Short answer: No (usually). 

In most cases, *AS LONG A YOUR ROTORS ARE WITHIN THEIR WEAR-LIMIT, which should be stamped on the rotor*, you can get away with using our brake pads on used rotors. But there are several exceptions as we outline below:  

A precautionary approach is to follow our Rotor Reset Procedure which is a good idea for routine maintenance in general. 

Exceptions

1. Odd Rotor Wear

Often times rotors will wear unevenly over a long period of time (a season or two). This will create a concave & uneven surface which not allow for the proper 100% brake pad surface to brake rotor surface contact. 

How do you know? Feel it with your fingers - pinch the rotor and pull away. You can usually feel if there is a worn "dip" (low spot) or high spot. 

Another good indicator can be stripes on your brake pads after use (see photo below). The stripes here show that the brake pad is only touching the high-spots on the rotor. 

2. The Prior Use of Sintered Metallic Brake Pads

Sintered metallic brake pads are the-hardest brake pad on a rotor (in terms of wear and abuse on the rotor) and can cause the most conflicts when switching to any compound, regardless of brand. 

Follow our Rotor Reset Guide here first to prep your rotors in hopes that you can continue to use them. Get aggressive with the prep and you should be ok moving forward with our brake pads. 

3. The End of the Road for a Rotor

And lastly, your rotors may just be "done", compromised in some fashion, worn out, etc. Check your wear limits, get aggressive with our prep process and do your best to save them. 

But, and this is key, it should not be hard to get a silent and powerful experience with our product on nearly any rotor. You absolutely must follow our prep process to the letter. 

How do I know if a rotor is done? 

1. Cannot get rid of the noise / howling / squealing

2. Uneven wear as outlined in Point #1 above

3. Can't achieve the proper bite and feel at the lever. If your braking power just doesn't feel right, is soft, or doesn't firmly engage, that rotor just may be done. 

Here is a great example of a brake rotor with a low spot right down the center. This rotor is worn and needs to be replaced.