M Carbon Ceramic Brakes - Serious Wheel Clearance Issue (rocks / stones)

[Geordie33]

Originally Posted by Mark's M

You should send a note to one of the Moderators asking that this thread 1) be made into a "CCB problem/Issue" thread with the potential for safety concerns and 2) that it be moved from this sub-forum to the general forum and then "stickied" so that it doesn't disappear from the front page.

There are a lot more CCB owners out there that may not be interested in wheels/tires and therefore don't look here. And probably a lot more on order. There are a group of Canadians going to the Welt in June to pick up 10 M3's/4's. All of them will be equipped with CCB's, mine included. I WANT these brakes but not at the expense of having to deal with this sort of issue. I truly hope BMW will come up with a solution and knowing BMW as I do, I'm confident they will.

Good idea, I follow your logic, however I'm relatively new to this site and not sure how to locate or contact a moderator....any guidance appreciated, thanks

[Geordie33]

Guys we making Progress in public domain also. It's easy to find this issue now on the web. Please keep it going. Thanks

[CSanto]

Awesome Geordie!

[gogoevo]

I'm not sure how it works in the U.K., but here is the U.S. we can file a safety complaint with the DOT. I'm not sure at this level yet, however.

https://www-odi.nhtsa.dot.gov/ivoq/

[RowanBuds]

I wonder if the 20" wheels that will be on the ZCP (Style 666M) are partially related to this issue.

[CSanto]

Originally Posted by RowanBuds

I wonder if the 20" wheels that will be on the ZCP (Style 666M) are partially related to this issue.

I was just going to post that theres a new 20" wheel option. I wonder if BMW will offer these to CCB owners with this issue.

Thinking about it, it definitely sucks. I want a 19" option that has more clearance. I love the fat look of the 255/35 and 275/35 tires.

[HOUSE Motorsports]

2-3mm of clearance is extremely tight...had no idea the CCB option mixed with that wheel choice was that close!!!

[Mark's M]

Originally Posted by Geordie33

Good idea, I follow your logic, however I'm relatively new to this site and not sure how to locate or contact a moderator....any guidance appreciated, thanks

Geordie scroll down to the bottom of the Wheels/Tires sub forum without opening yours or anyone's threads. You'll see the Moderator's names highlighted in red and Bolded towards the right side of the screen. Click on one of them and pm away. Dackelone is located in Germany, maybe he can gain some insight or scour the German forums for similar issues. He's very knowledgable and very helpful. They all are actually but he'd be my first choice for this one.

[schnell325]

I too am doing the ED and have the CCBs on my M3. Am I concerned? A tiny bit. Will this deter me? Never!

[Dackelone]

I heard 20's inch wheels will be offered next year. I saw some 20's on the OLED concept car.

I also know that carbon brakes have to be removed from the car and WEIGHED in order to see IF they are worn down to min specs. So you need to pay for a brake job - just to weigh them! For this reason... some of my friend's who work for BMW decided to go with regular steel brakes.


Sorry I can't be of any more help. I will pass along this thread though, to my "friends" at BMW.

Dackel



OLED Concept car with 20's...

[Mark's M]

Originally Posted by Dackelone

I heard 20's inch wheels will be offered next year. I saw some 20's on the OLED concept car.

I also know that carbon brakes have to be removed from the car and WEIGHED in order to see IF they are worn down to min specs. So you need to pay for a brake job - just to weigh them! For this reason... some of my friend's who work for BMW decided to go with regular steel brakes.


Sorry I can't be of any more help. I will pass along this thread though, to my "fiends" at BMW.

Dackel

Thank you sir!! It'd be exceptionally helpful to get an assessment from an engineering perspective, ie is there really any potential for a loss in the structural integrity of a wheel under these conditions or will it simply be a cosmetic thing that owners would have to live with?

[Artemis]

As this appears to be safety related too, I also bring this thread to the attention of SCOTT26

Maybe he can also be of any assistance.

