The ball bounces heavily upon landing.
"I bought these rotors to replace my brakes with 4-piston XT BR 8020 calipers. I noticed the rotors were a little greasy when they arrived. I decided to install them anyway, and after bleeding the system properly—with pads that were already broken in and ventilated—I’m having trouble getting them to stop, and they don’t brake very hard, as if the rotors and/or pads were contaminated. Of course, I tried cleaning everything properly by removing some material from the pads with sandpaper. But no results. So now I don’t know what to do. I’m convinced these are good rotors, though. Best regards"
