Froff MTB Co. The BufferFroff MTB Co. The Buffer A shim for your rim. Designed and tested in conjunction with Pablo's Bike Shop, and the Pablo's X Froff team riders. The Buffer is a tyre insert that is aimed at saving you from a long walk out of the forest and an expensive repair bill. NZ designed. Made from EVA foam, The Buffer provides protection from pinch flats and dents in your rim. Minimal sealant absorbtion. Simple to use, Hook and Loop closure. Can only be used with