[RowanBuds]

Originally Posted by Dackelone

Sorry I can't be of any more help. I will pass along this thread though, to my "fiends" at BMW.

Dackel

I think you're confusing something here. The "fiends" are the people on this board, the "friends" are at BMW .

Hoping to hear something from BMW on this as I have the CCBs specced and will not be getting a 2016, so whatever is in the production pipeline in 3 weeks is what I get. I gotta say though, I wouldn't be thrilled if they swap the 19's for 20's, as I personally like the OEM 19's much better than the LCI photo wheels. Plus I much prefer 19 to 20. Maybe they can just get a redesigned 19, similar to the MORRs, that give a measurable amount of increased clearance. I'd take that solution happily!

[Periokid]

I just joined the CCB wheel damage club. My car has 400 miles on it. I was driving about 25 mph and I heard "the sound". From this board I knew exactly what it was. I stopped the car, put it in reverse and dislodged the stone. Now I have a nice gouge all around the inside of the passenger side front wheel. I think I'll wait for my 1200 service to make a complaint. Will BMW really replace the rim? I hope there will be a fix for this. This is going to happen all the time!

[Mark's M]

Originally Posted by RowanBuds

I think you're confusing something here. The "fiends" are the people on this board, the "friends" are at BMW .

Hoping to hear something from BMW on this as I have the CCBs specced and will not be getting a 2016, so whatever is in the production pipeline in 3 weeks is what I get. I gotta say though, I wouldn't be thrilled if they swap the 19's for 20's, as I personally like the OEM 19's much better than the LCI photo wheels. Plus I much prefer 19 to 20. Maybe they can just get a redesigned 19, similar to the MORRs, that give a measurable amount of increased clearance. I'd take that solution happily!

Ditto on all counts. Those wheels look like they belong on the XM twins, not these cars. Maybe they'll look better in silver, I'm like you and ordered the silver vs the black. But 20's will be 20's no matter the color and only add unnecessary weight. If a fix is in the cards, fingers crossed they'll remain 19's.

[Periokid]

Originally Posted by Brosef

if BMW makes 20" wheels a requirement for CCB's, I'm going to have to pass on them. 20" wheels just aren't for me. there must be another solution. Maybe a little plastic piece at the bottom of the caliper that gets real close to the barrel (almost like a scraper)? just pulling things out of my ass.

I was thinking something like your idea too, lol.

[edwinm3]

That 20" wheel option is fugly!!!

[LDSM]

Wow this is disheartening.
A 20" OEM wheel on an M3/M4 just to get CCB's eliminates all of the benefits of CCB's in the first place.

Would adding spacers to the existing wheels help the issue at all? At least until BMW offers a solution.

[Geordie33]

Originally Posted by LDSM

Wow this is disheartening.
A 20" OEM wheel on an M3/M4 just to get CCB's eliminates all of the benefits of CCB's in the first place.

Would adding spacers to the existing wheels help the issue at all? At least until BMW offers a solution.

The issue is that the position where the stones get trapped is on the barrel of the wheel and its a pure radial clearance issue. Spacers would not have an effect as the physics would remain the same.

[Geordie33]

Here is the second wheel Which was damaged, notice it had 1 full circumference damage and 1 partial, same stone or 2 stones is anyone's guess.

[JoeFromPA]

Guys,

No pictures, but I have this very similarly with my stock 18" wheels and stock brakes. The clearance is that tight - but they look amazing

I think the only current way to avoid this type of damage is to go with 19" wheels and stock brakes.

[CSanto]

Originally Posted by JoeFromPA

Guys,

No pictures, but I have this very similarly with my stock 18" wheels and stock brakes. The clearance is that tight - but they look amazing

I think the only current way to avoid this type of damage is to go with 19" wheels and stock brakes.

wow interesting that this is happening on stock 18s and stock brakes.

I hope BMW replaces everyones wheels and comes up with a solution.