[ksa]

Hey guys, I am in the process of getting rid of my 2019 M850 Coupe and picking up a 2024 M3 Competition. I love the M850 but having that and a F Type R, I need to change one out for a 4 door vehicle and this makes most sense. What I am wondering is, I have an OEM set of 19" winter tires/wheels that I used on my M850 and I am wondering if that set will also work on the M3?

Thanks very much.

[Llarry]

Originally Posted by ksa

What I am wondering is, I have an OEM set of 19" winter tires/wheels that I used on my M850 and I am wondering if that set will also work on the M3?

There was a similar query back in mid-July on this very question, which I researched and responded to in some detail. The poster was TheDrivenGarage and the thread was titled "Will these fit?" My conclusion was that they would probably fit, but would look a bit odd.

[AhsanU]

Hard to say without knowing which wheels exactly.

Primary thing to look at is PCD (bolt pattern). The G8X uses 5x112. Then you need to look at the wheel width, then offset, in order to see if/how it'd fit.

[ksa]

Originally Posted by Llarry

There was a similar query back in mid-July on this very question, which I researched and responded to in some detail. The poster was TheDrivenGarage and the thread was titled "Will these fit?" My conclusion was that they would probably fit, but would look a bit odd.

That was my first guess as well. I figured they would fit but likely not look the best. I assume they will sit well inside the wheel well or something. Which I am thinking though might actually be a positive and save the body from shooting rocks from fatter tires. But regardless I imagine that issue would be fixable via spacers?

Thank you, I will search that previous thread as well.

[ksa]

Originally Posted by AhsanU

Hard to say without knowing which wheels exactly.

Primary thing to look at is PCD (bolt pattern). The G8X uses 5x112. Then you need to look at the wheel width, then offset, in order to see if/how it'd fit.

I am going to try and get the details on what wheels they are. If nothing else, will get pics so members can ID. Thanks.

[Llarry]

Originally Posted by ksa

I am going to try and get the details on what wheels they are. If nothing else, will get pics so members can ID. Thanks.

I suspect that they are BMW Style 786M wheels. Photo attached. 19 x 8J wheels with 30mm offset.

[ksa]

Originally Posted by Llarry

I suspect that they are BMW Style 786M wheels. Photo attached. 19 x 8J wheels with 30mm offset.

Here’s a pic of my m850 when I first got it and those wheels definitely look to be the ones. After speaking to my tire shop all they can suggest is to do a test fit to determine how big of spacers I will need. Will likely be doing that and going from there.

[forcefed]

Googling around the specs on 786m rims is as follows
19x8 +30 front https://www.willtheyfit.com/index.ph...h=8&offset2=30

19x9 +44 rear https://www.willtheyfit.com/index.ph...h=9&offset2=45

To get these to stick out like the stock wheels and clear the front calipers you'll 30mm spacers up front and 45mm in the back, probably better to go with adapters at this size rather than spacers.

I'm in a similar situation, my 19x8.5 wheels have a +25 offset and i'll need 18mm up front and 30mm in the back, we'll see how goofy they look once i put them on

[ksa]

Wow 30 mm and 45 mm seem like huge numbers. I’ve never ran spacers/adapters before but generally see measurements around 10-20 mm area. Would it be safe to have adapters/spacers that big?

[forcefed]

I've autocrossed with 25mm adapters before without issues for 10 years, you don't have to go with that size, just enough to clear the calipers in the front and enough for the back to not look goofy.

[ksa]

So had a test fit done at the shop and the front massive brake caliper isn't cleared comfortably by the wheel which is what would be fixed by spacers/adapters. However the shop guys suggested going against that as the tire on my m850 wheels are 245 40 19 and the suggested M3 sidewall is 30 and 35. They said they would be concerned about potential rubbing especially how close the 40 tire looked like to the components in the front after a test fit.

Anyway I've dropped the idea and will list the set on local classifieds and hopefully it sells. Will throw it on for something cheap like $2K Canadian. I am going to order an aftermarket set of 19 x 9.5 square set up wheels and put 275/35/19 winter tires on all wheels.

