The SwissStop Full FlashPro Yellow King Brake Pad Set represents the evolution of SwissStop's first generation Flash Pads, delivering improved braking performance in the wet with its deeper asymmetric grooves, as well as longer wear life with a thicker pad depth. The deep asymmetric grooves also enhance braking modulation.The Yellow King Pad compound is optimized for carbon rims in both the wet and dry, but works excellent with aluminum rims as well. This is especially convenient if you're regularly swapping between your racing and training wheels. However, we recommend checking the pads for aluminum debris before swapping back to your carbon rims, as metal flakes embedded in the pads could wreak havoc on your composite rims. This set comes with two pads and CNC machined aluminum holders, giving you everything needed to replace the pads on one brake.