Sorry for this, just thort i'd ask seeing as its on the toppic dont mean to thread hyjack: I'm thinking about getting Green Rock Pads on a smooth rim, at the moment i run magura kool stops, im not 100% if its worth getting them if its the same as magura kool's because the kools seem pritty hard so i wondered if they where like the same as Green Rocks? Cheers. Laurence. PS. sorry for hyjack