[forcefed]

Originally Posted by ksa

However the shop guys suggested going against that as the tire on my m850 wheels are 245 40 19 and the suggested M3 sidewall is 30 and 35. They said they would be concerned about potential rubbing especially how close the 40 tire looked like to the components in the front after a test fit.

Ummm what? Those tires are the same height as the stock 275/35/19's, that shop is pretty clueless, but the offset is pretty bad on those so just sell them.

[ksa]

Originally Posted by forcefed

Ummm what? Those tires are the same height as the stock 275/35/19's, that shop is pretty clueless, but the offset is pretty bad on those so just sell them.

Oh really? lol. Oh well, I already ordered a set of 19x9.5 wheels with 275/35/19 winter tires. Now let’s see how long I sit on the oem set taking place in the garage before it sells.

[ksa]

Originally Posted by forcefed

Ummm what? Those tires are the same height as the stock 275/35/19's, that shop is pretty clueless, but the offset is pretty bad on those so just sell them.

New twist. The wheels I had ordered were some relatively cheap Braelin brand and today the site people emailed me stating the below.
I am not sure what that means and if I should still go with them or not. They offered two alternatives both of them are 19x9 and not 19x9.5 like the ones I had ordered.

“Upon reviewing your order, we became aware that the wheels you have selected are not compatible with your vehicle.
After checking with the manufacturer, they do not offer this wheel for your vehicle. The wheels do not pass the Y factor.”

[forcefed]

Originally Posted by ksa

New twist. The wheels I had ordered were some relatively cheap Braelin brand and today the site people emailed me stating the below.
I am not sure what that means and if I should still go with them or not. They offered two alternatives both of them are 19x9 and not 19x9.5 like the ones I had ordered.

“Upon reviewing your order, we became aware that the wheels you have selected are not compatible with your vehicle.
After checking with the manufacturer, they do not offer this wheel for your vehicle. The wheels do not pass the Y factor.”

What's the offset?

[ksa]

Originally Posted by forcefed

What's the offset?

19" x 9.5", 25 Offset, 5x112 (Bolt Pattern), 66.5mm HUB

[forcefed]

Originally Posted by ksa

19" x 9.5", 25 Offset, 5x112 (Bolt Pattern), 66.5mm HUB

Not 9"? Anyway 25 offset will work with either rims, rears will sit a bit inside but still ok.

[ksa]

Originally Posted by forcefed

Not 9"? Anyway 25 offset will work with either rims, rears will sit a bit inside but still ok.

No the ones I ordered are definitely 9.5. I just don't understand what they meant by 'not passing the Y factor'.

The two options they are giving me instead are following size;

19 x 9 with 38 offset

and 19 x 9 with 30 offset.

I could opt for one of those two if they would somehow work better for my needs?

I don't mind the tire sitting inside a little as I think it should for winter and it will shoot less rocks at the back but I don't want it looking funny or too skinny either.

Thanks a lot.

[forcefed]

The 30 offset rims will sit 16mm deeper in the front and 29mm deeper in the back, if you get some 12mm spacers for front and 15mm for the back it'll look better and you can use them for the stock rims in the summer if you want.
Skip the 38 offset rims.

[ksa]

Originally Posted by forcefed

The 30 offset rims will sit 16mm deeper in the front and 29mm deeper in the back, if you get some 12mm spacers for front and 15mm for the back it'll look better and you can use them for the stock rims in the summer if you want.
Skip the 38 offset rims.

Wait are you saying going the 9 and 30 offset is a better choice than the first one which is 9.5 and 25 offset?

Any idea on what they meant by the y factor thing?

[forcefed]

No the 9.5" 25 offset is better, no idea on y factor thing.

[ksa]

Originally Posted by forcefed

No the 9.5" 25 offset is better, no idea on y factor thing.

I emailed them asking what it is. I’ll do some googling too. If they are the best size without spacers then I rather go with that ideally.