BBT-44x16-24 - Pro BB Cup Socket tool 44mm x 16 splines44mm by 16 spline cup tool with an inner bearing guide insert for cranksets with 24mm bearings (Shimano).This tool is designed for the professional removal and installation of BSA24/Shimano FC-32 BB cups with 24mm ID bearings for Shimano cranksets. The 44mm by 16 tooth spline cup matches all BB cups designed around the threaded external Shimano FC-32 standard (includeing our Torqtite BB86/92 BBs).The updated design of the line of Enduro BBT Pro cup tools feature a unique design that allows you to switch between 24, 29 and 30mm inner guide inserts or a universal insert, depending on the application. The inner guide inserts simply snap-in to keep everything straight while installing and removing BB cups. Each snap-in insert features a 3/8 inch drive for use with a torque wrench or breaker bar. Spline cup options include: 52x16 (T47 & Torqtite BB386 and PF30), 46x12 (BSA 29&30), 44x16 (BSA24/FC32) & 41x16 (Maxhit BSA24/FC25). The entire tool is precision manufactured of the same aluminum alloy (6061 T6) as our BB cups to ensure secure, no-mar cup installation and removal.