Why should I have my tyres balanced every time I change them?

Question from visitor, 18/12/2009 : Why should I have my tyres balanced every time I change them?
Answer by rezulteo, 18/12/2009 :

Wheel balancing redistributes the weight that your tyres carry more evenly. This prevents your steering wheel from vibrating. It is therefore important to have the wheels balanced every time you change your tyres.