Wht is the clicking sound frm d back tyres of ritz???????

i found a clicking sound frm d back tyres of my ritz............the sound sometimes comes frm left and sometimes frm right.......the sound goes on incresing as the speed increases...............i found the same sound in some other cars moving on the roads tooooo(hyundai accent,tata indica).wht is d fault...........is it the engine cooling sound...........??????????pls help with the remedy
did you check your wheel bearing....even if the wheel bearing got damage or problem....it will make sound.And the sound will increase when u speed up.....try and look for it
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