Shimano BB-UN300 BSA 68/117 mm Bottom Bracket is a square taper bottom bracket designed to provide smooth pedaling performance and reliable crankset operation across a wide range of bicycles.
Key Features
Construction and Design
The BB-UN300 features a durable steel square taper spindle and sealed bearings protected from dirt, moisture and external contaminants. Its BSA threading standard and 68 mm shell width ensure broad frame compatibility.
Main Functions
The sealed bearing design delivers smooth rotation while reducing maintenance requirements. The 117 mm spindle length helps maintain proper chainline and efficient power transfer.
Usage and Compatibility
Designed for frames with a 68 mm BSA threaded bottom bracket shell (1.37 x 24 TPI). Compatible with Shimano and other square taper cranksets requiring a 117 mm spindle length.
Additional Features
The enclosed construction helps protect the bearings from contamination and extends service life. As a genuine Shimano component, it provides precise fitment and dependable everyday performance.
Summary
The Shimano BB-UN300 BSA 68/117 mm Bottom Bracket is intended for cyclists looking for a reliable and durable solution for square taper cranksets. It offers smooth pedaling, low maintenance requirements and dependable performance for commuting, recreational riding and everyday cycling.
