Possessing superior stopping power, low pad-wear rates, very linear brake response, and a smooth, quiet performance, SwissStop RacePro 2011 Road Brake Pads are ideal for everyday use. The Original Black compound works well on all aluminium rims and is also well suited for softer alloys, including magnesium. The RacePro has deeper asymmetrical grooves and a more pronounced leading edge profile. The idea is to squeegee away more water to improve the wet weather performance and the deeper grooves help give the pads better modulation. The total pad depth is now also increased with more material above the wear line to increase pad lifespan. Packaged in a set of four to complete your bike they are primarily intended for alloy rims and are compatible with Campagnolo 10 speed, 11 speed brake calipers.