Rear disc scoring normal?

[Soultrappa]

Has anyone had their rear disks looking like the attachment? I have taken it to the dealers and only then did I notice that their test model was the same. Engineer checked and said couldn't find anything wrong.

 

[siteguru]

It's not unusual for the rear disks to get insufficient use on an EV for them to wear properly.

The easy solution is to set regen to 1, get up to a decent speed on a clear road and then stamp on the brakes. Do that 2 or 3 times and things should look better.

 

[Bricktop X PWR]

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Thread 'XPower Rear Discs - Outer edges slightly scored anyone ?'

XPower Rear Discs - Outer edges slightly scored anyone ?

 

[Lovemyev]

I try to remember to turn the Regen to the lowest setting once a week and then use the car in that setting all day.
The foot brake on main EV’s get very little work to do due to the Regen braking.
Given that the front brakes provide about 70% of the stopping power, it leaves the rear brakes having a very easy time in life.
It’s basically down to a lack of use and after time, the rear discs will become badly corroded and pitted with rust.
This can be the focus of attention at service and MOT time !.
Give them a work out once a week to keep the rust bunnies at bay ?.

 

[Deleted member 11291]

Even when doing the suggested a number of times, I have yet to get them looking the same as the fronts. They do improve but not fully cleared.

 

[Soultrappa]

Even when doing the suggested a number of times, I have yet to get them looking the same as the fronts. They do improve but not fully cleared.

this!

 

[Bricktop X PWR]

this!

Try Harder. ?

On a serious note (I know!)

Just had a check of mine and the Off Side Rear, does have some scoring.

The other 3 are as I would expect.

More upsetting are my rusty bells.

To be attended to.....

 

[JonnyG]

Yep, my back two discs have the scoring too, which is the most concerning to me. I can clear the rust and squeaking with some beefy braking sessions but not all the scoring.

 

[pjmmk]

Damaged brake disks is partly a result of government legislation. We're no longer allowed to use 'dangerous' materials in brake pads so they are now much harder then they used to be. That resulted in poor braking performance so the manufacturers had to use softer material in disks to compensate.
Now, whenever any little stones or rocks get caught between the pads and disks, they gauge a groove in the soft disk. Your dealer can skim them but it'll happen again. The only way to avoid it is enclosed brakes but who wants to go back to drums?

 

[Bricktop X PWR]

Yep, my back two discs have the scoring too, which is the most concerning to me. I can clear the rust and squeaking with some beefy braking sessions but not all the scoring.

The odd thing about this is I've stripped the brakes down (in a thread here somewhere....) and I didn't find anything causing it.
Pads were flat, no grooves or grit involved.

Can only conclude that now lots of folk are finding this that it might be a manufacturing anomaly?

 

[Alb]

Must admit I do have suspicions about material quality.

 

[siteguru]

but who wants to go back to drums?

In a rear wheel drive EV with regen braking? Me please!

 

[Lovemyev]

The VW ID3 has drums on the rear also, no problem with any premature disc corrosion here of course !.