[aerobod]

Originally Posted by M Division

Interesting this would push the front end Scrub Radius on the M2 outwards compared to 240i but I assume the rear SR would remain roughly the same. In terms of the front end this would explain some increase in front end performance, enhanced feel, better dynamic toe angle during braking and acceleration.


The G series M4;-

Front track 1617mm
Front wheels 9.5Jx19 ET20 with 275/35-19 tyres
Rear track 1605mm
Rear wheels 10.5Jx20 ET20 with 285/30-20 tyres
M4 car width without mirrors: 1887mm
M3 Car width without mirrors 1903mm

So safe to assume the M2 uses a ET20 to match that used of the M4, same track and body widths.

Yes, M2 should match M4.

The only difference in platform dimensions from the M240i to the M2 and M4 is that the front hubs will be about 10mm further out due to 1 degree or so extra negative camber from longer suspension lower links on the M2/M4. The rear hubs will be very close to the same position and may use the same link dimensions between the same cars, although in the past eccentric bolts have been used for rear camber adjustment, which can vary the hub position by a few millimetres, depending on the camber set.

[M Division]

Originally Posted by aerobod

Yes, M2 should match M4.

The only difference in platform dimensions from the M240i to the M2 and M4 is that the front hubs will be about 10mm further out due to 1 degree or so extra negative camber from longer suspension lower links on the M2/M4. The rear hubs will be very close to the same position and may use the same link dimensions between the same cars, although in the past eccentric bolts have been used for rear camber adjustment, which can vary the hub position by a few millimetres, depending on the camber set.

Interesting, that makes sense. The front hubs sitting +10mm toward the fender with a longer lower suspension link should also increase the top of the wheel strut clearance slightly, maybe ~4mm due to increased angle on the strut tower. The G42 strut sits quite close to the top of the wheel on the front end (more clearance is available on the rear between strut and top of wheel).


Also safe to assume the Catalytic converters and even cross pipe will be identical across the G80/G82 and G87, but likely the mid-pipe and rear box will be custom to the G87 to accomodate the shorter wheelbase and tweaked exhaust sound design. Got to love the shared design and components of the CLAR.

[M2PDX]

Originally Posted by VIERsr

You cannot fit the 963s from the G8x on your F87 because the new platform has a 5x112 bolt pattern, whereas yours is 5x120. Perhaps you are referring to the 763s?

Yes, correct, 763s.

[GregW / Oregon]

Originally Posted by Game

We have to expect it. This car is 10k cheaper than the G80...the price cut isn't coming from the kindess of their hearts.

Almost $15k compared to comparable G82.

Side note, a set of 826M wheels will cost you around $3500 from your parts store. I see GetBMWParts has them cheaper.

Haven’t looked, but it should be easy to find G80/82 takeoffs for sale.

[zero21]

Originally Posted by StickyPickle

These are the weights for the 826m which is the same wheel but forged so I’m willing to bet the 930 will be north of 30lbs

826M
9.5x19 ET20: 10.8 kg / 23.8 lbs
10.5x20 ET20: 11.5 kg / 25.4 lbs

The 930M's are a cast version of the 825M's

[Ghostrider.1127]

some infos here:

https://www.bmw-m.com/en/topics/maga...ms-wheels.html

[StickyPickle]

Originally Posted by zero21

The 930M's are a cast version of the 825M's

Oops, you are correct! Meant to type 825

[///MeraldCity_G82]

Any Seattle people willing to try on these wheels to see fitment for aftermarket once their car gets in? They are off my G80, I am considering getting an M@

https://g80.bimmerpost.com/forums/sh....php?t=1989412

[Ghostrider.1127]

Originally Posted by ///MeraldCity_G82

Any Seattle people willing to try on these wheels to see fitment for aftermarket once their car gets in? They are off my G80, I am considering getting an M@

https://g80.bimmerpost.com/forums/sh....php?t=1989412

oem are all ET20

[Tag]

swagon

Confirmation on the 930M wheels being cast.

Start watching @16m

[swagon]

Originally Posted by Tag

swagon

Confirmation on the 930M wheels being cast.

Start watching @16m

well, there was no doubt since the friend of my cleaning lady knows one of the two sitting there

911 992 carrera comes with cast wheels so i think we have been spoiled by lightweight F8x & G8x bmw rims for the last few years, though it's indeed still stupid to give the m2 a boat anchor of a wheel.

although, it's in line with the rest of cost-cutting measures in the weight department.

