If it's a silent runner (not spinner) from exotic nutrition. Is it put together properly? When I got my first one, I didn't press the front and back panels together firmly enough, meaning there was a gap either side of the little plastic joining strip, and also meaning the wheel had a bit of a scissors action. But it was silent. I have noticed my wheel makes a slight whirring noise when it's on the stand now I've had it quite a while, but it's silent when attached to the bars.
Also do you have all the parts attached (there's a spacer between the wheel and the nut)?
Or it could be yours has faulty ball bearings. I would check it's put together ok and if so send it back for an exchange - they are usually silent! If it's a silent "spinner" though - they aren't silent - still send it back!
If it helps I did a video review of it - at the end are some photos showing how to put it together.
https://www.youtube.com/edit?o=U&video_id=VFussTX5PuE
Just noticed you're in the Uk - where did you buy it from?