Shimano Acera ES300 Bottom Bracket 73x121 mm BSA

This bicycle bottom bracket is a reliable drivetrain component built to keep your crankset running smoothly. Designed with an Octalink axle interface, it offers a secure, stiff connection between the crank arms and the frame for efficient power transfer with every pedal stroke.

It fits frames with a 73 mm wide bottom bracket shell and uses standard BSA (threaded) mounting for straightforward installation and compatibility. The 121 mm axle length helps ensure proper chainline and clearance for a dependable, quiet ride.

• Octalink axle interface for a stiff, secure crank connection
• 121 mm axle length
• Fits 73 mm bottom bracket shell width
• BSA threaded standard for easy installation