[Dinosoar]

Okay, I know many are like "whaaaat"? there are no wheels known to fit the G42 yet. This is true.

However, this thread is clearly coming, and I've been doing my homework. I should know soon if my calculations and interpolations are accurate.

I take delivery of a G42 in a week or sooner. It's a 230i M Sport/Handling Package (only) car. I have purchased wheels and tires from TireRack that fit a G20. I know my wheel size and ET of the new wheels, and worked to match the wheel size and ET of the M240s Pro Pack wheels.

The OE wheels are 19x8.5 ET25 up front. I am doing a square set up, so I focused on this axle only. The aftermarket wheels are 19x8.5 with an ET of 30. From all the videos I saw, I think I have 5mm of room for an outward moving wheel...we'll see soon. My goal has been as much handling grip as possible. Engine horsepower is great, but "horsepower" for the turns is more usable on the street, IMO.

Tire is also an upgrade size. That same OE wheel above is wrapped in 245/35-19...However, I am using 255/35-19 Michelin PSS (PS4 are out of stock). This new size tire is slight smaller in diameter than the OE front tires coming on my car now (225/40-19), and of course wider.

I know I'm pushing limits and using educated guesses, but if they fit, I'll post pix...on the understanding that wheel "poke" is a subjective thing, but clearance is not. Of course, I'll be selling the wheels coming off the car on eBay. eBay prices now are well above what I'm paying for the new set too!

If the new wheels don't fit, I'll need this thread over the coming weeks/months!

[Hpirx]

Love it! A true pioneer!
Yes, proper wheel options are so important, especially for a high horsepower sports car like this.
I've ordered the HP wheel/cooling package and will need a winter wheelset ASAP for the US Northeast where I'm located.
I will try to do some independent research too, and add to the knowledge as well.
I think tire options are fairly well covered. It would be great to figure out which wheel manufacturers would fit. I was very happy with my Apex wheels for my E90, and was able to transfer them to my F22. I don't know if Apex makes wheels for the G generation though. I know the G42 is based on the same platform as the G 3/4 series, but I'm a little leery of assuming it's the exact same specs! We're in this together to figure out as first adopters.

[atenzany62]

I'm thinking about mounting the 437m wheels from an m2 with the 245 and 265 width tire set up

[Dinosoar]

Originally Posted by atenzany62

I'm thinking about mounting the 437m wheels from an m2 with the 245 and 265 width tire set up

That'll look awesome. Is the hub the same? I think the G42 has the same hub as the G20...different than the last gen 2 Series.

Post pix when done...even if they don't look right; include dimensions including ET.

[gp_solo2]

Originally Posted by atenzany62

I'm thinking about mounting the 437m wheels from an m2 with the 245 and 265 width tire set up

Won't work…not the same bolt pattern. M pro package is closest fit to M2 size…245 front and 255 rear.

[CDN-Driver]

Good Resources:

https://www.wheel-size.com


https://www.1010tires.com/Tools/Wheel-Offset-Calculator

[Dinosoar]

Well, it appears a 255 square set up is good-to-go for the G42.

I just fitted 255/35-19 (Michelin PSS) on 19x8.5 wheels with an ET of 30 (OZ Superturismo LM) on all four corners to my brand new 230i, M Sport (yes, with the M Sport brakes).

I pulled off 791M Double-spoked black wheels off. Those fronts are 225/40s, so I was pretty concerned about the much larger size. (They'll be on eBay very soon)

I still need to drive it hard, but I did full lock, and jacked up the opposite corners and saw no contact, nor any "near misses."

The wheels push out more, even more than the rears which are the same size tire and wheel. I am very particular about where the wheel lines up with the body...I hate it when it looks sucked in the fender, and hate it "poking" beyond the fenders. These are near-perfect...I'd prefer a few mm inward on the rear, but they appear to clear the fender well. Fronts look perfect to me. Of course, style, wheel type, stance are all subjective. Rubbing and contact are not subjective and I think this setup is good to go regarding that.

