The bottom bracket bearings for the Hollow Tech II FCR9100 crankset,  which is the ultimate crankset for stiffness whilst keeping weight low for performance riding & racing. Key 
 Features: Minimal bearing interface gives superbly smooth rotation Distinctive style that exudes quality & perfection Required for installation of FCR9100 chainset,  with a choice of English or Italian thread BB cups Use TLFC34 or TLFC24 in conjunction with TLFC36 adaptor tool for installation & removal