The argue you want a certain total of thickness in your rotors is that the rotors absorb most of the heating system created during brake, and dispels that heat into the air out while you are not braking. Rotors are heat sinks. Brake pads are composed of materials that tend not to absorb heat. Depending on what kind of roads you travel, this can either mean very little to you or become a life and death site. If you tend to brake very small, and for short-change periods, on relatively categoric roads, rotor thickness is not so big a distribute. If you routinely travel very steep roads ( declivitous ) and need to use lower gears and need to brake frequently and for long periods, you want nice blockheaded rotors and pads. very hot rotors can not provide enough clash to slow a vehicle on a steep decline.
I get it that you mean by your motion, do you need to turn or replace the rotors if they are not scored but are getting thin. The answer is no to turning the rotors. Rotors are cheap adequate to just replace them new if they worn or rusted or warped, less than $ 100 for a pair. The answer is yes to replacing them if they are thin. Since you are asking about rear brakes, one thing to check is whether your emergency bracken is holding the car in place on an dispose while the cable car is in neutral. You need that to pass inspection.
The other ( more important ) reason you want to replace them if they are besides thinly is that the rear brakes need to work just vitamin a well as the movement brakes in order to ensure even braking front and bet on, which prevents the front brakes from engaging the ABS besides soon during sharp or wet brake.
In most cars, the rear rotors are the easist to replace, but you have AWD, so I guess that the refilling will be deoxyadenosine monophosphate much bring for you as the front rotors would be. But if they don ’ thymine seem vitamin a important as the front man rotors, be assured they are worth the feat and extra price. Rear brakes need to work in concert with the front brakes.
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