Do you need to replace rotor while changing brake pads?

My volvo xc70 has 50k miles on it and the rear brake pads were replaced by a friend of mine. He thinks the rotor is fine. But I hear that they should be replaced at the same time. Is it true? Thanks! 

所有跟帖： 

• No if your rotor disc is fine. -knp- ♂ (65 bytes) () 04/11/2011 postreply 13:25:20

• Rotors are fine for at least 150kmi in most cases -internuts- ♂ (190 bytes) () 04/11/2011 postreply 17:07:11

• Rotors are fine for 2 set of pads in cold areas. -1800800- ♂ (0 bytes) () 04/11/2011 postreply 17:54:13

• it's right - a set of pads lasts abt 80kmi -internuts- ♂ (0 bytes) () 04/12/2011 postreply 06:52:16

• 回复：Do you need to replace rotor while changing brake pads? -shgl999- ♀ (199 bytes) () 04/12/2011 postreply 08:17:25