[blumagic]

Originally Posted by f30dman

Anything else I need to know about this combo? My shocks are going out and i would like to lower my car with the b8's. This is going to be my daily btw.

With b8s normal road conditions are not far off from oem. The sharp bumps like poorly done freeway transitions can be brutal. I think farkles thread elaborates more about the rebound

[im_an_alien]

Test fitted the arc8 wheels, 18x8.5 et38 fits very comfortably up front. I had got some 5mm spacers just in case but thankfully I won't be needing those. There is about 15mm clearance from the inner edge of the wheel to the strut. Now if only the tires would get here...

[Desertnate]

How tight is the clearance around the brake calipers?

Spacing on my 18" winters with the same brakes is really tight which makes cleaning around that area nearly impossible. Not a deal breaker, but it is a hassle to maintain the wheels.

[Expert@ApexWheels]

Originally Posted by Desertnate

How tight is the clearance around the brake calipers?

Spacing on my 18" winters with the same brakes is really tight which makes cleaning around that area nearly impossible. Not a deal breaker, but it is a hassle to maintain the wheels.

The vast majority of our 18" wheels will clear the OE brakes on this chassis, but if you're looking for the best clearance around the brake calipers for cleaning purposes, I would probably recommend our EC-7s or SM-10s in the 18x9 ET30/31 size as both the offset and spoke shape will give you more room to work around the calipers when cleaning. Our 18x8.5 ET38 ARC-8s clear those brakes but their spoke shape and offset will reduce the room around the calipers.

-Tom

[Desertnate]

Originally Posted by Expert@ApexRaceParts

The vast majority of our 18" wheels will clear the OE brakes on this chassis, but if you're looking for the best clearance around the brake calipers for cleaning purposes, I would probably recommend our EC-7s or SM-10s in the 18x9 ET30/31 size as both the offset and spoke shape will give you more room to work around the calipers when cleaning. Our 18x8.5 ET38 ARC-8s clear those brakes but their spoke shape and offset will reduce the room around the calipers.

-Tom

Thanks, Tom!

18's are always going to be tight with the larger brakes, but it's good to know which wheels give you a bit more breathing room.

[2000to18]

Thinking of replacing OEM 225/45/18 P7s on 2018 340i M-sport with adaptive M suspension.Will I have any issues with 8.5" x 18 SM-10s with 235/40/18s? Given my location, and even though I have a dedicated winter set, I will have to go with UHP all seasons, thinking of Pilot Sport All Season 4. Thanks.

[Expert@ApexWheels]

Originally Posted by 2000to18

Thinking of replacing OEM 225/45/18 P7s on 2018 340i M-sport with adaptive M suspension.Will I have any issues with 8.5" x 18 SM-10s with 235/40/18s? Given my location, and even though I have a dedicated winter set, I will have to go with UHP all seasons, thinking of Pilot Sport All Season 4. Thanks.

Hi there,

The 18x8.5" ET35 square setup with 235/40-18 tires at all four corners will be a complete direct fit on a stock 340i M sport. The Michelin AS4's will be a great pairing for those wheels in a 235/40-18 and will make for a fantastic DD setup.

If you have any additional questions, please let me know!

-Geirsen

[para38super]

Originally Posted by Expert@ApexRaceParts

Hi there,

The 18x8.5" ET35 square setup with 235/40-18 tires at all four corners will be a complete direct fit on a stock 340i M sport. The Michelin AS4's will be a great pairing for those wheels in a 235/40-18 and will make for a fantastic DD setup.

If you have any additional questions, please let me know!

-Geirsen

Why is the recommended size smaller than stock size? Why not 245/40-18 which is closer to stock?

[Expert@ApexWheels]

Originally Posted by para38super

Why is the recommended size smaller than stock size? Why not 245/40-18 which is closer to stock?

For the 18x8.5" ET35 square setup you can run a 225/45-18, 235/40-18, or 245/40-18 tire as a complete direct fit.

-Geirsen

[fscuderia23]

Originally Posted by f30dman

How is the ride on the b6s with lowering springs? Do you have to go sideways over everything?

its not too much lower! only about a half inch lower than stock m-sport. I think I lost some rake as well, the rears seemed to drop a little more than the fronts but that could just be me. The ride is a little harsher for sure, however it handles impacts from road imperfections a lot better; its a lot less crashier than stock. Of course in the canyons its a vast improvement as well.

I recently swapped out the original tire size for 235 front and 265 rear, definitely more of a meaty look. No fitment issues at all tho!

[JayGee2492]

Originally Posted by Expert@ApexRaceParts

I would recommend our 18x9.5 ET35 or ET45 in the rear instead of the ET28. Even the ET35 is quite aggressive with the appropriate tires. The ET28s will likely cause rubbing.

If you are going with 9.5 inch wheels in the rear, I would also recommend going with a wider rear tire. If the plan is to run the 245/40-18s all the way around, I would recommend running 18x9 ET30 wheels both front and rear instead. These are more than sufficient in terms of width to support those tires and will be a direct fit. The square wheels and tires will also allow you to rotate between the front and rear axles as the tires wear to even out any difference in the wear rate.

-Tom

Im thinking of running 18x9 ET30/18x9.5 ET35. Not looking to lower the car so I’m curious what would this setup look like on rwd stock m sport adaptive suspension.

