Cracks in Rear Wheel Brake Disc - K-Bikes.com - Excellence in Motion
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post #1 of 15 (permalink) Old Oct 28th, 2014, 6:38 pm Thread Starter
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Cracks in Rear Wheel Brake Disc

I gave my 2006 GT with 52,000 miles a wash on Sunday and noticed something potentially concerning. Every bolt that holds on the brake disc threads into the wheel, and each one has a crack in it, see image. Does anyone else have these? If so, should we be concerned?
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post #2 of 15 (permalink) Old Oct 28th, 2014, 8:09 pm
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Not my bike model but I think I would be concerned about any fixing for brake and wheel parts. Your photo definitely looks like a crack. I would guess at bolt torque too high first, but do you think it could be caused by brake force reaction which would be a serious concern? It doesn't look as if there is much ali cast around the threaded hole. Do you have any more like that? Ah yes you said EVERY bolt which would suggest overtorque. But now the bolt holes are cracked, the bolts won't be fastened at the correct torque. I think you are right to be concerned.



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post #3 of 15 (permalink) Old Oct 28th, 2014, 9:08 pm
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Quote:
Originally Posted by 2wheeler
I gave my 2006 GT with 52,000 miles a wash on Sunday and noticed something potentially concerning. Every bolt that holds on the brake disc threads into the wheel, and each one has a crack in it, see image. Does anyone else have these? If so, should we be concerned?
That is scrap metal now , like Vox said over tightened .
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post #4 of 15 (permalink) Old Oct 29th, 2014, 12:01 am
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Well, it's bad..like flashdog said...scrap metal, BUT...The parts diagram shows that flange as a separate piece on the final drive at only $253. So...It's not like you need a whole new $2000 final drive... Has the FD or brake disc ever been replaced that you know of? If so, did a dealer do it? Someone torqued the hell out of all of them

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post #5 of 15 (permalink) Old Oct 29th, 2014, 9:46 am
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Inch-pounds. Foot-pounds. Newton-meters. No torque wrench?

Someone didn't know the difference.

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post #6 of 15 (permalink) Old Oct 31st, 2014, 2:22 pm Thread Starter
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Original final drive and brake disc. This is from the factory. Hard to believe I'm the only one. All service work performed at BMW dealers, except for a few oil changes in-between major services.

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post #7 of 15 (permalink) Old Oct 31st, 2014, 3:15 pm
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Quote:
Originally Posted by 2wheeler
Original final drive and brake disc. This is from the factory. Hard to believe I'm the only one. All service work performed at BMW dealers, except for a few oil changes in-between major services.

Probably the same factory jackass that installs the fuel disconnect into the pump flange.

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post #8 of 15 (permalink) Old Nov 13th, 2014, 9:03 pm
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They have seen quite a bit of this on the GS model over on the ADVRider site. Never had it on my 09 GS nor on my 09 GT
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post #9 of 15 (permalink) Old Nov 17th, 2014, 1:58 pm Thread Starter
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Thanks jzeiler, I thought it couldn't just be me. I'll check over there.

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post #10 of 15 (permalink) Old Apr 28th, 2015, 1:26 pm Thread Starter
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After several calls to my dealer who told me to expect a letter April 21, he told me yesterday BMW is now suppling parts to dealers for installation the week of May 11. Told me to call roadside assistance to schedule a tow. Still no letter from BMW.

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