FYI these work in SLX, XT, as well as XTR brakes. Not sure if the cooling fins are noticeable due to a placebo effect or not but they do seem better than the stock pads that came in my XT brakes as far as keeping brake fade down. I wish they lasted longer but I've said that about ever set of pads I've ever bought for any brakes. They are also the most quiet pads I've ever used. When wet you get the occasional squeal out of them but that's it, they are silent outside of those conditions and bite like a pit bull.