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      11-08-2012, 11:58 AM   #1
utenigma
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255 square setup?

Anybody have experience with a 255 square setup on the F30?

I'm thinking mounted on 8.5" ET 35 - should be 7mm less on the inside and stick out 5mm more on the outside for the front tire

Welcome comments on the fit - as well as handling impact at the limit
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      11-08-2012, 12:37 PM   #2
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Quote:
Originally Posted by utenigma View Post
Anybody have experience with a 255 square setup on the F30?

I'm thinking mounted on 8.5" ET 35 - should be 7mm less on the inside and stick out 5mm more on the outside for the front tire

Welcome comments on the fit - as well as handling impact at the limit
More curious ... why would you want to do this??? To be able to rotate them I pressume? Might look a bit weird (as fronts will stick out significantly farther out than your rears). You'll have a "staggered" look, but a backwards one lol...
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      11-08-2012, 01:05 PM   #3
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Originally Posted by martinf79 View Post
More curious ... why would you want to do this??? To be able to rotate them I pressume? Might look a bit weird (as fronts will stick out significantly farther out than your rears). You'll have a "staggered" look, but a backwards one lol...
Primarily yes - to be able to rotate them... also to get more front end grip on turn-in

As to "sticking out" - an 8.5 ET35 only sticks out 5mm further than the stock front 8

In the rear an 8.5 ET35 would stick out 12mm further than the stock staggered 8.5 ET47 - so basically the inverse of what you're saying - the rears would stick out further than the fronts
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      11-08-2012, 01:10 PM   #4
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Quote:
Originally Posted by martinf79 View Post
More curious ... why would you want to do this??? To be able to rotate them I pressume? Might look a bit weird (as fronts will stick out significantly farther out than your rears). You'll have a "staggered" look, but a backwards one lol...
A square setup will help get rid of the understeer. I'm thinking of doing a 18 inch square setup myself.

Quote:
Originally Posted by utenigma View Post
Anybody have experience with a 255 square setup on the F30?

I'm thinking mounted on 8.5" ET 35 - should be 7mm less on the inside and stick out 5mm more on the outside for the front tire

Welcome comments on the fit - as well as handling impact at the limit
You should be fine with that. You could even do 9's all around at that offset if you want. The fronts can actually swallow a good amount of wheel. I know this because my front 8.5 offset is in the 20's.

For the rear if you are going to do a 8.5 et 35 maybe throw a spacer in there to balance it out. You can easily put a 12mm spacer in the rear with a touch of camber. Again I know this because of my current setup.

Before you ask I know the offsets on my setup but I can't post them yet do to a sponsorship agreement. They have to post first.

Good luck. Might I suggest some volks. A square TE37 setup would be !
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      11-08-2012, 09:36 PM   #5
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Quote:
Originally Posted by utenigma View Post
Anybody have experience with a 255 square setup on the F30?

I'm thinking mounted on 8.5" ET 35 - should be 7mm less on the inside and stick out 5mm more on the outside for the front tire

Welcome comments on the fit - as well as handling impact at the limit
++square setup, this car with any obtainable alignment on factory parts just doesn't steer. There is no way could I run staggered on this car and be happy.

225 to 255 isn't really enough tire to make a difference to me although I would love to compare the exact same tire back to back with only the size being different. I've done it before and wider isn't always beneficial to your lap time although it is usually beneficial to overall g's.
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      11-08-2012, 10:33 PM   #6
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Quote:
Originally Posted by brian99997
225 to 255 isn't really enough tire to make a difference to me although I would love to compare the exact same tire back to back with only the size being different. I've done it before and wider isn't always beneficial to your lap time although it is usually beneficial to overall g's.
225 just seams so skinny to me

If I could sneak a 9" rim on the front I could push up to 275 on all corners - I just don't want to make it dynamically worse chasing width
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      11-08-2012, 11:32 PM   #7
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I'm confused. Stock offset is 34et front and back.
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      11-09-2012, 01:13 AM   #8
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Quote:
Originally Posted by utenigma View Post
225 just seams so skinny to me

If I could sneak a 9" rim on the front I could push up to 275 on all corners - I just don't want to make it dynamically worse chasing width
I've heard of E46's being able to go 10.5" in the front and when I did the spring install the front of this car feels A LOT like the e46 so I don't think your 9" idea is crazy, but I wouldn't go past 265 without going to 9.5"

Turner raced their M3 GS car with 275's all around this last season but I would imagine that car has some work to keep the geometry where they want it. The rolling resistance while greatly increased would also be somewhat negated by the massive negative camber.

Prodrive made the P2 with only 235/235's and it was one of the fastest cars on top gear. Ferrari built the 458 with only 235/295 while they could have gone larger. I believe the GT car runs with something in the 275/335 area.
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      11-09-2012, 01:20 PM   #9
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Originally Posted by buildbright View Post
I'm confused. Stock offset is 34et front and back.
Not in the staggered setups - staggered, the rear's carry ET47

see here
http://www.f30post.com/forums/showthread.php?t=685033
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      11-09-2012, 01:50 PM   #10
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Can you do a 40mm et on 10" out back?

