Dust on rims

[HughJazzol]

Hello
My 2 month-old mme constantly has a lot of dust on the rims. I assume it to be brake dust, and I ask if it's normal? I washed it a week ago, and this morning they're dirty again.

Thanks

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[AliRafiee]

Not normal since most of your baking is with regen rather than pads

 

[Maui]

Are you using 1 pedal ?

 

[HughJazzol]

Are you using 1 pedal ?

Indubitably

 

[load97]

I do 1 pedal, and see brake dust/crud on mine it seems after a week or so (haven't measured how long it takes exactly). Does seem like it should take longer to accumulate, but maybe I'm hitting the brakes more than I think. But with aftermarket rims, it definitely seems to appear more to me than it did with stock wheels.

 

[EasyPass]

Even 1PD will actuate the manual brake system as there is a blended force of both regen and pad friction, so no avoiding some dusting. An excessive amount of that might be another problem, however.

 

[OH2AZ2OH]

1 pedal makes no difference in friction brake use on the MME. The MME uses hybrid braking, and will always start with regen and add friction braking as needed even if you press the brake pedal. This is unlike Teslas, but similar to I think every other EV. And, Tesla is changing to this style of braking in future models.

Since there isn't a lot of friction braking used, the rotors tend to often get an oxidation build up. That oxidation rubs off when the friction brakes do get used (heavy braking, or any braking less the 5mph, or any braking done while the car is in N), leaving a nice rust colored deposit on the rims.

My MME seemed to have a lot of brake dust for the first few months. After that, it seems to be not much different than other vehicles I have owned. There was some speculation that different drive modes were better/worse, but no one had a great explanation of why. Whisper seemed to be the consensus for the worst offender.

 

[N1naz]

This brings up an interesting problem. Since regen braking lightly uses the friction brakes, this can cause the brake rotors to rust and pit/score them, especially the rears. So, occasionally (on a downhill slope or exit ramp off the highway) put MME in neutral and use friction braking. Putting in neutral will disengage the regen and fully use manual brakes.

George

 

[HughJazzol]

Thank you Dave (@EasyPass ), George (@N1naz ), and OH (@OH2AZ2OH )

for the valuable insight. I guess that I will have to have a can of brake cleaner handy to spray the rotors and rims occasionally.

 

[RickMachE]

Not normal since most of your baking is with regen rather than pads

OP said nothing of baking, so why bring it into this? Totally off subject.

Wait, wut? He meant BRAKING?

 

[HughJazzol]

Yes, Rick, I don't bake. Ever.
I get baked and own baking soda for my pool, but I don't bake or regen while not doing it.

 

[AliRafiee]

OP said nothing of baking, so why bring it into this? Totally off subject.

Wait, wut? He meant BRAKING?

Wait, I thought we were talking about barking.

 

[garyc]

The real reason is Motorcraft pads
Switch to Raybestos ceramic pads
And poof begone. No more dust

 

[alexgorod]

The front disks have some rust, but smooth after 33K miles. The rear, both of them, look like this

Any idea why?

 

[ChrisO]

1 pedal makes no difference in friction brake use on the MME. The MME uses hybrid braking, and will always start with regen and add friction braking as needed even if you press the brake pedal. This is unlike Teslas, but similar to I think every other EV. And, Tesla is changing to this style of braking in future models.

Since there isn't a lot of friction braking used, the rotors tend to often get an oxidation build up. That oxidation rubs off when the friction brakes do get used (heavy braking, or any braking less the 5mph, or any braking done while the car is in N), leaving a nice rust colored deposit on the rims.

My MME seemed to have a lot of brake dust for the first few months. After that, it seems to be not much different than other vehicles I have owned. There was some speculation that different drive modes were better/worse, but no one had a great explanation of why. Whisper seemed to be the consensus for the worst offender.

This explains what I suspected. Until recently my wife wasn’t using one pedal driving. And we would monitor the brake coach and the kilowatts per mile and she was getting just as good of ratings and mileage as I was with one pedal. The key when driving without one pedal was being light on the brake pedal and smooth with it.

which basically reinforces my idea that one pedal driving forces people to be better drivers at least in the stopping of their car, but a person that has already not ramming on the brakes to stop Its pretty much doing the same thing. But of course, without the benefit of regenerative breaking, when on an ice car.

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