TriPeak T47 68mm 3-in-1 Bottom Bracket RoadT47 68mm (Road) : 3 in 1 3 in 1 Core System (HTII DUB 3D+) P05 Steel Bearing 16 Notch Standard BB Tool Black Color The P05 precision steel ball bearings, for reassuringly high smoothness and durability. 0. 005 mm for eccentricity (out of roundness) of the track in the inner race. Thats precise. The 3 in 1 Core System BB set can accommodate for three different crank spindle specifications. Easily switch between different cranks without the need to