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      08-27-2017, 06:31 PM   #837
NDion80
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Quote:
Originally Posted by swagon View Post
Why 215's only?
I stayed with 215 at the front because I was afraid that 255s in the rear would rub too much. And the difference in diameter between 245/35/18 and 225/40/18 was too much for my liking.

Next set of rubber i will bump up the width front and back. Although i'm thinking of adding a 3mm spacer at the front right now.
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      08-28-2017, 01:40 AM   #838
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Quote:
Originally Posted by NDion80 View Post
I stayed with 215 at the front because I was afraid that 255s in the rear would rub too much. And the difference in diameter between 245/35/18 and 225/40/18 was too much for my liking.

Next set of rubber i will bump up the width front and back. Although i'm thinking of adding a 3mm spacer at the front right now.
The M240i has 225/40 R18 and 245/35 R18 from the factory, though.
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      08-28-2017, 10:34 AM   #839
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Originally Posted by swagon View Post
The M240i has 225/40 R18 and 245/35 R18 from the factory, though.
Duly noted. Thanks
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      09-25-2017, 09:16 AM   #840
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Hi,

Looking to run a 17x9 255/40 setup on a race car. When you say you have a ton of strut clearance, do you mean up front? Could you get by with less of a spacer?

Rob
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Originally Posted by drunkenup View Post
17x9 square ET42 (10mm spacer in front)
255/40 17 Dunlop Z2SS
TC Kline single adjustable, 30 threads from bottom, Turner Motorsport camber plates maxed out, rolled and pulled fenders
1 finger fender gap front, 2 finger gap rear
front
camber -2.5 deg
toe 0

rear
camber -2.0 deg
toe 0.2 deg

Basically at fender lips all around, this is an aggressive fitment only possible with fender modifications. Looking from below I have a TON of strut clearance though. Might lower the car slightly
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      09-25-2017, 03:36 PM   #841
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Quote:
Originally Posted by rob_h View Post
Hi,

Looking to run a 17x9 255/40 setup on a race car. When you say you have a ton of strut clearance, do you mean up front? Could you get by with less of a spacer?

Rob
In front, yes. I think the TCK's I run are on the thinner side of strut tubes (unlike KWs or Ohlins). I might try a 5mm spacer instead to alleviate fender rub. I will have to double check, but you can definitely go higher than ET32.
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      10-06-2017, 01:29 PM   #842
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Hey Everyone,

What is your take on a square setup 18x8 ET 35 for a daily? From the research I have done it will fit on stock suspension and will allow for rotating tires due to the square setup. Do you think the loss of width in the front and rear is worth having the ability to rotate? Will this setup need spacers to sit flush with the fender?
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      10-06-2017, 03:03 PM   #843
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Quote:
Originally Posted by Mr. Pharaoh View Post
Hey Everyone,

What is your take on a square setup 18x8 ET 35 for a daily? From the research I have done it will fit on stock suspension and will allow for rotating tires due to the square setup. Do you think the loss of width in the front and rear is worth having the ability to rotate? Will this setup need spacers to sit flush with the fender?
What width tires are you wanting to use? And what is your driving style?

If you don't floor it very often or take turns quickly then you probably won't notice the thinner tires. If you do drive spiritedly, I'd advise against going any smaller than the stock 245 in the rear
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      10-06-2017, 03:38 PM   #844
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Quote:
Originally Posted by rob_h View Post
Looking to run a 17x9 255/40 setup on a race car. When you say you have a ton of strut clearance, do you mean up front? Could you get by with less of a spacer?
Fitting a 255 and a 9" wide front wheel is tough on a 1 Series - details down to the exact tire you choose are relevant.

Here is Vorshlag's test fit of a 17x9 +36 (+41 with a 5mm spacer) with a narrow 255 and it appears to fit just fine:


On the other hand, my 17x9 +35 with a 255 RE71R which is a MUCH wider tire is an extremely tight fit and rubs over bumps. I have Ohlins coilovers and with that wide tire, there is no way that a +42 would not rub the strut. Maybe with a smaller tire it wouldn't, but with my RE71R, it definitely would.

-Mark
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      10-06-2017, 04:10 PM   #845
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Quote:
Originally Posted by BimmerAg View Post
What width tires are you wanting to use? And what is your driving style?

If you don't floor it very often or take turns quickly then you probably won't notice the thinner tires. If you do drive spiritedly, I'd advise against going any smaller than the stock 245 in the rear
I definitely don't want anything smaller than stock. 245-255 in the rear should be fine for me. I do enjoy taking a turn quickly hear and there and accelerating quickly from a stop. However, I tend to drive calmly for the most part. I guess I'm mostly concerned with tire width options at 8' instead of 8.5/9.5.
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      10-06-2017, 05:29 PM   #846
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Quote:
Originally Posted by Mr. Pharaoh View Post
I definitely don't want anything smaller than stock. 245-255 in the rear should be fine for me. I do enjoy taking a turn quickly hear and there and accelerating quickly from a stop. However, I tend to drive calmly for the most part. I guess I'm mostly concerned with tire width options at 8' instead of 8.5/9.5.
245 on a ET35 wheel will probably rub in the front unless you roll your fenders. I wouldn't worry too much about the 8" wheel width; you may lose a little bit of transient response but it should be fine for a daily driver
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      10-11-2017, 10:25 AM   #847
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Quote:
Originally Posted by Mr. Pharaoh View Post
Hey Everyone,

