Shimano SM-BB71-41B (I-SMBB7141B)

Shimano SMBB7141B Pressfit Bottom Bracket 41 x 86.5mm Bottom Bracket To best meet customer needs, SHIMANO has developed the Press-Fit bottom bracket, which keeps us focused on our ultimate goal: total pedaling performance. The bottom bracket remains firmly supported by the bearings, which are spaced further apart using HOLLOWTECH II technologies, resulting in highly efficient power transfer.