Cast Iron Brake Disc Rear Bell 355*22mm For Audi RS3 8P Back Wheel

How do u know if u need new rotors?
It could represent four signs that it's time to replace your brake rotors.
1. Vibrating Steering Wheel. If you feel pulsing in the brake pedal and vibration in the steering wheel when you slow down, your rotors could be signaling trouble.
2. Intermittent Screeching.
3. Blue Coloration.
4. Excessive Wear Over Time.

How Do I Break In My New Brake Pads and Rotors?

Find an empty parking lot or street. ...

Engage hard braking at 40mph. ...

Go 50mph and jam the brakes until ABS engages.

Repeat step #3 four more times.

Reach 65mph, then slow the car down to 15mph. ...

Let your brakes rest for 20 minutes.

Conclusion.

Extend the Life of Your Brakes.
"Bedding-in new pads and rotors should be done carefully and slowly... Most brake pad compounds will take up to 300-400 miles to fully develop an even transfer film on the rotors." Failure to follow these procedures may result in brake judder, excessive noise, or other difficulties in bedding-in the new brake pads

The high and low spots will become more and more exaggerated over time, causing the vibrating to worsen until you either have your rotors resurfaced, or you replace your brakes altogether. If you don't break in your brakes, you'll notice yourself needing to replace the pads and rotors more often.

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