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      03-07-2011, 06:16 PM   #114
onebluemcm
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Drives: '07 Z4MC
Join Date: Apr 2010
Location: Richmond, VA

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Quote:
Originally Posted by BTM View Post
Ok thank you for this info. I was not recommending one attempt this themselves, rather that I had heard it mentioned a few times it is possible. And it makes sense...hell we do business with an engineering company that machines 100lb shafts from billet for us which must be in perfect balance...given that it seems like machining a wheel hub down is entirely feasible...the liability however being a major concern.
I also have no doubt that this can be done and done right - I see the main logistical issues being mounting the wheel without damaging the finish becaus the face of the rim wil have to be down most likely and then it would just have to be done by someone who absolutely knows how to reference the CNC to the rim so that the finished flange surface is as dead-on parallel to the rim as possible. It's a matter of finding the right shop. And making sure there is enough material to safely work with it.

My front RAC RG63s are pretty aggressive and I do have some room to spare on the inside. Also, the fronts have more material in the flange than the rears, so at least in my theoretical head, it might be possible. I haven't contacted RAC to find out if a few millimeters could be shaved off and maintain structural integrity though. I just may do that now that we've brought this topic up though!

Quote:
Originally Posted by r4gs View Post
^boo thanks though. thinking the addition of 10mm/12mm spacers would be perfectly fine, but don't want to run spacers in the first instance. i need to stop myself from being tempted to get wheels!
Nooo! Don't give up! It took me forever to finally bite the bullet. I guess it partly depends on what you want to spend, but if you can hold on it does sound highly likely that MORR will be making an 18" version of their VS8.2 wheel. I've been constantly reminding them of what offset range would be best for the Z4M, hopefully they will come up with something that fits well. Wheels are a great mod because it's a way to but some of your own taste into it. Suspension, electronics - that are what they are, just stuff that we toss on in different combos. Wheels are something a little more personal IMO. Keep looking!

Quote:
Originally Posted by r4gs View Post
F: 18x8.5 et35 with 245/40
R: 18x9.5 et35 with 265/40

will the rears clear the inside of the rear wheel wells? calculators are showing 11mm less wheel to strut clearance.
I have an estimated 8-9 mm clearance on the inside - estimated because even though I can see it clearly, I cannot get a measurement tool up in there to get a precise measurement. That's with a 10" et27 rear. Using the wheel calculator here http://marksink.com/tire_wheel_offset/offset.html it says you have 2 mm less clearance to the strut, and the outside of the wheel would move inward by 14 mm, a tad too much IMO but from an appearance point of view, not a functionality point of view. Would it work?...me says yes Might you do better on a wheel without spacers? Probably. Based on mine, I'd say this 9.5 et35 would look great with just a 10 mm spacer, if all calculations are correct, that would set it inward about 4 mm from where mine are - perfecto!
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Silbergrau A08 / Sepang Brown LSD6 / Carbon Leather 4MY (1 of 3, this combo)
RAC RG63 | Conti EC-DW | GC/Koni-Dinan | Rogue RSM | Arqray | Autosolutions | BMW brace | Pinnacle tint

Last edited by onebluemcm; 03-07-2011 at 06:34 PM..
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