Shimano BB-ES300 73X121mm English Bottom Bracket collection_books-and-maps When a puncture is simply

When a puncture is simply too big to seal

Full-length wind guard front zipper

Cartridges are also available separately

This tough tubular rack is designed for heavy-duty

About PROOwned by parent company Shimano

Shimano BB-ES300 73X121mm English Bottom Bracket collection_books-and-maps When a puncture is simplyAbout Shimano BB ES300 73X121mm English Bottom BracketStiff and lightweight for efficient power transfer, durable spline reinforced construction. 8 splined OCTALINK interface increases the strength and rigidity of the entire assembly. Features8 splined OCTALINK technology 26g lighter weight than BB ES25 SpecificationsModel No: BB ES300 Series: Shimano Alivo M4000 Series Threaded bottom bracket shell width: 73mm Axle length: 121mm About ShimanoShimano