How do I adjust a handbrake on a 1.8 Astra Mk4 Sxi? It's 4 stud but has discs on the front and rear. I have just done the brakes front and back and her handbrake was a little high, so I adjusted it by the nut on the handbrake, and had it nice and tight at about 3 clicks. I have just parked on a bank and put the handbrake on and it rolled away . What have I done wrong notsure.gif . I used to adjust Nissans by the same nut nexr to the handbrake dunno..