Front pad lifespan.

[o89canucks]

Originally Posted by Yaris Hilton

It's pretty much unheard of for disk brake rotors to actually warp. They get irregular patches of brake pad material deposited on the surface when used hard, especially if left with the pads in stationary contact with them while hot (i.e., the car's stopped for a bit after making a hard panic stop), and that makes the car shudder and pedal pulsate. Turning the rotor takes that off and gives a clean new surface, but they may also clean up with gentle normal use for a while, or with vigorous cleaning.

Who told you that pile of garbage???

I have resurfaced a lot of rotors and you can definetly tell that a rotor has lateral runout when it is on the brake lathe. Take a hot rotor and drive through a puddle or snow and it is like taking a hot pan off the stove and pouring cold water into it from the sink. I have even seen the lateral runout be so bad (most common in Mitsubishi's) that the steering wheel will have a shimmy while the brakes aren't applied.

The clamping force of the pads against the rotor is so stong that even if your theory of "brake pad deposits" had any truth to it, the "brake pad deposits" would be removed the very next time that you braked.

I guess flywheels never get hotspots in them either or warp out and never need to be resurfaced either if this theory were true?