I personally think 8.5 up front and 9.5 out back is more than enough...we're not laying down THAT much power. Yet.
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      11-09-2012, 02:08 PM   #11
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I'm putting together a set of track wheels with this configuration

18x8.5 ET37 running 255/40

should have them mounted up in a week or so. I'll check back with my results and some pics
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Last edited by scott@bmwhn; 11-09-2012 at 02:30 PM.
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      11-09-2012, 05:03 PM   #12
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Which willbe best for a set of 19x9.0 ? 245/40 all around ? Imafraid of rubbing in the front.

Im on x-drive
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      11-09-2012, 05:22 PM   #13
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245/40 should work fine with a 19x9. I'm running 245/35 on my 19x8.5 ET36 and I kinda wish i had gone 245/40
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      11-11-2012, 03:24 AM   #14
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Quote:
Originally Posted by utenigma View Post
Not in the staggered setups - staggered, the rear's carry ET47

see here
http://www.f30post.com/forums/showthread.php?t=685033
Read post #4 and 5. They are talking about square saying with a et35 you need a spacer that is false.
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      12-02-2012, 11:08 PM   #15
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Quote:
Originally Posted by scott@bmwhn
I'm putting together a set of track wheels with this configuration

18x8.5 ET37 running 255/40

should have them mounted up in a week or so. I'll check back with my results and some pics
Scott any update? This work for you? Pics?

What'd you do with the alignment?
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      12-05-2012, 03:08 AM   #16
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Keep it square. +12563.

Im rocking the square 225s! Lol
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      12-05-2012, 10:07 PM   #17
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I've got a 335i Msport with staggered OEM 18's.

Would going to 245/40/18 on the stock front wheel work?
Is the front wheel not wide enough for a 245 and cause the tire to "pinch"?

According to TireRack, the Conti tire specs I'm looking at show that a 245/40 would fit an 8" to 9.5" wheel width. The 335i front OEM wheel is 8" wide.

Info and/or experience would be helpful and appreciated. Thanks.
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      12-06-2012, 02:48 PM   #18
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Originally Posted by RPM90 View Post
I've got a 335i Msport with staggered OEM 18's.

Would going to 245/40/18 on the stock front wheel work?
Is the front wheel not wide enough for a 245 and cause the tire to "pinch"?

According to TireRack, the Conti tire specs I'm looking at show that a 245/40 would fit an 8" to 9.5" wheel width. The 335i front OEM wheel is 8" wide.

Info and/or experience would be helpful and appreciated. Thanks.
You could put a 245 on the stock 8" rim, but that's right at the limit - it might look a little rounded off, but not a lot more than the stock 255 on 8.5" rims in the back on a stock staggered setup (2.7 mm more "pinched")

I've got the stock 18" sport square rims (style 397 8" front and back) - maybe I'll just try shoeing them with 245/40 non-run-flat rubber and see how that goes

Might buy you some rim protection from scuffing as well

Last edited by utenigma; 12-06-2012 at 02:58 PM.
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      12-06-2012, 03:19 PM   #19
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Quote:
Originally Posted by utenigma View Post
Scott any update? This work for you? Pics?

What'd you do with the alignment?
not yet, just waiting for them to be balanced. Supposed to be done sometime this week but the tech is dragging his feet
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      12-07-2012, 03:25 PM   #20
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Quote:
Originally Posted by utenigma View Post
You could put a 245 on the stock 8" rim, but that's right at the limit - it might look a little rounded off, but not a lot more than the stock 255 on 8.5" rims in the back on a stock staggered setup (2.7 mm more "pinched")

I've got the stock 18" sport square rims (style 397 8" front and back) - maybe I'll just try shoeing them with 245/40 non-run-flat rubber and see how that goes

Might buy you some rim protection from scuffing as well
The reason I'm considering this is because of the tires I want, the fronts stock size is out of stock until January.
There are 235/45/18, which is 26.3", OEM is 26".
The 245/40, I think, is 25.7".
I think I'll try the 235/45 that will fit just fine on the stock wheel.

BTW, I thought the rears on a stock staggered setup were 9" no?
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      12-07-2012, 04:22 PM   #21
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Originally Posted by RPM90 View Post
...BTW, I thought the rears on a stock staggered setup were 9" no?
Nope, 8" in the front, 8.5" in the back on all stock staggered - even the M Performance Parts 20" 405's

Quote:
Originally Posted by E90Fleet View Post
Standard factory wheels offsets:
  • 18" Double Spoke Style 400M (M Sport wheels) - 18x8" ET34 225/45-18 front / 18x8.5" ET47 255/40-18 rear
  • 18" Double Spoke Style 397 (Sport Line wheels) - 18x8" ET34
  • 19" Double Spoke Style 401 - 19x8" ET36 225/40/R19 front / 19x8.5" ET47 255/35/R19 rear
  • 20" Cross Spoke Style 404 - 20x8" ET36 225/35/R20 front / 20x8.5" ET47 255/30/R20 rear
  • 20" M Double Spoke Style 405 - 20x8" ET36 225/35/R20 front / 20x8.5" ET47 255/30/R20 rear
from http://www.f30post.com/forums/newrep...ply&p=11871002
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      12-07-2012, 08:17 PM   #22
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Quote:
Originally Posted by utenigma View Post
Nope, 8" in the front, 8.5" in the back on all stock staggered - even the M Performance Parts 20" 405's



from http://www.f30post.com/forums/newrep...ply&p=11871002
Thanks for the info. It's all coming back to me now.
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