[BroDoze]

Prepare to have your minds blown:

Where do you think the material from the rotors goes when they wear? The air.
Where do you think the material from the pads goes when they wear? The air.
Where do you think this nasty hot, gassy air goes? Wherever it can.


Mystery solved.

[Jaguar]

Originally Posted by BroDoze

Prepare to have your minds blown:

Where do you think the material from the rotors goes when they wear? The air.
Where do you think the material from the pads goes when they wear? The air.
Where do you think this nasty hot, gassy air goes? Wherever it can.


Mystery solved.

Whatever the case, after I switched pads to isweep, 90% of the dust issue is GONE, and I’m still using my stock rotors.

[JABCAT]

Originally Posted by Kevin_The_Clean1

I don't think most break dust comes from the rotors. Unless they're really soft units & made from fairly week steal. Some cars go 60-70k + before the rotors ever need servicing / down to minimum thickness for replacement. But there's no way the pads will last that long (depending on how you drive). There's ton's more pad material loss there than ever is rotor material degradation.

Exactly, the "dust" all over the wheels is from the brake pads. I'm honestly confused by those who think it's from iron rotors.

[M2 CCO]

Originally Posted by MineralGreyMetallic

Curious why people have chosen to go with iSweep1500 over 2000. As far as I understand the 2000 is better suited for "spirited driving." I'm assuming that means potential for more noise and dust however.

I went with the 2000s and I love them. Dust is still better than OEM but for me the squealing was the most important thing I wanted fixed. Bite is great!

[M2 CCO]

Originally Posted by nosbocaj

Dealer won't do it. Indy shop will charge you $150-300 depending on how quick they are.

I'm not a mechanic by any means, but I was able to do them in about an hour. SUPER easy install.

I had my dealer do it at my break in service. No issues.

[Legit]

Originally Posted by M2 CCO

I had my dealer do it at my break in service. No issues.

How much did they charge out of curiosity? I can imagine BMW is double the price of independent shop but I understand the piece of mind of BMW doing it.

[M2 CCO]

Originally Posted by Legit

How much did they charge out of curiosity? I can imagine BMW is double the price of independent shop but I understand the piece of mind of BMW doing it.

Can’t recall exactly but it was $250-300 I believe, which was actually less than I had been quoted from some reputable Indy shops.

[nosbocaj]

Originally Posted by M2 CCO

I had my dealer do it at my break in service. No issues.

Nice! Guess I should have said most dealerships won't do it. I know there are some out there that are pretty mod friendly.

[BroDoze]

My dealer will mod the car up to and including voiding the warranty. They'll definitely put aftermarket pads on.

[NoMoreVW]

Originally Posted by ScottyRyan2019

I guess it depends on the dealer. I spoke to my service writer today and he said we'll put anything on you like. Shop rate is $250 an hour. 🤓

Yeah. Apparently the two dealers in town went up $50 an hour pretty recently.

I’ll probably do this and my aftermarket stuff at Eurocharged. Only $180 an hour there.

[Kevin_The_Clean1]

Originally Posted by BroDoze

Prepare to have your minds blown:

Where do you think the material from the rotors goes when they wear? The air.
Where do you think the material from the pads goes when they wear? The air.
Where do you think this nasty hot, gassy air goes? Wherever it can.


Mystery solved.

Be fully prepare to have a direct counter comment delivered too. Those are some great words & you may be a clever wordsmith. BUT, you never mentioned what percentage of the dust comes from what components. So technically, you're still wrong my BMW compadre. Substantially more dust originates from the pads. The pads will alway be softer than the steel discs / rotors ever will be. Just a fact of life.

"Most of the dust is coming from the rotors... " they say. That's no the way it works here fellas...

[BroDoze]

Originally Posted by Kevin_The_Clean1

Be fully prepare to have a direct counter comment delivered too. Those are some great words & you may be a clever wordsmith. BUT, you never mentioned what percentage of the dust comes from what components. So technically, you're still wrong my BMW compadre. Substantially more dust originates from the pads. The pads will alway be softer than the steel discs / rotors ever will be. Just a fact of life.

"Most of the dust is coming from the rotors... " they say. That's no the way it works here fellas...

Not wrong.
Everything in my post is true.
Nothing in the post is false.

[Carefree]

Originally Posted by Kevin_The_Clean1

Be fully prepare to have a direct counter comment delivered too. Those are some great words & you may be a clever wordsmith. BUT, you never mentioned what percentage of the dust comes from what components. So technically, you're still wrong my BMW compadre. Substantially more dust originates from the pads. The pads will alway be softer than the steel discs / rotors ever will be. Just a fact of life.

