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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > 18x8.5 ET30 - Fit Fronts?



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      04-25-2008, 12:56 PM   #1
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18x8.5 ET30 - Fit Fronts?

Okay, help me out guys! I really want a square setup.

Will a 18x8.5 wheel with ET30 work up front? I am thinking of 245's. According to the spacing calculator, I'd get "2mm LESS clearance on the strut side, and the outside edge of the wheel will EXTEND an extra 10mm". I really don't have any concerns this will fit the back. I am more concerned about the fronts.

I do intend to get H&R coilovers at some point to lower the car, but it won't be slammed.

The wheels are Kosei K3's from Tirerack. Check out the 19" - silly low pricing. But I'm going with the 18" for lighter weight and lower cost tires.

HELP!
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      04-25-2008, 01:07 PM   #2
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Coupe or Sedan?

Less room on Coupe. Regardless I'll be running a 19X8.5 et30 up front. It says the tire will extend an extra 10mm. I was running a 19X9 ET35 up front and it extended and extra 12mm. So I don't "THINK" there would be problem, but we will see.
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      04-25-2008, 01:53 PM   #3
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Well the wheel will definitely work but the tire size is questionable. My 18x8.5 30 et with 225s on the front go right to the edge of the fender.

Check out some of my pics here:
http://www.e90post.com/forums/showpo...71&postcount=1

I think most people running a 245 in the front are using 38 ET wheels.
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      04-25-2008, 03:43 PM   #4
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Quote:
Originally Posted by E30M3Driver View Post
Well the wheel will definitely work but the tire size is questionable. My 18x8.5 30 et with 225s on the front go right to the edge of the fender.

Check out some of my pics here:
http://www.e90post.com/forums/showpo...71&postcount=1

I think most people running a 245 in the front are using 38 ET wheels.
Thanks for the info. I have a sedan. I wonder if there's any difference for the front wheel wells between the sedan and the coupe...
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      04-25-2008, 03:57 PM   #5
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I have 19x8.5 ET30 rims with 235/35/19 tires on all 4 corners, here's how they line up to the fender. I would be concerned that 245's would protrude a tiny bit at the front, especially since 18's would have a slightly thicker sidewall with which to bulge out.

Edit: I have an xi so ride height should be identical to yours right now.
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      04-25-2008, 04:29 PM   #6
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Quote:
Originally Posted by E30M3Driver View Post
Well the wheel will definitely work but the tire size is questionable. My 18x8.5 30 et with 225s on the front go right to the edge of the fender.

Check out some of my pics here:
http://www.e90post.com/forums/showpo...71&postcount=1

I think most people running a 245 in the front are using 38 ET wheels.
I'd like to see more shots of your front end setup... As I mentioned in my other thread where you broght this up I was running 9" wide 19" wheels up front with the 235/35s at a 35 offset. According to tire racks calculator by going to an 8.5" wheel with the same 235/35 tire and a 30mil offset I'll be 10mills out on the outside of the tire as apposed to the 12 mils out I was with the 9" wide wheel...

So they should fit without any problem and I certainly didn't have any troubles with my previous set of DPEs... So yeah, got some good pics of your fronts showing your clearance?
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      04-26-2008, 02:19 AM   #7
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Quote:
Originally Posted by GregL View Post
I have 19x8.5 ET30 rims with 235/35/19 tires on all 4 corners, here's how they line up to the fender. I would be concerned that 245's would protrude a tiny bit at the front, especially since 18's would have a slightly thicker sidewall with which to bulge out.

Edit: I have an xi so ride height should be identical to yours right now.
That is great information GregL!!!

Do you think the 235's you have on now would rub if you lowered the xi?
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      04-26-2008, 10:47 AM   #8
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Quote:
Originally Posted by Revlis View Post
I'd like to see more shots of your front end setup... As I mentioned in my other thread where you broght this up I was running 9" wide 19" wheels up front with the 235/35s at a 35 offset. According to tire racks calculator by going to an 8.5" wheel with the same 235/35 tire and a 30mil offset I'll be 10mills out on the outside of the tire as apposed to the 12 mils out I was with the 9" wide wheel...

So they should fit without any problem and I certainly didn't have any troubles with my previous set of DPEs... So yeah, got some good pics of your fronts showing your clearance?

Best is what I posted in the link above. Unfortunately they are my winter set and I have swapped out for my CSL reps and they are off the car or I would go snap a better pic. Back to your other thread, it sounds like you will be ok. My 18x8.5's 30 ET the wheel lip is flush to the edge of the fender. The 225s actual tuck in a bit on the 8.5" wheel so they fit fine.

Based on the pics above and compared to mine, it looks like the sedan has more fender clearance than the coupe.
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      04-26-2008, 11:02 AM   #9
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Quote:
Originally Posted by PeeGoo View Post
That is great information GregL!!!

Do you think the 235's you have on now would rub if you lowered the xi?
I imagine it would depend how low you want to go. I want to get the H&R springs at some point and based on a comparison I did between the different figures, it would still sit on average 0.1" higher than a stock 330i ZSP out of factory and that car still shows my particular wheel & tire combination as an option on Tire Rack. So up to a 1.4" drop I can't imagine any problems whatsoever. There are a few members here running a staggered setup on a lowered xi car, they might be able to help more if you intend to lower it further with a full coilover kit.
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