In the fourth pic, the rears sit outward more than the fronts. Seems like there may be more room to push the fronts out, but not the back. Rears seem at max outward orientation. The big questions some may have is 9" wide wheels. ET will really matter there. I think the right ET will allow a 9" wheel up front with possible 265 fitment, but I'm not willing to buy-n-try. For now, my 255s will meet my needs.

UPDATE: I weighed each wheel. My new wheel tipped the scale at 50.1 lbs. The 791M front was 50.2 lbs (yet so much smaller!), and the 791M rear was 52.6lbs. Not much of a savings in weight as I was hoping, but they numbers are what they are, and I'm glad I did not add weight.

[Hpirx]

Nice! Let's see some photos soon.

[Dinosoar]

Originally Posted by Hpirx

Nice! Let's see some photos soon.

I uploaded a few...delayed posting, I guess.

User error, posted now.

[dszpiro]

Originally Posted by Dinosoar

I just fitted 255/35-19 (Michelin PSS) on 19x8.5 wheels with an ET of 30 (OZ Superturismo LM) on all four corners to my brand new 230i, M Sport (yes, with the M Sport brakes).

It is nice to read that ET30 fits all around. Can you confirm if the stud pattern for the G42 is 5x112?

[Dinosoar]

Originally Posted by dszpiro

It is nice to read that ET30 fits all around. Can you confirm if the stud pattern for the G42 is 5x112?

Yes it is. I ordered this from TireRack as if it was a 2022 330i. Those hub patterns are in fact 5x112 according to my order sheet, and product page, on this wheel.

[Hpirx]

Sharp looking car! Congratulations.
I had 255's square on my 2019 240 for summer, although they were 17". A little poke, but I was alright with it. It really improved the stability of the car over the stock RFTs. I only had slight rub on high speed compression dips, mostly a great ride.
I've ordered the HP 245/255 setup and will need a set of dedicated winter wheels. Your research and purchase has really helped in my decision process, thanks again!
Now I just have to wait for delivery. Stuck in "assembly in progress " forever!

[dszpiro]

Originally Posted by Hpirx

I've ordered the HP 245/255 setup and will need a set of dedicated winter wheels.

I am in exactly the same position. I ordered the car with the 893M HP wheel package and now thinking about winters.

I was wondering what you're considering? I was thinking of getting 245/35 square rather than mimic the HP summer tires staggered pattern. I am also curious about the winter tire makes/models you're considering. I was looking at the Pirelli Sottozero 3.

[Good 4 2 reasons]

Originally Posted by dszpiro

I am in exactly the same position. I ordered the car with the 893M HP wheel package and now thinking about winters.

I was wondering what you're considering? I was thinking of getting 245/35 square rather than mimic the HP summer tires staggered pattern. I am also curious about the winter tire makes/models you're considering. I was looking at the Pirelli Sottozero 3.

That's what I put on mine, but I swapped the sizes like for like with what came from the factory (225/40/19 and 255/35/19)

[zipstic]

Originally Posted by Dinosoar

Well, it appears a 255 square set up is good-to-go for the G42.

I just fitted 255/35-19 (Michelin PSS) on 19x8.5 wheels with an ET of 30 (OZ Superturismo LM) on all four corners to my brand new 230i, M Sport (yes, with the M Sport brakes).

I pulled off 791M Double-spoked black wheels off. Those fronts are 225/40s, so I was pretty concerned about the much larger size. (They'll be on eBay very soon)

I still need to drive it hard, but I did full lock, and jacked up the opposite corners and saw no contact, nor any "near misses."

The wheels push out more, even more than the rears which are the same size tire and wheel. I am very particular about where the wheel lines up with the body...I hate it when it looks sucked in the fender, and hate it "poking" beyond the fenders. These are near-perfect...I'd prefer a few mm inward on the rear, but they appear to clear the fender well. Fronts look perfect to me. Of course, style, wheel type, stance are all subjective. Rubbing and contact are not subjective and I think this setup is good to go regarding that.

