[mclovin69x]

I recently purchased a used F36 2018 440i Gran Coupe RWD. It came with the Track Handling Package so it has upgraded M brakes (large slotted rotors in front) and 704M 19" staggered wheels (225/40/19 and 255/35/19).

The problem is that I live in Atlanta and some of the roads within the city are horrible.. I'm pretty sure I've already bent one wheel after hitting a pothole. And yes, the car came with run flats which I absolutely hate.

I want to downgrade to 18" wheels and tires with a taller sidewall for more comfort within city driving. I will probably drive it on the track once a year but do some spirited mountainous driving every month so don't want to take too much of a hit on handling.

Anyway with my current setup, since I have to buy new 18" wheels anyway, I want to upgrade to the widest tires that I can possibly get for the car without any modifications to the suspension or fenders.

TL;DR: What are the widest possible wheels/tires I can mount on my 2018 440i GC RWD w/ M brakes without any modifications? Would be great if I could get wheel size, tire size and offset options.

Thanks!

[alohasurftoad]

widest practical is
255/40/18 front, optimum wheel width 9", min 8.5" max 9.5" up front, offset between ET30-35, ET35 if 9.5"
285/35/18 rear, optimum wheel width 10" or 10.5", min 9.5", max 10.5" at rear. offset between ET40-45, ET45 if 10.5"

what wheels are you considering?
.

[mclovin69x]

Thanks for the info. With your info, I'd plan:
FR: 18x9 w/ 255/45/18
RR: 18x10 w/ 285/40/18

Do you think these sidewalls will work?

I honestly have no idea about what wheels I'd choose, I don't even know where/how to start looking. But for tires I'm considering either PS A/S or Continental DWS 06 (A/S)

[alohasurftoad]

Originally Posted by mclovin69x

With your info, I'd plan:
FR: 18x9 w/ 255/45/18
RR: 18x10 w/ 285/40/18
Do you think these sidewalls will work? I honestly have no idea about what wheels I'd choose, I don't even know where/how to start looking. But for tires I'm considering either PS A/S or Continental DWS 06 (A/S)

our cars OEM diameter is 26". 255/45/18+285/40/18 are both 27" and 1" too tall. they will NOT work.

it is very important you are within the offset range i have given for the wheels that you choose.

what is your total budget? for wheels/tires/tpms/etc. what wheel style desired?

if you can obtain some used 513M or checkout Apex FL-5 or EC-7 for now. if i think of something else i'll post later

[F30FoxCat]

Originally Posted by alohasurftoad

our cars OEM diameter is 26". 255/45/18+285/40/18 are both 27" and 1" too tall. they will NOT work.

it is very important you are within the offset range i have given for the wheels that you choose.

what is your total budget? for wheels/tires/tpms/etc. what wheel style desired?

if you can obtain some used 513M or checkout Apex FL-5 or EC-7 for now. if i think of something else i'll post later

I was considering doing a square setup with 255/40/18, would this rub? I'm not exactly sure how to figure this out.

[alohasurftoad]

Originally Posted by F30FoxCat

I was considering doing a square setup with 255/40/18, would this rub? I'm not exactly sure how to figure this out.

255/40/18 at ET35ish. Lower offsets poke more. So not lower than ET30, or tire might graze the fenderwell liner when turning sharply.

[johnung]

Originally Posted by mclovin69x

Thanks for the info. With your info, I'd plan:
FR: 18x9 w/ 255/45/18
RR: 18x10 w/ 285/40/18

Do you think these sidewalls will work?

I honestly have no idea about what wheels I'd choose, I don't even know where/how to start looking. But for tires I'm considering either PS A/S or Continental DWS 06 (A/S)

You will notice a huge comfort difference and greater ability to smooth out potholes and rough roads by switching to non-runflats, and from 19” to 18”. No more teeth rattling. The DWS06+ are rated a little higher but can’t go wrong with either tire.

[mclovin69x]

Thanks for the responses. So I kinda switched directions and I'm leaning more toward a square setup now.

I found these wheels (18x9.5; 5x120; ET36): https://www.bbwheelsonline.com/verde...hoCYHQQAvD_BwE

Planning to put 255/40/18 (26" diameter) DWS 06+ on them.

Y'all think this could work?

My budget would probably be under $1500. I really don't want to spend money on this but I'm hoping I could get around $1000 back at least by selling my 704M wheels (CarMax put brand new tires on the front yesterday, but they put run flats

[alohasurftoad]

Originally Posted by mclovin69x

So I kinda switched directions and I'm leaning more toward a square setup now.
I found these wheels (18x9.5; 5x120; ET36): https://www.bbwheelsonline.com/verde...hoCYHQQAvD_BwE
Planning to put 255/40/18 (26" diameter) DWS 06+ on them.
Y'all think this could work?

