Do you need new rotors if your car shakes when you put on the brakes?

All depends on how the roters look need turning or not, or can be. Bad tires? greg

A good thing to do on brakes is go to a place that does brake repair. The big names will do a FREE inspection and tell you what is going on. It is 'safe' to do so. They usually won't do any work until authorized to. One exception is some places will tell you they are worn illegally and must be fixed (Les Schwab in the NW does this). Most don't, but remind them they are not law enforcement and tell them you'll do the job. Anyway--Sears, Firestone, Goodwrench, etc. will all give a free inspection and recc. what needs done. Sometimes you can just turn the rotors w/o new ones.