I'm running a set, there really good on a ceramic rim, lock well and have good bite. My mate tried them on a light grind i meen light leally dead and they were just turning in to dust, he had them on for 30 minutes and they were half gone. So i got them and on a ceramic there really good, if i was you i would not bother to be honist with you, get some Heatsink reds, koxx greens, plaz there all mint pads. Your choice