The Shimano BB-UN300 is a high-quality bottom bracket designed for improved performance and stability while cycling. It features a robust square axle and is equipped with high-quality cartridge bearings that ensure smooth operation and durability. This bottom bracket is available in various mounting types, including standard, E-Type, and chain guard options, to meet the diverse needs of cyclists. The use of aluminum for the adapter materials contributes to weight reduction and overall performance of the bottom bracket. With a shell width of 73 mm and an axle length of 113 mm, the BB-UN300 is versatile and offers excellent frame compatibility. The threaded bearing cups allow for easy installation and maintenance, making it a practical choice for all cyclists.
Axis diameter | 34.80 mm |
Frame compatibility | BSA |
Axis compatibility | Square-taper |
Box width | 73 mm |
Item number | 16828829 |
Manufacturer | Shimano |
Category | Bottom brackets |
Manufacturer no. | 62.78670 |
Release date | 14.10.2021 |
Colour | Black |
Exact colour description | Black |
Bottom bracket design | Bolted bearing shells |
Frame compatibility | BSA |
Axis compatibility | Square-taper |
Box width | 73 mm |
Axis diameter | 34.80 mm |
Axis length | 113 mm |
Country of origin | France, Germany |
CO₂-Emission | |
Climate contribution |
Axis length | 113 mm |
Axle diameter | 122.50 mm |
Weight | 289 g |
Length | 13.50 cm |
Width | 4.50 cm |
Height | 4.50 cm |
Weight | 308 g |
Product Safety |
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