are these but they're not the best to judge how much further out the wheels are now.

Thanks, the 12.5 in the rear looks really good!

Fen335i · 03-10-2013, 07:51 PM

Quote:

Originally Posted by mgwatson48

Here are some pics from my setup. I am running pilot super sports, 265/40/18 rear, 235/45/18 front. I am running a 12mm spacer in the rear and 7mm (all i had laying around) in the front. The rear is PERFECT with no rubbing on stock suspension, and the front are still sunk in pretty far, but whatever. Hope this helps.

Front:

Rear:

Thanks, sounds like 12 or 12.5 will work well in the rear w/stock suspension on 265's. Looks good.

Caddyshk · 03-10-2013, 08:17 PM

The TMS 12.5mm seat properly and provide the lip...

3002 tii · 03-10-2013, 09:55 PM

Quote:

Originally Posted by Gtfour

What do you mean by is the hub chamfered or not? Is there 2 differents models or a modification you have done?

I am asking the question because I tried spacers last year (10mm and 12mm) and there was vibration. When I removed the wheels, I noticed that the spacers were not seating properly on the hub, like if the hub would need to be chamfered...

What kind of wheels do you have?

I started a thread a while back on spacer confusion, it may help. See my first and last post:

http://www.zpost.com/forums/showthread.php?t=681842

RobMCoupe · 03-13-2013, 06:20 PM

Quote:

Originally Posted by DSC_OFF

Studs really isn't a good long-term answer [to vibration]. If you have vibration due to lack of hub lip, you should look into hub extenders. Turner and VAC both sell some.

Or the vibration could be a variety of other reasons, unbalanced wheel, lack of hubcentric adapters (if using non-oem wheel), if the hub is chamfered or not, etc.

I have to check my wheels when I do my brakes. IIRC, OEM CSL have bevel type wheels.

BIMMERGUY91 · 03-13-2013, 09:06 PM

Think I could get away with a 7mm front 12mm rear lowered on H&R coilovers about 2.2"

03-08-2013, 09:04 PM	#1
Fen335i Captain 107 Rep 805 Posts Drives: e92 M3 / X5d / Z4 M Roadster Join Date: Jun 2008 Location: Pacific Northwest iTrader: (0)	maximum spacer size for Z4M with stock OEM wheels Hi Guys - I did a search and didn't come up with much. So, what is the maximum size spacer one can put on a 07' Z4M with stock suspension and oem wheels? If anyone has pictures, I'd love to see them. Thanks. I'm running 245/40/18 in front and 265/40/18 in the rear on OEM Z4M wheels
	Appreciate 0 Tweet Quote

03-09-2013, 07:16 AM	#2
Caddyshk M = Midlife Crisis 65 Rep 2,006 Posts Drives: 2006 Z4MC Interlagos Join Date: May 2007 Location: Fort Erie, Ontario, Canada iTrader: (0)	I had slight rub on the rears with 12.5mm with 265/40/18 lowered ~ 1". Fronts should work fine __________________ 2006 Z4MC - #LL93158 SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
	Appreciate 0 Quote

03-09-2013, 08:03 AM	#3
Mirko Major 182 Rep 1,031 Posts Drives: E86 Z4M, E90 328i, E84 X1 Join Date: Apr 2011 Location: Toronto iTrader: (2)	I think you would get rub slight rub with 245 in the front and a 12.5mm spacer. I am lowered slightly (.5-1") and running stock 225 up front and over big bumps or tight corners I can hear a slight rub. I am not running spacers in the rear so cant say. Ga41 is running 12.5mm and has rub in the front with Yokohama AD08s in stock sizes. No rubbing in the rear with a 12.5 spacer and stock size. He emailed me when I was asking about his BBK. Hope its okay I am quoting him.
	Appreciate 0 Quote

03-09-2013, 11:02 AM	#4
Fen335i Captain 107 Rep 805 Posts Drives: e92 M3 / X5d / Z4 M Roadster Join Date: Jun 2008 Location: Pacific Northwest iTrader: (0)	Thanks Guys...so maybe I go with a 10mm in front and a 12.5 in the rear since I'm on stock suspension, but slightly larger than OEM tire sizes? I don't want to rub at all. Anyone have pics of how this looks on OEM wheels?
	Appreciate 0 Quote

03-09-2013, 09:15 PM	#6
RobMCoupe Captain 60 Rep 932 Posts Drives: 2007 Z4 M Coupe Join Date: Feb 2010 Location: Bay Area iTrader: (6)	I have 5mm spacer on front. There are some vibration above 70mph. I converted to studs.
	Appreciate 0 Quote

03-10-2013, 06:04 PM	#10
mgwatson48 Lieutenant 21 Rep 507 Posts Drives: 2008 E86 M Join Date: May 2011 Location: Canada iTrader: (2)	Here are some pics from my setup. I am running pilot super sports, 265/40/18 rear, 235/45/18 front. I am running a 12mm spacer in the rear and 7mm (all i had laying around) in the front. The rear is PERFECT with no rubbing on stock suspension, and the front are still sunk in pretty far, but whatever. Hope this helps. Front: Rear: __________________ SOLD: 2008 M Coupe
	Appreciate 0 Quote

03-10-2013, 08:17 PM	#14
Caddyshk M = Midlife Crisis 65 Rep 2,006 Posts Drives: 2006 Z4MC Interlagos Join Date: May 2007 Location: Fort Erie, Ontario, Canada iTrader: (0)	The TMS 12.5mm seat properly and provide the lip... __________________ 2006 Z4MC - #LL93158 SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
	Appreciate 0 Quote

03-13-2013, 09:06 PM	#17
BIMMERGUY91 Captain 113 Rep 855 Posts Drives: 2014 335I M Sport Join Date: Apr 2010 Location: Huntsville, AL iTrader: (2)	Think I could get away with a 7mm front 12mm rear lowered on H&R coilovers about 2.2" __________________ 2014 335i M Sport 2010 328i M Sport 2007 Z4MC #1019/1815 (Sold) 1997 M3 (Sold) 1991 325i
	Appreciate 0 Quote