My budget would probably be under $1500. I really don't want to spend money on this but I'm hoping I could get around $1000 back at least by selling my 704M wheels (CarMax put brand new tires on the front yesterday, but they put run flats

with 255/40/18 on 9.5", ET35 is the highest offset up front. i know we're talking 1mm but below is 255/35/19 on 9.5" @ ET35, same 3dimensional footprint. notice how close the inner rim lip is to the strut.
https://f30.bimmerpost.com/forums/sh...8&postcount=16

you can run ET36 if the rim width is 9" or 8.5", though.

how about these?
https://www.aodhanwheels.com/collect...43630946779395
https://www.aodhanwheels.com/collect...37849198657693
.

[mclovin69x]

Originally Posted by alohasurftoad

with 255/40/18 on 9.5", ET35 is the highest offset up front. i know we're talking 1mm but below is 255/35/19 on 9.5" @ ET35, same 3dimensional footprint. notice how close the inner rim lip is to the strut.
https://f30.bimmerpost.com/forums/sh...8&postcount=16

you can run ET36 if the rim width is 9" or 8.5", though.

how about these?
https://www.aodhanwheels.com/collect...43630946779395
https://www.aodhanwheels.com/collect...37849198657693
.

Damn you're right, that is very tight. In that case I might just go down a size in the front (18x9). I'll then probably try to do 18x10.5 in the rear. Staggered might be the way to go here..

I'm still looking for rims and tires. I don't want to spend so much on brand new ones so I'm looking around for used options. A lot of wheels that came off M cars for around 1800$ but they're too big. I came across a set Apex SM10 (10" and 11") with PS4s)

Any idea how much I'd be able to sell my 704Ms with 19" runflats on them for?

[mclovin69x]

Anyone know if these wheels would work on my car?

https://www.facebook.com/marketplace...b-8239e0c53a10

[mclovin69x]

Originally Posted by alohasurftoad

with 255/40/18 on 9.5", ET35 is the highest offset up front. i know we're talking 1mm but below is 255/35/19 on 9.5" @ ET35, same 3dimensional footprint. notice how close the inner rim lip is to the strut.
https://f30.bimmerpost.com/forums/sh...8&postcount=16

you can run ET36 if the rim width is 9" or 8.5", though.

how about these?
https://www.aodhanwheels.com/collect...43630946779395
https://www.aodhanwheels.com/collect...37849198657693
.

I found some 219M wheels in a staggered setup for sale near me
18x8.5 +29
245/40/18
18x9.5 +23
265/40/18
They have Continental Extreme Contact tires on them right now

I know that the offsets are off but do you know if these will work alohasurftoad

[alohasurftoad]

Originally Posted by mclovin69x

I found some 219M wheels in a staggered setup for sale near me
18x8.5 +29
245/40/18
18x9.5 +23
265/40/18
They have Continental Extreme Contact tires on them right now

I know that the offsets are off but do you know if these will work alohasurftoad

the rear will be poking far out and may contact the fender lip under compression. it also increases understeer from front/rear tire width stagger and widening rear track. if you do not care that the your handling is worsened, it will fit with those shortcomings.

[mclovin69x]

alohasurftoad thank you for your help so far.

I did a little more research and read more of your posts and I am trying to figure out if this setup will work. Your confirmation/advise would be great.

FR: Bayern Antler 18x9.5 ET35 with DWS 06 255/40/18
https://www.carid.com/beyern-wheels/...AaAg7dEALw_wcB

RR: Bayern Antler 18x9.5 ET45 with DWS 06 265/40/18
https://www.performanceplustire.com/...MaAmVDEALw_wcB

I do have M Brakes in the front (370mm) with the Blue calipers that came with the ZTR package so I'm trying to make sure that the front wheels will clear the brakes - do you know if these rims will clear the front brakes?

Thanks!

[alohasurftoad]

Originally Posted by mclovin69x

alohasurftoadI did a little more research and read more of your posts and I am trying to figure out if this setup will work. Your confirmation/advise would be great.
FR: Bayern Antler 18x9.5 ET35 with DWS 06 255/40/18
RR: Bayern Antler 18x9.5 ET45 with DWS 06 265/40/18
I do have M Brakes in the front (370mm) with the Blue calipers that came with the ZTR package so I'm trying to make sure that the front wheels will clear the brakes - do you know if these rims will clear the front brakes? Thanks!

i'm pretty sure it will clear but since i have not seen someone's car with 18x9.5 ET35 beyern antler up front over BBK, i cannot say with 100% certainty.

if square, it'd be better to run 18x9.5 ET35 with 255/40/18(non-directional tires) square so you can rotate any direction. obviously, it will be 10mm less in the rear than a 265/40/18, so i understand if you want rear at 265 for dig traction.

