Anyone with Cross Drilled & Slotted rotors ever had one or both rotors wear itself down to the point where the slot itself is flush with the rotor ? (Aka non existent, just a line now a gap/slot anymore)
 
 
that means they need replaced
 
If you see that happen, you've either got a very worn rotor, or the lines were painted on. 

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Time for new ones, they dont last forever.
 
Yes. But it doesn't matter if its cross drilled and slotted. Mine were only slotted.
 
 
 
Alex Currington wrote:that means they need replaced
Exactly, if that happens, replace them, as they are less than the DOT approved thickness.
-Aaron
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Great... lol  They're not even that old.. wtf...