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      05-23-2012, 03:50 PM   #265
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Quote:
Originally Posted by v3.2mc View Post
this is excellent information! what a great starting point... i've got some ideas on how to make this data user friendly for the odd onlooker. point taken about the round numbers given; i'll do proper measurements this weekend.

safe journey!
Have you had a chance to measure yet? I think we need a stock setup to measure properly I think.
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      05-23-2012, 10:03 PM   #266
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Quote:
Originally Posted by beta View Post
Have you had a chance to measure yet? I think we need a stock setup to measure properly I think.
yes! crap! sorry!

now, keep in mind all-a-yoos-guys that these are not EXACT measurements. i do not have the proper tools for that. that being said there is some variability and therefore leeway i'm awarding myself. in general, i believe these measurements are reasonably accurate to +/- 2mm. READ... that's a possible 4mm margin of error.

ok... stock suspension, stock alignment, stock wheels, stock tires...

Ty = 522mm
Tz = 769mm
By = 696mm
Bz = 186mm
Cy = 743mm

courtesy of aerobod, S=(Cy-By)-{((By-Ty)*Bz)/(Tz-Bz)}

S(stock) = (743-696)-{((696-522)*186)/(769-186)} = -9mm [sig figs]

-9mm obviously translates to a negative scrub radius, which is quite well suited to mcstrut suspension setups. this number is no surprise then, especially on a BMW.

now... on to my current setup... stock suspension, stock alignment, 19.0" x 8.5" et35, 245/35r19

Ty = 522mm
Tz = 766mm
By = 696mm
Bz = 183mm
Cy = 750mm

S(v3.2mc) = (750-696)-{((696-522)*183)/(766-183)} = -1mm [sig figs]

-1mm is way better than i thought it would be! i half expected to find some seriously wonky and positive SR and totally start second guessing myself on whether or not i should consider getting some track wheels, or just run what i brung. turns out the only real PITA is going to be the weight of the wheels.

it is also worth noting that adding the shim kit makes sense for me at this point. it may cut down on tire life, but it will also fool the car into thinking i have a close-to-stock SR, and add neg camber at the same time.

and please... somebody... by all means check my math. i'm human and make mistakes.

also, if somebody wants me to start a new thread with this info, just let me know.
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      05-26-2012, 09:32 PM   #267
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Will these work on stock height without any rubbing?

Wheel size: 19x8.5 and 19x9.5
Offset: ET20 front and 22 rear
Tire Size: 245/35 and 265/35

Thanks in advance!
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      05-29-2012, 11:06 AM   #268
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I'm about to order the following setup for my 07 Z4 M Coupe and would appreciate any thoughts you may have on possible fitment/rubbing issues:
Front: 19x8.5 et 35 with Michelin Pilot SS 235/35
Rear; 19x10 et 26 with Michelin Pilot SS 275/30
Currently the car has stock suspension, but I would like to add some lowering in the future.
Thanks in advance for your replies and I apologize if this spec has already been discussed.
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      05-29-2012, 02:41 PM   #269
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Quote:
Originally Posted by IWantAnE92 View Post
Will these work on stock height without any rubbing?

Wheel size: 19x8.5 and 19x9.5
Offset: ET20 front and 22 rear
Tire Size: 245/35 and 265/35

Thanks in advance!
nope.

the front offsets are too aggressive. you'll need camber plates to get them to turn free, and maybe shorter sidewalls.

the rears are fine.
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      05-29-2012, 02:43 PM   #270
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Quote:
Originally Posted by jrainlay View Post
I'm about to order the following setup for my 07 Z4 M Coupe and would appreciate any thoughts you may have on possible fitment/rubbing issues:
Front: 19x8.5 et 35 with Michelin Pilot SS 235/35
Rear; 19x10 et 26 with Michelin Pilot SS 275/30
Currently the car has stock suspension, but I would like to add some lowering in the future.
Thanks in advance for your replies and I apologize if this spec has already been discussed.
that's a great setup (very similar to my own specs), but you may need an alignment to make the rear feel less squirelly.
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      05-29-2012, 03:06 PM   #271
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Thanks for the reply v3.2mc. Are you lowered? Any rubbing?
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      05-29-2012, 03:38 PM   #272
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Quote:
Originally Posted by jrainlay View Post
Are you lowered? Any rubbing?
frt = 245/35r19 on 8.5" et35
rear = 275/30r19 on 9.5" et20

stock suspension.

absolutely zero rubbing.
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      06-04-2012, 06:15 AM   #273
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Front wheels are 18x9 + 42 with a 245/40/18 tire.