[Expert@ApexWheels]

Originally Posted by reyoasian

Interested in ARC-8 in 18x9 +30 to pair with existing 245/40R18 595RS-RR tires
Will be lowered on B14's
Anyone have experience with similar setups and what is your clearance like?
Is this spec a flat or concave face?

Someone else may have to step in with the clearance info you need, but the 18x9 ET30s are profile 3 max concavity on our ARC-8 design and profile 2 medium concavity on our forged ARC-8R design for better brake clearance.

Originally Posted by JayGee2492

Im thinking of running 18x9 ET30/18x9.5 ET35. Not looking to lower the car so I’m curious what would this setup look like on rwd stock m sport adaptive suspension.

This thread is a good example of what this setup would look like:

https://f30.bimmerpost.com/forums/sh...highlight=apex

-Tom

[leadfoot12]

I've been doing a lot of tracking with my current Apex setup and I absolutely love it. It looks great and drives phenomenally. Here are the specs:

18x9 ET31 front and 18x9.5 ET43 rear
245/40R18 and 275/35R18 tires repsectively.

Curious if anyone has any thoughts on whether I'd benefit from trying to run a square setup? Also, maybe I'm thinking a little crazy here but could I run an 18x9.5 ET43 in the front and run a 275/35R18 square? If it fits that would look mean!

[alohasurftoad]

Originally Posted by leadfoot12

Also, maybe I'm thinking a little crazy here but could I run an 18x9.5 ET43 in the front and run a 275/35R18 square? If it fits that would look mean!

18x9.5 ET43 with 275/35/18 will not fit up front.

right now your current setup is just about as good as it gets, however i believe 255/40/18 front and 265/40/18 rear would reduce the understeer caused by the stagger and be even better at the track.

[leadfoot12]

Originally Posted by alohasurftoad

18x9.5 ET43 with 275/35/18 will not fit up front.

right now your current setup is just about as good as it gets, however i believe 255/40/18 front and 265/40/18 rear would reduce the understeer caused by the stagger and be even better at the track.

Bummer.

Those tire sizes would fit ok with my current wheels?

[JayGee2492]

Originally Posted by Expert@ApexRaceParts

Someone else may have to step in with the clearance info you need, but the 18x9 ET30s are profile 3 max concavity on our ARC-8 design and profile 2 medium concavity on our forged ARC-8R design for better brake clearance.



This thread is a good example of what this setup would look like:

https://f30.bimmerpost.com/forums/sh...highlight=apex

-Tom

He’s lowered on H&R springs tho. From what I have read these specs tend to poke out on stock suspension, I was just curious to how much poke. Any input of the most aggressive/flush fitment (wheel + tire) you can have on the stock (rwd m sport adaptive suspension) would be greatly appreciated (staggered/squared). I just want to be as close to the fender as possible w/o rubbing, spacers or poke

[alohasurftoad]

Originally Posted by leadfoot12

Bummer.

Those tire sizes would fit ok with my current wheels?

Since you are not xdrive, no problem, fits no issues

[Expert@ApexWheels]

Originally Posted by JayGee2492

He’s lowered on H&R springs tho. From what I have read these specs tend to poke out on stock suspension, I was just curious to how much poke. Any input of the most aggressive/flush fitment (wheel + tire) you can have on the stock (rwd m sport adaptive suspension) would be greatly appreciated (staggered/squared). I just want to be as close to the fender as possible w/o rubbing, spacers or poke

We don't currently have any shots of the 18x9.5 ET35s at stock height with stock suspension. If you are looking for a fitment with zero poke, the 18x9.5 ET43 might be the better option, but it won't be as aggressive.


245/40R18 MPS4S on 18x9 ET31
275/35R18 MPS4S on 18x9.5 ET43

Suspension:
Stock M Sport suspension

Alignment changes:
None, no rubbing.

Body modifications:
None

-Tom

[leadfoot12]

Originally Posted by alohasurftoad

Since you are not xdrive, no problem, fits no issues

One more question, I've still got plenty of life left in my rear tires.

Any reason not to do just the front as a 255/40R18 for now and run it with my 275/35R18 rear. The front tire will be slightly taller. Is that problematic?

[alohasurftoad]

Originally Posted by leadfoot12

One more question, I've still got plenty of life left in my rear tires. Any reason not to do just the front as a 255/40R18 for now and run it with my 275/35R18 rear. The front tire will be slightly taller. Is that problematic?

since you are rwd, there is no problem with that, just the visual appearance which you're already aware of.

[MikeyMrtnz]

Switched to Apex center caps.

[JayGee2492]

Originally Posted by Expert@ApexRaceParts

We don't currently have any shots of the 18x9.5 ET35s at stock height with stock suspension. If you are looking for a fitment with zero poke, the 18x9.5 ET43 might be the better option, but it won't be as aggressive.


245/40R18 MPS4S on 18x9 ET31
275/35R18 MPS4S on 18x9.5 ET43

Suspension:
Stock M Sport suspension

Alignment changes:
None, no rubbing.

Body modifications:
None

-Tom

Thank you very much. So the 18x9 ET30/31 will fit fine with no poking out on stock height? How about if i were to run a square setup would I be fine also?