The rollerblade brake pads (the rubber things) can be replaced easily. All you need is an Allen key. The Rollerblade brake pad rubbers are compatible with all modern Rollerblade brakes. They are even compatible with most old Salomon brakes (Salomon is an inline skate mark that does not exist anymore.) There is one brake pad rubber in a pack. If you prefer a pack of two brake pad rubbers, see here.