Sram GXP BlackBox External Road Bicycle Bottom Bracket w/Ceramic Bearings

While other systems rely on side loading the bearings to eliminate play, which causes premature bearing wear, the GXP system is different. The GXP system captures the left side bearing between the spindle and the left crankarm while allowing the drive side bearing to float axially on the spindle, thereby eliminating the necessity to side load bearings during adjustment. The simplicity of installation is refined: once it is tightened to the proper specifi cations you are ready to roll with a worry free BB. The GXP system uses two bicycle specific cartridge bearings and eight seals for a smooth and long lasting ride.