Wheel bearing or...stone behind disk?

Caporegime
Joined
23 Dec 2011
Posts
33,103
Location
Northern England
High pitched squeal. Can hear it on passenger side only. Doesn't start initially but builds after driving for a short while. Disappears when turning left.
'pulses' at lower speeds.

Bmw i3s.
 
The answer was stone. Wheel off, blast of compressed air and out it flew. Was between the caliper and disk though!
 
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