Bottom Brackets Shimano BB-ES51 Octalink Bottom Bracket

Shimano BB-ES51 Octalink Bottom Bracket
Shimano manufactures a wide range of different cranksets and matching bottom brackets so that the optimum system will always be available for each kind of bicycle and riding style.

Specifications:
Application: Cross Country
Type: BSA
Shell Width: 68mm, 73mm
Axle Length: 113mm, 118mm, 121mm,
Axle Type: Octalink (MTB)
E-Type Compatibility: no
Chaincase Compatibility: no
Shimano Model # BB-ES51

Technical Information:
Bearings: steel
Axle Material: steel
Bottom Bracket Cup Material: resin (left), steel (right)

Compatibility:
– FD-M530
– FC-M540
– FC-M510
– FC-M470
– FC-M440

Features:
– hollow pipe construction
– oversize axle (22 mm) increases stiffness and durability while keeping weight low
– multiple splines interface between bottom bracket and crank arm
– sealed cartridge bearings

Technology:
Octalink
Compare the power transfer of Octalink with the conventional square taper spindle, and the 8-splined Octalink interface that connects bottom bracket and crankset increases the strength and rigidity of the entire assembly.