weird intermittent sound when bike moves at 0-5 km/h

[killergoa]

Greetings everyone..

so lately my bike has been making weird noises, and these are audible only when I move the bike as slow speed.
They are vibration-like sounds, that make a soft metallic 'hum'... and its frequency is proportional with the speed I move my bike, so that got me thinking it might be related to the wheel.. specifically the rear wheel. After some trials, I discovered that if I slightly press the rear brake (not enough to stop the bike movement) the sounds disappear.
So my idea is that the brake calipers are either wrongly set or the disc brake is not completely flat...
Any suggestion/idea? My bike still has the warranty, so I think I'll bring the bike in for a check, but I  thought I'd write it here to see any comments first.

Cheers :)

[Robell]

Difficult to say without hearing it, but I think i'd take the pads out, and give everything a good clean.

A small dab of copper grease, on the back of the pads, might help.

[scoot]

As Rob say's, but If i was you take it back and let the dealer sort it out first.
Scoot 

[scoot]

Did you get it sorted bud?? what was it??
Scoot 

[hl3013st]

Check it with the dealer

[killergoa]

Hi guys, thanks for the replies! Actually it's been snowing/raining in these days, so I'll wait better wheather! Next week should do! I'll keep you updated.

[scoot]

Ok bud not very nice here 3c rain and cold. Where abouts in Italy are you.
Scoot 

[hl3013st]

Today we have 16C here

[scoot]

16c nice George get out for a waz eh  hey and once you get used to the black one trade up for the faster one RED go on you know you want to.
Scoot 

[hl3013st]

i want to, but tomorrow i will be to munich, so i will be freezing to death