SHIMANO BB-ES300 ACERA OCTALINK BOTTOM BRACKET

Splined bottom bracket for use with Shimano Octalink chainsets. Smooth and precise shifting performance with HYPERDRIVE technology

• Replacement for BB-ES25, now 25g lighter
• Tubular 22mm spindle for Octalink V2 crank arms
• More rigid assembly than square taper
• Sealed cartridge bearings
• Mounting bolts not included