if you're interested in it staggered, you can do 235/45/18 on 18x8.5 ET30 front, 265/40/18 on 18x9.5 ET45 rear. here's 18" antler on F30
https://www.butlertire.com/gallery/B...r_Wheels/10100

not sure if you are interested in this look, Aodhan AH-X reasonably priced and decently light as well. 255/40/18 square on 18x8.5 ET35(20.24lbs) or 18x9.5 ET35(20.94lbs) if you want more concavity with a slight stretch.
https://www.aodhanwheels.com/collect...43678907924739

[alohasurftoad]

https://www.carid.com/beyern-wheels/...AaAg7dEALw_wcB

be careful with the CARID beyern antler it is listed as 5x120.65. it will fit our 5x120 but is off by a hair, so the lugbolts would closer to the hub by a hair, not perfectly centered.

[mclovin69x]

Originally Posted by alohasurftoad

https://www.carid.com/beyern-wheels/...AaAg7dEALw_wcB

be careful with the CARID beyern antler it is listed as 5x120.65. it will fit our 5x120 but is off by a hair, so the lugbolts would closer to the hub by a hair, not perfectly centered.

Ooh good catch. But I don't think Bayern makes 120.65 (at least according to the models listed on their website), I think this may just be an error on CarID's part.

[mclovin69x]

Originally Posted by alohasurftoad

i'm pretty sure it will clear but since i have not seen someone's car with 18x9.5 ET35 beyern antler up front over BBK, i cannot say with 100% certainty.

if square, it'd be better to run 18x9.5 ET35 with 255/40/18(non-directional tires) square so you can rotate any direction. obviously, it will be 10mm less in the rear than a 265/40/18, so i understand if you want rear at 265 for dig traction.

if you're interested in it staggered, you can do 235/45/18 on 18x8.5 ET30 front, 265/40/18 on 18x9.5 ET45 rear. here's 18" antler on F30
https://www.butlertire.com/gallery/B...r_Wheels/10100

not sure if you are interested in this look, Aodhan AH-X reasonably priced and decently light as well. 255/40/18 square on 18x8.5 ET35(20.24lbs) or 18x9.5 ET35(20.94lbs) if you want more concavity with a slight stretch.
https://www.aodhanwheels.com/collect...43678907924739

I like the Aodhan wheels a lot, however, they are almost 2x the price of the Bayern's. Idk if I like them THAT much more lol

You're right, I don't think the extra 10mm is worth giving up the benefits of having a square setup and rotating.. BUT I can't help but wonder what a 285 on the rear would be like

alohasurftoad in your opinion, what would the handling and ride difference feel like between a 255/40/18 square setup and a 255/40/18 - 285/35/18 staggered setup? - both setups on the same antler wheels

I figured I might as well have all the details before spending $1800 on this set up

[alohasurftoad]

Originally Posted by mclovin69x

alohasurftoad in your opinion, what would the handling and ride difference feel like between a 255/40/18 square setup and a 245/40/18 - 275/35/18 staggered setup?

the difference in ride would be basically imperceptible. the difference in handling depends on what front and rear offsets you choose for the tires and would only be felt at or near the cornering limits

[mclovin69x]

Originally Posted by alohasurftoad

the difference in ride would be basically imperceptible. the difference in handling depends on what front and rear offsets you choose for the tires and would only be felt at or near the cornering limits

Got it. In that case, I will go with the stagger setup since the cost is only about an extra $150ish for the added grip in the rear

Before I pull the trigger, will this work alohasurftoad :
Front: Bayern Antler 18x9.5 ET35 w/ 255/40/18
Rear : Bayern Antler 18x9.5 ET45 w/ 285/35/18 (should I go with ET35 or ET45 here)

[alohasurftoad]

Originally Posted by mclovin69x

Before I pull the trigger, will this work alohasurftoad :
Front: Bayern Antler 18x9.5 ET35 w/ 255/40/18
Rear : Bayern Antler 18x9.5 ET45 w/ 285/35/18 (should I go with ET35 or ET45 here)

with the 18x9.5 ET35 up front, the inside lip will be millimeters from the strut, however will not rub. since 255 is slightly stretched on 9.5 it will not rub as well. here, is 19x9.5 ET35 with 255/35/19(same 3-D foot print) for reference.
https://f30.bimmerpost.com/forums/sh...8&postcount=16

with 285/35/18 rear, you need ET45. ET35 will stick out too much

[mclovin69x]

Originally Posted by alohasurftoad

with the 18x9.5 ET35 up front, the inside lip will be millimeters from the strut, however will not rub. since 255 is slightly stretched on 9.5 it will not rub as well.

would it be more suitable if I go with a 18x8.5 ET35 Antler in the front? Would this increase the clearance with the strut?