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      10-16-2012, 06:44 PM   #7
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Drives: E90 M3
Join Date: Oct 2011
Location: Midwest

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Originally Posted by Robz26 View Post
It happens too frequently when the tire is barely rotating to think something got caught inside.
I've been fortunate enough to experience the cowbell a couple of times. Exactly like your audio, and only could be heard at very low speeds, e.g. approaching a stop. Both times were preceded by driving in a parking lot with some gravel/pebbles.

Do something approximating a brake bedding session and see if it goes away. (With the regular brakes, that is.) Multiple stops from ~60 mph. Warm the brakes up and stomp on them. Worked for me.
DCT E90 M3: Akrapovic Evolution, KW Clubsport, Stoptech ST-40 Front + Pagid RS29 | Stock Rear + Stoptech SP, Apex ARC-8 + Hankook Ventus S1 noble2 275 35 18 (street), Apex EC-7 18x10 ET25 + Nitto NT01 275 35 18 (track), tbd...
Past: Velos Designwerks Tune, Megan Racing Catback, Macht Schnell Filter