[M-2'ned]

I love the stock 930M wheels up until it's time to wash them. I spent a few hours last washing cleaning them in great detail then applying ceramic coating, but still the breakdust is unbearable (as are the squeel of my brakes). After washing the car again yesterday, I'm contemplating two upgrades.

First - brake pads. Do I really need to spend $1k on PSI pads to keep my performance while ridding them of the dust?

Second - the wheels. I wouldn't mind selling these for wheels that are easier to clean, moving to a forged wheel, preferably something I can rotate, especially if the cost was bearable.

With 20's all around, it seems like the builders are still going with a staggered setup (9" width up front and a 10" in back or so). I guess a car of this caliber is designed for a staggered setup and I should just expect to buy more tires?

I was thinking of the AST lowering springs (because they aren't yellow and retain the stock electronic adjustability).

[M-2'ned]

Also, MSRP on the stock wheels is $ 3,558.00 with $39 shipping. I wonder what they are worth with 1600 miles on them?

[JustinHEMI]

No I wouldn't spend 1k on psi pads. There's less expensive and proven options. I sold my OEM wheels for 1400.

[M-2'ned]

Less expensive options? So far I've only seen EBC and PSI on the M-2... I guess I should be looking at the M-3/M-4 options people like? What options is everyone aware of?

[M-2'ned]

Originally Posted by JustinHEMI

No I wouldn't spend 1k on psi pads. There's less expensive and proven options. I sold my OEM wheels for 1400.

Wheels only, no tires? I'm seeing some on fleaBay for $3k.

[M-2'ned]

Uhg, thought I posted this in the wheel forum. Sorry everyone. Moderators, please feel free to move this.

[JustinHEMI]

Originally Posted by M-2'ned

Less expensive options? So far I've only seen EBC and PSI on the M-2... I guess I should be looking at the M-3/M-4 options people like? What options is everyone aware of?

There's a whole forum for brakes and wheels and such. In it are some threads, including a much less expensive and good option I went with, here,


https://g87.bimmerpost.com/forums/sh....php?t=2020014

Other options discussed here, including Isweep which are also much less expensive than PSI. G80/82 pads will fit G87, don't worry about finding G87 specific pads. One of the benefits of a global platform.

https://g87.bimmerpost.com/forums/sh....php?t=2007809

Originally Posted by M-2'ned

Wheels only, no tires? I'm seeing some on fleaBay for $3k.

Wheels only. 3K is crazy for these things, they'll never get it.

[KC87ZB]

Originally Posted by JustinHEMI

Wheels only. 3K is crazy for these things, they'll never get it.

Dropping 3k on stock cast wheels would be insane.

Never trust eBay listings, that’s no indication of sales price

[M2siast]

Plus, eBay fees and shipping will allow the seller to keep half of it…

[m20e3087]

Any pads from M3/4 G8X will fit.

[GregW / Oregon]

Originally Posted by M-2'ned

First - brake pads. Do I really need to spend $1k on PSI pads to keep my performance while ridding them of the dust?

Most brake dust comes from the rotors, not the pads. Wish BMW had Porsche's PSCB technology. https://www.youtube.com/watch?v=ZCj83_uF9dE

[TopherHax]

Originally Posted by GregW / Oregon

Most brake dust comes from the rotors, not the pads. Wish BMW had Porsche's PSCB technology. https://www.youtube.com/watch?v=ZCj83_uF9dE

That's interesting, I thought it'd be the opposite... Do you have any source of that info?

[JustinHEMI]

No, that's bullshit.

[GregW / Oregon]

Originally Posted by TopherHax

That's interesting, I thought it'd be the opposite... Do you have any source of that info?

It's the concept that Porsche uses for it's Surface Coated Brake technology. By coating the rotor with tungsten carbide, dust is reduced 90%, allowing them to pair it with a white caliper that stays clean. A small amount of the reduction is different pads, but it's mostly the rotors. https://www.porsche.com/internationa...iew/article03/

See the attached from Car and Driver which specifically cites the rotors as the source for most brake dust.

[JustinHEMI]

Originally Posted by GregW / Oregon

It's the concept that Porsche uses for it's Surface Coated Brake technology. By coating the rotor with tungsten carbide, dust is reduced 90%, allowing them to pair it with a white caliper that stays clean. A small amount of the reduction is different pads, but it's mostly the rotors. https://www.porsche.com/internationa...iew/article03/

See the attached from Car and Driver which specifically cites the rotors as the source for most brake dust.

That article is mistaken.

[GregW / Oregon]

Originally Posted by JustinHEMI

That article is mistaken.

And Porsche is mistaken? Use common sense. I just replaced the original brakes on my F82 at 51k miles. Looking at one brake, the swept area of a rotor is in approximately 115 sq in x 2 sides = 230 sq in. The area of a brake pad is about 10 sq in x 2 = 20 sq in. My rotors were worn down about .09", the pads about .28". So the volume of material shed was about 21 cu in from the rotors and 6 cu in from the pads. So, where do you think most of the brake dust comes from? If you have contradictory information post your source.

[bernard1414]

I am running EBC Red-stuff and it's been great in terms of reducing brake dust and noise. Dont get me wrong, the dust is still there, but much less of it and a lighter color (OEM dust was brownish, EBC is greyish)

[JustinHEMI]

Originally Posted by GregW / Oregon

And Porsche is mistaken? Use common sense. I just replaced the original brakes on my F82 at 51k miles. Looking at one brake, the swept area of a rotor is in approximately 115 sq in x 2 sides = 230 sq in. The area of a brake pad is about 10 sq in x 2 = 20 sq in. My rotors were worn down about .09", the pads about .28". So the volume of material shed was about 21 cu in from the rotors and 6 cu in from the pads. So, where do you think most of the brake dust comes from? If you have contradictory information post your source.

No, I'll take your word for it.