The Ibis Mojo HD Polycarbonate Cable Guard will let you charge down the absolute nastiest of rocky trails with zero fear of a pinched, torn, or smashed brake hose or rear shift housing. It's made to be tough enough to withstand a serious battering from sharp rocks and other flying debris. It bolts right onto existing threaded inserts in the downtube, and your cable housing and hoses nest right inside. In fact, the guard routes them along an optimum path as they exit just above the bottom bracket.