About Shimano BB-ES300 73X121mm English Bottom Bracket
Stiff and lightweight for efficient power transfer, durable spline reinforced construction. 8-splined OCTALINK interface increases the strength and rigidity of the entire assembly.

Features
8-splined OCTALINK technology

26g lighter weight than BB-ES25

Specifications
Model No: BB-ES300

Series: Shimano Alivo M4000 Series

Threaded bottom bracket shell width: 73mm

Axle length: 121mm

About Shimano
Shimano is a Japanese multinational manufacturer founded in 1921 by Shozaburo Shimano. They are well known as the largest bicycle component manufacturer in the world with their main manufacturing plants in Kunshan, China; Malaysia; and Singapore. Along with cycling components they also produce fishing tackle, and rowing equipment.