So I've started to hear this weird noise, it seems to be coming from my front left tire area.

It basically sounds as if the little cap in the middle of the mag is loose and rattling, but its not that I checked.

It only happens when I hit a bump, anytime I hit even the slightest bump I hear a little rattle. It is not loud at all and it sounds like a very small piece of metal rattling...

I have no idea what it is, it doesn't sound very serious.

Any ideas?