Flywheel shaft Shimano BB-UN300 BSA 68/122

Shimano BB-UN300 BSA 68/122 mm is a cartridge bottom bracket designed for bicycles equipped with square taper cranksets and a BSA threaded bottom bracket shell.

Key Features

Construction and Design
The BB-UN300 features a sealed cartridge bearing system that protects internal components from water, dirt, and dust. Its durable steel spindle and robust construction provide long-lasting and reliable performance.

Main Functions
The 122 mm JIS square taper spindle is compatible with a wide range of Shimano and other Square Taper cranksets. Sealed bearings ensure smooth rotation while minimizing maintenance requirements.

Usage and Compatibility
Designed for frames with a 68 mm BSA threaded bottom bracket shell. Suitable for city, touring, mountain, and other bicycles using square taper cranksets.

Additional Features
The cartridge design enables quick and straightforward installation or replacement. Effective sealing helps maintain smooth operation in a variety of riding conditions.

Summary
The Shimano BB-UN300 BSA 68/122 mm is a reliable and durable bottom bracket for riders seeking smooth performance and low maintenance. Its broad compatibility makes it suitable for a wide range of bicycles using square taper crank systems.