Installing a new bottom bracket can give your bike a new lease of life after tough seasons on the roads and trails however pressing the bearings into the frame incorrectly can damage both the bearings and the bottom bracket shell the lifeline press fit bottom bracket press uses precision bushings to guide the bearings into the shell easily and accurately helping you get the best from your frame and bottom bracket supplied with bushings to fit bb86 bb30 and bb90 press fit bottom bracket sta