to help reduce the amount of heat damage from braking. The more mass to an object, the less high temperatures will affect it & cause warping, distortion, and burns\fire.
pads
The hubs basically. But usually you won't see the hubs, they'll be hidden by the brake rotors or brake drums.
because the alignment is off Warped or out of round brake rotors/drums.
Warped brake rotors/drums.
Your car came with the option of having rear disc brake or drums. The simple way to tell is to look the the wheel and see if you see rotors if you dont see rotors than you have drum brakes
Change the brake rotors
Brake shoes are made from heat resistant friction material, bonded or riveted to a metal shoe. These are used only in brake drums. Most modern cars have brake rotors (discs) and pads made of ceramics.
Yes! It could have either disc brake pads or brake shoes in the rear. Look behind or through the wheel to see if the car has brake drums and shoes or brake rotors and calipers with brake pads.
brake rotors out of round
This is not much information, but I'll give it a try. If the front brake rotors have too much run-out, "wider in some spots than others" then the rotors need refaced or replaced. If the problem is in the rear brakes, the brake drums are out-of-round and need resurfaced. If you feel the tremble in the brake pedal when you brake, then the problem is certainly in the brake system. ------------ He is correct...the rotors are probably warped. Replace the rotors if they are warped that bad. You can get them turned but they are going to be thinner than new rotors and whatever caused them to warp last time will happen faster. (heavy braking and riding your foot on the brake can cause the rotors to warp)
bpi
When applying the brakes; if you feel the car jumping it's usually the brake rotors need "turned". And, all depending on the age of the rotors and how much your OLD brake pads have scraped them, you might need to buy new rotors. So, my answer is TURN or REPLACE brake rotors. <end>