The Shimano BB-UN300 is a high-quality square taper bottom bracket designed for reliable performance and durability in various bicycle frames. With a shell width of 68 mm and an axle length of 117.5 mm, this bottom bracket is ideal for BSA-compatible frames. It features a robust construction with threaded bearing cups that allow for easy installation and maintenance. The bottom bracket is elegantly finished in black and made from aluminum, ensuring both low weight and high stability. Its versatile compatibility with standard, E-Type, and chain case variants makes it an excellent choice for different types of bicycles and applications.
Axis diameter | 4 mm |
Frame compatibility | BSA |
Axis compatibility | Square-taper |
Box width | 68 mm |
Item number | 15722880 |
Manufacturer | Shimano |
Category | Bottom brackets |
Manufacturer no. | 707520 |
Release date | 22.4.2021 |
Colour | Black |
Exact colour description | Black |
Bottom bracket design | Bolted bearing shells |
Frame compatibility | BSA |
Axis compatibility | Square-taper |
Box width | 68 mm |
Axis diameter | 4 mm |
Axis length | 117.50 mm |
CO₂-Emission | |
Climate contribution |
Axis length | 117.50 mm |
Length | 15.50 cm |
Width | 5.10 cm |
Height | 4.30 cm |
Weight | 290 g |
Product Safety |
How often does a product of this brand in the «Bottom brackets» category have a defect within the first 24 months?
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