Bottom bracket Shimano Acera ES300 73x118 mm BSA

This bicycle bottom bracket is a reliable choice for keeping your mountain bike's drivetrain running smoothly. It sits at the heart of the frame, connecting the crankset and allowing the pedals to spin freely, so every push delivers efficient power to the chain.

Built with an Octalink axle interface, it offers a secure and precise connection with compatible cranksets for confident performance on the trail. The BSA threaded design and 73 mm shell width make it a suitable match for many mountain bike frames, while the 118 mm axle length provides a dependable fit for your setup.

Whether you are replacing a worn unit or upgrading your bike, this bottom bracket delivers steady, low-maintenance operation for everyday riding and off-road adventures.