SHIMANO BB52 HOLLOWTECH II
Fits ø24mm Outer Diameter Crank Spindle and ø42mm ID Frame Shell.
Lighter than traditional threaded BB.
Precision CNC machined and anodized alloy cups.
Ceramic Bearings for enhanced smooth pedallings and less seal drags.
For MTB use.
BB CUPS Aluminum Bearing cups with CERAMIC Bearings
SPACER 3 x 2.5mm
BB SHELL WIDTH 68/73mm