Hi there! I have ridden heatsink blue's before and there were awsome, so i decided to buy another pair. When they arrived, I used them and they kept sticking to my rim and wouldnt release Was proberbly a bad batch in the production. Because they sempt to have glue or somethink in the pads att the time. Oh well... I would say Koxx block, after my experience with heatsinks. Ive also heard they work well in the rain heatsinks. Hope this helps Cheers joe