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It's used by professional teams in brutal downhill racing and Grand Tours
2012–2015 Status
and performance
The simple
Shimano BB-ES51 BSA Bottom Bracket 8l It's used by professional teamsTried, tested, and trusted. The Shimano BB ES51 is a durable Octalink V2 cartridge bottom bracket designed for Shimano Octalink V2 splined cranksets delivering reliable, low maintenance performance for MTB, trekking, and compatible road applications. The oversized 22mm hollow chromoly spindle is stronger and stiffer than a traditional square taper axle, while the Octalink V2 eight spline interface creates a rigid, play free connection between the