"Most of the dust is coming from the rotors... " they say. That's no the way it works here fellas...

Wordsmith, perhaps.
Clever, nope.

[MineralGreyMetallic]

My road bike, which also uses disc rotors, is covered in similar brown dust around the brakes after just one ride.

I have to swap those tiny pads out every 1-2 months, depending on how much I ride and descend. There is maybe 2mm of pad material not including the backing plate.

For reference, the rotor when new is about 2mm in thickness also. They recommend replacing it when it reaches 1.5mm.

If the theory that "most dust comes from the rotor" was correct I'd be replacing rotors every 1-2 months and not just pads.

After a solid year of ~15-17 hours a week of riding, the rotor is still thicker than 1.5mm and does not need to be replaced.

I know it's not an apples to apples comparison, but you get the idea.

[BroDoze]

Back to these pads, is the consensus that the 1500s give up a slight bit of initial bite, but dust the least? And the 2000s have the same or better initial bite, dust less than stock, but dust more than the 1500s?
That initial bite performance is really important to me.
I wonder if I should forget the 1500s and get the 2000s instead.

Are there any performance downsides to the 2000s for street use?

[JABCAT]

Originally Posted by BroDoze

Back to these pads, is the consensus that the 1500s give up a slight bit of initial bite, but dust the least? And the 2000s have the same or better initial bite, dust less than stock, but dust more than the 1500s?
That initial bite performance is really important to me.
I wonder if I should forget the 1500s and get the 2000s instead.

Are there any performance downsides to the 2000s for street use?

I've stated previously, and believe to be true, that there is no noticeable difference between the 1500s & oem pads in initial bite or overall performance. I have them on 2 vehicles, '22 X3MC & my '23 M2. Combined over 17k mi on the pads (10k on the X3 & 7k on my M2).

[Carefree]

Originally Posted by JABCAT

I've stated previously, and believe to be true, that there is no noticeable difference between the 1500s & oem pads in initial bite or overall performance. I have them on 2 vehicles, '22 X3MC & my '23 M2. Combined over 17k mi on the pads (10k on the X3 & 7k on my M2).

This ^

[fangelov]

Originally Posted by MineralGreyMetallic

My road bike, which also uses disc rotors, is covered in similar brown dust around the brakes after just one ride.

I have to swap those tiny pads out every 1-2 months, depending on how much I ride and descend. There is maybe 2mm of pad material not including the backing plate.

For reference, the rotor when new is about 2mm in thickness also. They recommend replacing it when it reaches 1.5mm.

If the theory that "most dust comes from the rotor" was correct I'd be replacing rotors every 1-2 months and not just pads.

After a solid year of ~15-17 hours a week of riding, the rotor is still thicker than 1.5mm and does not need to be replaced.

I know it's not an apples to apples comparison, but you get the idea.

You have to keep in mind that the surface area of the rotor subjected to wear is many times larger than the surface area of the pads, so the wear will never be 1:1. We all know that the rotors usually last several pad sets before needing replacement, but do eventually wear down. So the simple answer is that the dust on the wheels is from both the pads and the rotors, the ratio depends on materials, temperature and surface areas. If changing to a diffent pad reduces the visible dust on the wheels without loss of performance, then go for it. :-)

[chris719]

Originally Posted by JABCAT

Exactly, the "dust" all over the wheels is from the brake pads. I'm honestly confused by those who think it's from iron rotors.

Because some people can do basic math and see that 1 mm off the rotors is a lot more material than 1 mm off the pads. How dusty the pads are is not coincidentally proportional to bite. The ratio varies but clearly the rotor is a large contributor, especially if you consider CCB and PSCB brakes where the rotor is extremely hard and does not wear much yet the pads are not that far off normal brake pads and there is almost zero dust.

[Carefree]

I’m not experienced/smart enough to understand all the interactions regarding rotor/pad hardness, composition, surface area, etc. outlined by Chris.

Quite frankly, it really doesn’t matter to me so long as my G87 brakes well and I’m not cleaning wheels every 3 days.

The pad switch was a good decision for this owner.

YMMV

[ScottyRyan2019]

Man just looking at most brake pads and understanding their makeup will lead one to understand most of the dust is coming from them.

[MineralGreyMetallic]

Can't decide between 1500 and 2000!