I was just wondering when do you have to resurface you rotors... ?


DBM?


Thanks...

 

If you have lots of miles on them and going to change the brake pads then you should resurface the rotors too. The mechanic can measure the rotors and tell you how much is left. If the rotor gets to thin you will have to replace it. This doesn't apply to slotted or cross drilled rotors.

Ken

 

I was told that you can simply take your tire off and take your finger and move it from the center to the end in a straight line(like when you clean a cd), and if it feels smooth then your ok, and if it feels wavy (warped), then they need to be machined (or changed?)..... Does anyone know what I'm talking about and if this is accurate or not??? Thanks in advance..

-Nate

 

Opinions vary.

Since I autocross, I am willing to spend a little extra to get as much braking as possible out of your car, so I turn the rotors when you install new pads. This gives the new pads a new surface to seat against. I will probably have to replace the rotors after 2 to 3 cuts.

If you are not looking for that last 5%, turn your rotors only when they are warped or when changing pads you notice that they have grooves. If you can feel surface irregularities by dragging a fingernail across them, then it's time to have them cut.