Hi I noticed something today while I was cleaning the car (GP 1.4)

If I hit the rear side wheels with my hands a slight rattle is generated from somewhere the center of the wheel.

Any clue what this might be?

Quick update:

This is only happening if handbrake is engaged.

Stop hitting your wheels! .

Are they drums or disk brakes?

I can do that for sure!

Disk brakes !

Perhaps it's making the hand brake cable rattle? Hard to tell without being there.

Yup. It was the spring holding the cable. I think I'm paranoid sometimes... :s