Top choice for aftermarket upgrades\n Grooved for water displacement and fit 55mm length holders\n Dura: exact specification as Shimano pads with Kool Stop's patented plow tip, thinner than Dura 2 pads \n Dura 2: thicker for longer life, 7.65mm contact for narrower rims, and cutouts to reduce weight \n Black: standard compound designed for dry condition riding\n Salmon: aggressive compound for wet weather conditions\n Dual: combination of Salmon and Black compounds for more controlled, smoother stopping