[DailyDownshift]

Originally Posted by Tag

What's your source for them not being fully forged? Here's a direct quote from BMW M where they say they are forged wheels, not flow-formed.



Source: WHEEL DESIGN. Episode 04: BMW M3 & M4 Explained.

No need for a source, anyone who knows a lot about wheels can tell you that BMW wheels, including both sets of the F87 wheels were flow-formed, or as some wheel manufacturers like to call, flow-forged. BS marketing term, definitely not "fully forged". There is a HUGE money and weight difference between flow formed/flow forged, and fully forged.

[zero21]

Originally Posted by Daily Downshift

Yes, you should budget for another set of wheels. The "good" wheels that BMW sells are flow formed wheels and they're between 23-26lbs per wheel. The G87 seems to have cast wheels, which will put them between 29-34lbs per wheel. Spend $4250+ on fully forged wheels to get into the 18-21lbs range and you'll feel like you're driving a completely new car. That's my plan at least.

I'm pretty sure the forged wheelsets are fully forged, not "flow-formed".

[VIERsr]

Considering the price and the weight, they cannot be (fully) forged.

[zero21]

Originally Posted by VIERsr

Considering the price and the weight, they cannot be (fully) forged.

MSRP's on the wheels from BMW rival those that are sold by vendors who participate in these forums. That's probably not the greatest metric to judge them by unless we're talking half or lower for pricing.

[M_Power Rob]

Originally Posted by zero21

MSRP's on the wheels from BMW rival those that are sold by vendors who participate in these forums. That's probably not the greatest metric to judge them by unless we're talking half or lower for pricing.

I am not stating they are hybrid forged/flow forged or fully firged but you do realize like with almost anything, you are paying a premium price for the product by buying them (the rims) from BMW.

[VIERsr]

Originally Posted by zero21

MSRP's on the wheels from BMW rival those that are sold by vendors who participate in these forums. That's probably not the greatest metric to judge them by unless we're talking half or lower for pricing.

A fully forged 19/20" rim weighs much less than 10kg/22lbs, that's the weight of flow formed wheels.
Here you can get an idea of how much a forged or flow formed wheel weighs https://www.apexraceparts.com/our-wh...l-designs.html

[zero21]

Originally Posted by VIERsr

A fully forged 19/20" rim weighs much less than 10kg/22lbs, that's the weight of flow formed wheels.
Here you can get an idea of how much a forged or flow formed wheel weighs https://www.apexraceparts.com/our-wh...l-designs.html

I don't want to be critical but you're simplifying this issue beyond belief. There are tons of first class forged wheels that weigh much more than that strictly due to design and load requirements.

Please stop breaking it down by price.

[VIERsr]

Originally Posted by zero21

I don't want to be critical but you're simplifying this issue beyond belief. There are tons of first class forged wheels that weigh much more than that strictly due to design and load requirements.

Please stop breaking it down by price.

Please share some of those tons of 19" first class fully forged rims weighing 10/11kg, we are all very curious
For instance a BBS FI-R in 9,5 x 19” weighs 7.8 kg.

[zero21]

Originally Posted by VIERsr

Please share some of those tons of 19" first class fully forged rims weighing 10/11kg, we are all very curious
For instance a BBS FI-R in 9,5 x 19” weighs 7.8 kg.

If you're not able to use the internet it's not my job to teach you

You picked one BBS wheel, and it happened to be released recently. What do the rest weigh?

Not to mention to you originally spoke about 3k wheels and then immediately jumped to a 10k plus set from BBS. Your pricing arguments are bizarre when that's the jump you make. And it only illustrates my point that pricing doesn't necessarily matter.

[DailyDownshift]

Originally Posted by zero21

If you're not able to use the internet it's not my job to teach you

You picked one BBS wheel, and it happened to be released recently. What do the rest weigh?

Not to mention to you originally spoke about 3k wheels and then immediately jumped to a 10k plus set from BBS. Your pricing arguments are bizarre when that's the jump you make. And it only illustrates my point that pricing doesn't necessarily matter.

Your argument is hurting my brain, you couldn't be more incorrect here man. Please do some research on fully forged wheels vs what manufacturers call "forged" or more correctly named, flow formed. FULLY forged is a completely different ball park when it comes to weight and pricing.

[BimmerFix]

Originally Posted by VIERsr

Considering the price and the weight, they cannot be (fully) forged.

& Daily Downshift

Please stop spreading mis information …
They ARE fully forged