Kool Stop Mountain Brake Pads. Features: Top choice for MTB cantilever and linear brakes Extra-long, curved design allows pad to contour the rim for better braking performance Grooved for water displacement with patented angled tip plow Available in threaded or smooth post, non-threaded Black: standard compound designed for dry condition riding Salmon: aggressive compound for extreme weather conditions Dual: combination of Salmon and Black compounds for more controlled, smoother stopping Specs: Model:Mountain Post:non-threaded Compound:dual