Hi guys,
My C5 has developed a regular (appears to happen with one revolution of the wheel - so happens more often when going faster and vice versa) sqeaky groan from somehwhere aroound the rear axle when I'm 'coasting' with the motor off or pedalling. I have had a look and nothing appears to be out of place/broken. I've re-adjusted the rear offiside wheel bearing and greased the nearside one and it's made no difference. Any ideas?