Car has to be slammed on KW V3 coilovers.

Whats is the smallest spacers that will allow me to clear the coilover perch without poking too much in front.

Basically, I wanna run low, So I need the perfect compromise between clearing the perch and the fender...

No camber plates involved.
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      07-03-2012, 11:47 AM   #274
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I know some of this depends on the specific tire, but say for questionn Hankook V12 in 275/30/19 is there going to be any problem rubbing on the rears with a 19x9.5 et 20 wheel? All on stock suspension for now
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Last edited by TexasZed4MC; 07-03-2012 at 11:48 AM.. Reason: additional info
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      07-03-2012, 11:50 AM   #275
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also depends on how much - camber
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      07-03-2012, 11:59 AM   #276
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Quote:
Originally Posted by TexasZed4MC View Post
I know some of this depends on the specific tire, but say for questionn Hankook V12 in 275/30/19 is there going to be any problem rubbing on the rears with a 19x9.5 et 20 wheel? All on stock suspension for now
I had this exact setup (Hankooks, sizes) on stock height for a long time with no issues. Now dropped .8" with -1.5mm camber and still no issues.
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      07-13-2012, 12:56 PM   #277
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A friend of mine has some VB3s he is willing to sell me for a fair price. 18" et 22 squared. Will this fit my Z4M? I am running eibach springs. I will have the opportunity to purchase whatever tire would be needed. Thanks for any advice.
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      07-22-2012, 08:57 AM   #278
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I love the look of wheels with lots of lip on them. I have just bought my MZ4 coupe not long ago but I want to exchange the wheels. I want to go with some serious wide wheels. I would love to put some 8.5-9.5" on the front and maybe some 9.5-10.5" on the rear. I would like to keep the original suspension and 18" wheels. (More rubber the nicer the ride!) Please give me a guideline as to what offset I need to keep the rubber under the car? I really don't like the tires sticking out from the car. Any suggestions? I want no rub.

Thanks
Paul
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      07-22-2012, 12:38 PM   #279
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Quote:
Originally Posted by nwflbimmer View Post
I love the look of wheels with lots of lip on them. I have just bought my MZ4 coupe not long ago but I want to exchange the wheels. I want to go with some serious wide wheels. I would love to put some 8.5-9.5" on the front and maybe some 9.5-10.5" on the rear. I would like to keep the original suspension and 18" wheels. (More rubber the nicer the ride!) Please give me a guideline as to what offset I need to keep the rubber under the car? I really don't like the tires sticking out from the car. Any suggestions? I want no rub.

Thanks
Paul
8.5 x 18 ET35 and 9.5 x 18 ET22 is a perfect offset IMO for coming right to the edge without sticking out AND having no rubbing issues on either side of the wheel. I just put that size on my M Roadster and I'm very happy with the look and ride. Finding an old school wheel with a deep lip in those sizes might pose a little challenge, but I would guess something is out there

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      07-22-2012, 03:04 PM   #280
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Can I see a picture of your car with the new wheels?
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      07-22-2012, 03:35 PM   #281
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8.5 x 18 ET32 and 9.5 x 18 ET25 on mine







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      07-22-2012, 04:05 PM   #282
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Quote:
Originally Posted by nwflbimmer View Post
Can I see a picture of your car with the new wheels?
Not sure if you were asking me or another poster, but here they are:
Attached Images
  
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      07-22-2012, 05:15 PM   #283
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Quote:
Originally Posted by antennahead View Post
Not sure if you were asking me or another poster, but here they are:
Your offsets wont work with what I want. I looking for 2-3" lip on my rears.
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      07-24-2012, 10:08 AM   #284
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Quote:
Originally Posted by nwflbimmer View Post
Your offsets wont work with what I want. I looking for 2-3" lip on my rears.
The OZ Racing Tuner System wheel is about the only wheel that will fit our cars and give a lip of any depth: http://www.tirerack.com/wheels/resul...rSpecial=false
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      07-24-2012, 11:41 AM   #285
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i dont think so. many rims with lip fit our cars. especially custom fit ones like dpe, hre, adv1, forged1.....not to mention work and bbs.
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      07-24-2012, 11:58 AM   #286
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Quote:
Originally Posted by nwflbimmer View Post
I love the look of wheels with lots of lip on them.
The craziest lip I've seen yet is Thatcher's old ride with Work Meisters. If that doesn't work for you, you're too crazy for me
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