[OG Shark]

Can a square set of 18x10 ET25 fit an '18? 3mm in the front and 15mm in rear maybe? Or will the 10" wheel on the front still be an issue? Going to be running Ohlins R&T and camber plates. Will be for track use only. Thanks!

[detroitm2]

So I cant comment with the ohlins suspension. You'll need to check to see if the shock bodies/springs are close to stock. I am using H&R sport springs, and TC-Kline camber plates.

I have a set of Apex 18x10 ET33 wheels. When I measured them, I needed 15mm spacers in the front to clear the suspension, and a fair bit of camber to clear the fenders. I was measuring with 275/35 Hoosier R7 tires.

With the ET25's in the front, you're already 8mm out from where I started. That leaves ~ 7mm you'll need for spacers. (Again, you need to measure this yourself, different suspension and tires will affect this).

On the rears, you're going to have a problem. Stock offset is 40mm. With my ET33's, they only stick out an additional 7mm with 265/35 tires, or 12mm with 275/35 tires. This still leaves some clearance inside of the fenders. However, with ET25, those are going to stick out 15mm with 265/35 tires (which may still fit) or 20mm with 275/35 tires (this probably will not fit without aggressive camber and/or fender rolling.)

Remember, The lower the ET, the farther then are going to stick out. You wont be able to put any spacers in the rear with ET25. Ideally, you'll want to get close to 30 or 35mm offset for a square setup. Particularly if you plan on running 275/35 tires.

Hope this helps!

[OG Shark]

Originally Posted by detroitm2

So I cant comment with the ohlins suspension. You'll need to check to see if the shock bodies/springs are close to stock. I am using H&R sport springs, and TC-Kline camber plates.

I have a set of Apex 18x10 ET33 wheels. When I measured them, I needed 15mm spacers in the front to clear the suspension, and a fair bit of camber to clear the fenders. I was measuring with 275/35 Hoosier R7 tires.

With the ET25's in the front, you're already 8mm out from where I started. That leaves ~ 7mm you'll need for spacers. (Again, you need to measure this yourself, different suspension and tires will affect this).

On the rears, you're going to have a problem. Stock offset is 40mm. With my ET33's, they only stick out an additional 7mm with 265/35 tires, or 12mm with 275/35 tires. This still leaves some clearance inside of the fenders. However, with ET25, those are going to stick out 15mm with 265/35 tires (which may still fit) or 20mm with 275/35 tires (this probably will not fit without aggressive camber and/or fender rolling.)

Remember, The lower the ET, the farther then are going to stick out. You wont be able to put any spacers in the rear with ET25. Ideally, you'll want to get close to 30 or 35mm offset for a square setup. Particularly if you plan on running 275/35 tires.

Hope this helps!

Soooo yeah I was looking at it backwards Much appreciated!

[CosmosMpower]

yes it fits but will be tight if you're lowered much. You'll need a bit of negative camber front and rear. I ran up to a 285/30/18 Hoosier on a 18x10 ET25 Apex EC7 on my M2. 275/35/18 fits flush.

[OG Shark]

Originally Posted by CosmosMpower

yes it fits but will be tight if you're lowered much. You'll need a bit of negative camber front and rear. I ran up to a 285/30/18 Hoosier on a 18x10 ET25 Apex EC7 on my M2. 275/35/18 fits flush.

Very interesting - so not have to run any spacers with that setup? How much camber did you need in the rear? Have a set of 275/35/18 Hoosier Wets on them for what is turning out to be typical COTA weather for me lately. Planning on massaging some R7's on the stock wheels to get me through the weekend & would be nice to have something a little less spinny if it gets wet out there.

[detroitm2]

Originally Posted by CosmosMpower

yes it fits but will be tight if you're lowered much. You'll need a bit of negative camber front and rear. I ran up to a 285/30/18 Hoosier on a 18x10 ET25 Apex EC7 on my M2. 275/35/18 fits flush.

Interesting. When I measure for my spacers with 275/35 Hoosiers, there's no way that ET25 (effectively) would have cleared the suspension. My ET33 with 12mm would not even fit. And the 285/30 are even wider. I find it hard to believe that the reduced height of the 30 series makes that much of a difference.

I test fit all of this using an ECS spacer fitment kit.

[CosmosMpower]

Originally Posted by OG Shark

Very interesting - so not have to run any spacers with that setup? How much camber did you need in the rear? Have a set of 275/35/18 Hoosier Wets on them for what is turning out to be typical COTA weather for me lately. Planning on massaging some R7's on the stock wheels to get me through the weekend & would be nice to have something a little less spinny if it gets wet out there.

No spacers. I ran -2.75 front, -2 rear. Stock suspension. The ride height is what kept it from hitting the fender.

More info here: https://f87.bimmerpost.com/forums/sh....php?t=1370889

[dvas]

I'm also running an 18x10 33ET square setup with Apex SM-10 wheels. Lowered with Bilsteins and camber plates at -3.2. 12mm spacer up front. No rubbing issues with either RE-71s or NT01s at 275/35/18. Haven't ran Hoosiers.