Rear caliper not making full contact?


New Member
Hey guys

Hoping someone can help. I replaced front and rear brake pads and disc brakes on my friends BMW X1 2015 . Once done I took for a test drive and I could hear a loud grinding coming from the driver side that runs consistent with speed (gets louder and quieter ). Also on the brake disc right in the middle there is a thin untouched spot that goes the whole circumference of the middle of the disc? Everything was greased , cleaned up etc, but just not just why it it grinding and having an untouched area in the middle?

Thanks any help appreciated.

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