Glad you got a wheel/tire combo that you like and fits!

Based on your pictures it looks like 18's should clear the calipers for a winter setup. Tirerack shows 18's will fit on an M340 so long as you don't have the cooling and high performance tire package.

[Hpirx]

Originally Posted by dszpiro

I am in exactly the same position. I ordered the car with the 893M HP wheel package and now thinking about winters.

I was wondering what you're considering? I was thinking of getting 245/35 square rather than mimic the HP summer tires staggered pattern. I am also curious about the winter tire makes/models you're considering. I was looking at the Pirelli Sottozero 3.

Definitely not doing staggered. I'm considering 235 square, as I have been told narrower is preferable for snows to cut through the crud.
245's would certainly work a nd drive well under normal conditions.

Yes I'm considering the Sottozero's too.
I'm also looking at the Bridgestone Blizzak LM series. They are the performance snows rather than the studless heavier WS series. I had some on a previous 335 xdrive, and they drove well in most conditions. I guess it might come down to availability and price for the final decision on all this. Performance difference will probably be minimal.

[dszpiro]

Originally Posted by Hpirx

Definitely not doing staggered. I'm considering 235 square, as I have been told narrower is preferable for snows to cut through the crud. 245's would certainly work and drive well under normal conditions.

In the past I have usually opted for a slightly narrower winter tire. The 235 choice is worth considering. I have put the question to my BMW dealer and I'll share the recommendation I get back.

I have a set of winter tires/wheels from my 2019 M550iX that have 245/40/R19 Pirelli Sottozero 3 tires on 8Jx19 IS30 5x112 BMW wheels (they look like the 633 model but are finished in black). I think the 40-series profile of the tires make them too big to move to the M240iX, but I think the wheels should be a fine match. Do you agree? Thanks.

[Dinosoar]

Originally Posted by Hpirx

Sharp looking car! Congratulations.
I had 255's square on my 2019 240 for summer, although they were 17". A little poke, but I was alright with it. It really improved the stability of the car over the stock RFTs. I only had slight rub on high speed compression dips, mostly a great ride.
I've ordered the HP 245/255 setup and will need a set of dedicated winter wheels. Your research and purchase has really helped in my decision process, thanks again!
Now I just have to wait for delivery. Stuck in "assembly in progress " forever!

I had my dealer research the specs on the 893M wheels since they were same size and on the front. ET on that OE wheel is 25. So, I deduced I'd be good with 30 after viewing many videos of that package wheel and it's alignment with the fender lip.

Glad it was helpful.

[dszpiro]

Originally Posted by Dinosoar

I pulled off 791M Double-spoked black wheels off.

If you have those wheels somewhere easy to access, could you read the offset number cast into the wheel? There is no information available about G42 wheel offset anywhere online that I can find, so it would be great to have that confirmed from a wheel that BMW put on a G42.

I have a set of BMW wheels that I used on my 2019 M550iX. They have the size and offset numbers cast into one of the arms and can be seen when looking at the back side of the wheel. I have attached a photo. The offset info is shown as "IS30".

Thanks!

[Dinosoar]

Here you go...

To add to the confusion on backspacing/ETs, the OE wheels noted here are 40ET in the back, but the O.Z.s I fit to the car are listed as 30ET, YET, the O.Z. wheels push out further. And, they're the same size wheel as the OE wheel (19x8.5).

My BMW Genius said it may be how the two manufactures measure the weel outer face or something. I got lucky, on fitment, I guess, and the point here is you never know fitment until you fit them on.

GL out there!

[dszpiro]

Originally Posted by Dinosoar

Here you go...

Thank you very much!

[VIERsr]

Well done, exactly the same specs as the G20/22 wheels, 8/8.5" et 27/40. The F22 had narrower and less deep rims (higher offsets) than the F30/32.