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[wchane]

Searched through the archives and couldn't find anything conclusive.

Just picked up an e88 for summer.

Looking to fit 18x8.5 et35

235/40 18 Michelin PSS all around

Lowering on AST 2000 series coils.

Thoughts?

[xQx]

Interested to know too.

I'm told you need 10mm spacers on the front, not sure what camber you have to run. I was considering 245/35 18's on stock coils...

[wchane]

Originally Posted by xQx

Interested to know too.

I'm told you need 10mm spacers on the front, not sure what camber you have to run. I was considering 245/35 18's on stock coils...

I'd be ok running spacers as long as this set up does not require poke or stretch to work. Oh, I also do not want to look like a 4x4.

[Zombie1]

You'll be compromising the ride with that set up. I'm lowered on TC Kline's with 18x9et38 hankook 215s up front with a 3mm spacer and 18x10et40 out back on Hankook 245s. I rub slightly up front on big dibs mid turn but nothing bad. The back is flush with fender literally no more room.

[wchane]

Originally Posted by Zombie1

You'll be compromising the ride with that set up. I'm lowered on TC Kline's with 18x9et38 hankook 215s up front with a 3mm spacer and 18x10et40 out back on Hankook 245s. I rub slightly up front on big dibs mid turn but nothing bad. The back is flush with fender literally no more room.

You think I should run different tires front & rear?

The rims also come in 18x9.5 et35

[blinded]

IMHO, et35 isn't a good offset in the front or rear, especially with 235s. You'll have space inboard but it will take work on the fender side. You'd be better off above et40.

[zapatista]

Originally Posted by wchane

Searched through the archives and couldn't find anything conclusive.

Just picked up an e88 for summer.

Looking to fit 18x8.5 et35

235/40 18 Michelin PSS all around

Lowering on AST 2000 series coils.

Thoughts?

I ran 235/40 18 Gooyear F1 Eagle Asymmetric 2's on my E88 on 18x8 et45's with no problem. No rubbing on Koni Yellows with H&R Sport Springs and Dinan Fixed Camber Plates plus some decent negative camber in the front. No spacers and I'm not sure if PSS are really wider than the Eagles.

[wchane]

Thanks all. I'm giving up on these wheels and going to custom route.

[deesea]

Originally Posted by Zombie1

You'll be compromising the ride with that set up. I'm lowered on TC Kline's with 18x9et38 hankook 215s up front with a 3mm spacer and 18x10et40 out back on Hankook 245s. I rub slightly up front on big dibs mid turn but nothing bad. The back is flush with fender literally no more room.

I'm looking to do something similar. 18x9 ET45 square.

What tires are you running?

Thinking of 225/255 Direzza ZII Star Specs which should be a lot wider than their stated section widths.

[lowside67]

Originally Posted by blinded

IMHO, et35 isn't a good offset in the front or rear, especially with 235s. You'll have space inboard but it will take work on the fender side. You'd be better off above et40.

Unfortunately the hub design of the 1 series means as soon as you want an 8.5" or larger wheel to properly fit (no rubbing) with an appropriate sized tire (a 235-245), there is an extremely small window of will perfectly work front and rear. Moving to coilovers from stock suspension and ensuring the coilovers are set up properly in the front (ie that the tire tucks underneath them) is essential.

Note: to fit an 8.5" front wheel, you will need camber plates to gain some significant front camber (in my estimate, -2.2 to -2.5 degrees depending on ride height assuming a 235 street tire).

Front Wheel Fitment

Excuse the dirt, but this is what I mean by a properly set up front coilover:


That photo is a 9" wide +35 offset with a 255-40-17 Bridgestone RE71R.

Here is a photo of a 8.5" wide +45 offset without tire

On an 8.5" wheel with a 235, I estimate an offset of +45 would fit, but it will come down to the tire. I can guarantee anything lower than a +41 would fit as that is mathematically identical to the above fitment.

Rear Wheel Fitment

On the rear, you have the exact opposite problem. You have lots of room on the inside, but clearance to the fender is a challenge.

I have verified that a 9" wide +45 offset with a 255-40-17 Bridgestone RE71R will just clear with -2 degrees of camber and rolled fenders.

I have also verified that a 9.5" wide +45 offset with a 255-35-18 Continental DWS will fit with some extra room because the tire is a bit stretched and significantly rounder in profile.

On an 8.5" wheel with a 235, I estimate an offset of +35 would fit, but can guarantee anything HIGHER than a +39 would fit as that is mathematically identical to my fitment.

Summary

As you can see, an 8.5" +40 is in theory the perfect square front & rear fitment that should work with certainty on front and rear as long as your alignment will fit. An 8.5" +35 will fit just fine in the front (though requires a little more camber than a +40 since it sticks out further) but is an aggressive fitment on the rear and without rolled fenders and some camber, you will likely get the occasional rub when you go over a big bump.

Hope that helps,
Mark

[DarkWing6]

This is great info, Mark.

I'm looking at a square setup that's 18x8.5 +38 on stock suspension. Based on what you're saying, it seems as thought this could work... or would I need the camber from a coil over setup?

