Kool stops new v type 2 insert just got heavier with 15mm more pad material than their original v type insert and still fits most shimano style v brake holders by controlling all of the ingredients in the rubber compound and by milling all of the rubber in their own factory kool stop have constantly improve the quality of their brake pads and maintain rim friendliness the triple compound is their most aggressive compound combination for superb braking and controlled stopping in all weather