SHIMANO BB-ES51 Octalink V2 Bottom Bracket Review Posted by Pelicandy October 5, 2018 in Drivetrain Components Octalink V2 compatible Labyrinth seals keep contamination out of bearings Standard BSA threading 22mm hollow spindle Shimano Reference Number: BB-ES51 the smooth sealed bearings of the Shimano BB-ES51 will keep you pedaling smoothly for miles. Random Products SRAM X01 GXP 1X11-Speed 175 94BCD with 32T Direct ... SRAM PG1070 10-Speed Cassette Review SHIMANO TL-FC Crank Tools Review Sunlite Sealed Bottom Bracket Cup Set for 3-Piece ... Cycling Outdoor Recreation Parts & Components SHIMANO Sports & Outdoors