SM = Shimano Modular
BB = Bottom Bracket
92 = Dura Ace
94 = XTR
72 = Ultegra
71 = 105, Deore
MT800 = XT, SLX and Deore
RS500 = Tiagra
41 = 41mm diameter
A = MTB Shell Width 89.5 /92
B = Road Shell Width 86.5
C = Fat Bike Shell Width 107mm
Looking for the perfect bottom bracket? Look no further than the SM-BB92-41B Dura Ace Bottom Bracket! Find out why it's everything we ever wanted in this video, and see us compare it to all the other Shimano Press Fit models.