[MightyMouseTech]

Originally Posted by lowside67

Unfortunately the hub design of the 1 series means as soon as you want an 8.5" or larger wheel to properly fit (no rubbing) with an appropriate sized tire (a 235-245), there is an extremely small window of will perfectly work front and rear. Moving to coilovers from stock suspension and ensuring the coilovers are set up properly in the front (ie that the tire tucks underneath them) is essential.

Note: to fit an 8.5" front wheel, you will need camber plates to gain some significant front camber (in my estimate, -2.2 to -2.5 degrees depending on ride height assuming a 235 street tire).

Front Wheel Fitment

Excuse the dirt, but this is what I mean by a properly set up front coilover:


That photo is a 9" wide +35 offset with a 255-40-17 Bridgestone RE71R.

Here is a photo of a 8.5" wide +45 offset without tire

On an 8.5" wheel with a 235, I estimate an offset of +45 would fit, but it will come down to the tire. I can guarantee anything lower than a +41 would fit as that is mathematically identical to the above fitment.

Rear Wheel Fitment

On the rear, you have the exact opposite problem. You have lots of room on the inside, but clearance to the fender is a challenge.

I have verified that a 9" wide +45 offset with a 255-40-17 Bridgestone RE71R will just clear with -2 degrees of camber and rolled fenders.

I have also verified that a 9.5" wide +45 offset with a 255-35-18 Continental DWS will fit with some extra room because the tire is a bit stretched and significantly rounder in profile.

On an 8.5" wheel with a 235, I estimate an offset of +35 would fit, but can guarantee anything HIGHER than a +39 would fit as that is mathematically identical to my fitment.

Summary

As you can see, an 8.5" +40 is in theory the perfect square front & rear fitment that should work with certainty on front and rear as long as your alignment will fit. An 8.5" +35 will fit just fine in the front (though requires a little more camber than a +40 since it sticks out further) but is an aggressive fitment on the rear and without rolled fenders and some camber, you will likely get the occasional rub when you go over a big bump.

Hope that helps,
Mark

Great info Mark!

I am thinking of going with similar front coilovers. What length of front spring did you use to give you that clearance? 7"?

[ShocknAwe]

Originally Posted by MightyMouseTech

Great info Mark!

I am thinking of going with similar front coilovers. What length of front spring did you use to give you that clearance? 7"?

7" spring with a camber plate upper will give you good clearance of the lower spring perch. 7" with OE top hat will give you trouble.

Damper tube clearance may require small spacers if using Ohlins.

[gtjosh]

Originally Posted by lowside67

Unfortunately the hub design of the 1 series means as soon as you want an 8.5" or larger wheel to properly fit (no rubbing) with an appropriate sized tire (a 235-245), there is an extremely small window of will perfectly work front and rear. Moving to coilovers from stock suspension and ensuring the coilovers are set up properly in the front (ie that the tire tucks underneath them) is essential.

Note: to fit an 8.5" front wheel, you will need camber plates to gain some significant front camber (in my estimate, -2.2 to -2.5 degrees depending on ride height assuming a 235 street tire).

Front Wheel Fitment

Excuse the dirt, but this is what I mean by a properly set up front coilover:


That photo is a 9" wide +35 offset with a 255-40-17 Bridgestone RE71R.

Here is a photo of a 8.5" wide +45 offset without tire

On an 8.5" wheel with a 235, I estimate an offset of +45 would fit, but it will come down to the tire. I can guarantee anything lower than a +41 would fit as that is mathematically identical to the above fitment.

Rear Wheel Fitment

On the rear, you have the exact opposite problem. You have lots of room on the inside, but clearance to the fender is a challenge.

I have verified that a 9" wide +45 offset with a 255-40-17 Bridgestone RE71R will just clear with -2 degrees of camber and rolled fenders.

I have also verified that a 9.5" wide +45 offset with a 255-35-18 Continental DWS will fit with some extra room because the tire is a bit stretched and significantly rounder in profile.

On an 8.5" wheel with a 235, I estimate an offset of +35 would fit, but can guarantee anything HIGHER than a +39 would fit as that is mathematically identical to my fitment.

Summary

As you can see, an 8.5" +40 is in theory the perfect square front & rear fitment that should work with certainty on front and rear as long as your alignment will fit. An 8.5" +35 will fit just fine in the front (though requires a little more camber than a +40 since it sticks out further) but is an aggressive fitment on the rear and without rolled fenders and some camber, you will likely get the occasional rub when you go over a big bump.

Hope that helps,
Mark

Great info Mark, but I have one more question and maybe I skipped over the info or didn't understand it somewhere. I am looking to buy a square set up of 18X8.5" +40 wheels but would have a recommendation with what size tires to run on this set up?

[lowside67]

In my opinion, a 245-35-18 street tire is ideal on an 8.5" wide wheel. You could probably fit a 255 in most tires but I would not recommend it if you are choosing an ultra high performance tire such as the Bridgestone RE71R as they tend to run wide and it's even a little pinched on my 9" wide wheels.

Mark