What is your take on a square setup 18x8 ET 35 for a daily? From the research I have done it will fit on stock suspension and will allow for rotating tires due to the square setup. Do you think the loss of width in the front and rear is worth having the ability to rotate? Will this setup need spacers to sit flush with the fender?
if you have 225s all around,it should fit. i can't see why it wouldn't fit.

still,it's going to be hella flush or borderline mexi-poke,if anything.
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      10-11-2017, 04:57 PM   #848
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Originally Posted by durpflip View Post
if you have 225s all around,it should fit. i can't see why it wouldn't fit.

still,it's going to be hella flush or borderline mexi-poke,if anything.
So I guess the ultimate question is then is it worth going down to 225's all around? Is the loss in tire width super noticeable? Nice use of the word hella btw.
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      10-13-2017, 11:21 AM   #849
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Wheels: BMW Style 68
Front: 17x7.5 ET41
Rear: 17x8.5 ET50

Tires: Continental ExtremeContact
Front 245/40R-17
Rear 255/40R-17

Suspension/Fender Mods/Camber:
none

No rubbing that I've noticed during street driving. Will update after autocross this weekend on how they do when pushed

EDIT: Didn't notice any rubbing during autoX this weekend. The car felt much more neutral with the 245's up front, but I will say that I was disappointed in the overall level of grip from these tires. They're old Conti ExtremeContact DW tires and they felt like they had lower total grip than the stock size RE050A RFT's that I have used in previous events. In the market for a set of good tires (RE71, Rivals, Direzza, etc) and trying to decide whether I should stick with 245's up front or try 235's since high-performance tires tend to run a little wider...
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Last edited by BimmerAg; 10-16-2017 at 03:18 PM.
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      10-14-2017, 12:44 PM   #850
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Quote:
Originally Posted by Mr. Pharaoh View Post
So I guess the ultimate question is then is it worth going down to 225's all around? Is the loss in tire width super noticeable? Nice use of the word hella btw.
to be honest with you,i wouldn't know the difference in grip. you'd have to ask another member here.

GL in your wheel endeavours though
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      11-01-2017, 02:53 AM   #851
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2011 BMW E82  [0.00]
Wheels: BBS RS-GT
Front: 18x8.5 ET35
Rear: 18x8.5 ET35

Tires: Bridgestone Blizzak
Front 225/45R-18
Rear 225/45R-18

Suspension/Fender Mods/Camber:
none

NOTE: Wheels came off an M3, were the guys winter setup hence the tires. Rubbing a little little tiny bit in the front with 2 people on big dips but that will be taken care of with new suspension and better tires after the winter. Back clearance is fine

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      11-14-2017, 10:26 AM   #852
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Quote:
Originally Posted by Justin_Gepner View Post
Wheels: BBS RS-GT
Front: 18x8.5 ET35
Rear: 18x8.5 ET35

Tires: Bridgestone Blizzak
Front 225/45R-18
Rear 225/45R-18

Suspension/Fender Mods/Camber:
none

NOTE: Wheels came off an M3, were the guys winter setup hence the tires. Rubbing a little little tiny bit in the front with 2 people on big dips but that will be taken care of with new suspension and better tires after the winter. Back clearance is fine


How have you been liking this setup? The wheels I'm looking at are this exact size, and I was gonna run whatever size tire would end up being OEM diameter - I think 225/40R18
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Last edited by desertman123; 11-14-2017 at 01:31 PM.
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      11-14-2017, 01:36 PM   #853
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Quote:
Originally Posted by desertman123 View Post
How have you been liking this setup? The wheels I'm looking at are this exact size, and I was gonna run whatever size tire would end up being OEM diameter - I think 225/40R18
I like the setup a lot. The front has just the right amount of poke. Not to far out to be slamming fender but looks more aggressive, wish the rear was out a little more but Iíll get spacers eventually. The car feels better to drive as well!
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      11-14-2017, 04:10 PM   #854
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looked through the whole thread and couldn't find anyone running this. Would it work with the rears rolled and pulled?

19x9.5 et40 255/30
19x8.5 et35 225/35

lowered on h&r coils
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      11-14-2017, 08:46 PM   #855
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Those are doable, but will depend on your tire choice and alignment.

Front will be no problem as long as you have camber plates - I would estimate you will need 2 degrees camber. I ran an 8.5" +35 front with a 225 Conti DWS with my 3.5 degrees camber and had TONS of room.

Rear will require a roll for sure, and probably a pull. I ran a 9.5" +45 with my 255 Conti DWS with rolled (but not pulled at all) fenders and it absolutely did not rub under any circumstances. If you ran the same tire as me (which is quite narrow for a 255), you would be close to getting away with it with just a roll - might need a bit more roll. If you wanted to run a wider 255, you'll need a pull.

-Mark
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      11-15-2017, 01:08 PM   #856
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Awesome, thanks Mark. Fenders are rolled and pulled already to fit street radials so your response inspires confidence. I think they will fit.
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