The Shimano BB-UN300 is a square taper bottom bracket designed for smooth pedalling performance and long-lasting reliability. With sealed cartridge bearings to keep out dirt and moisture, it’s an excellent upgrade or replacement for bikes using a traditional square taper crankset.
Why Choose the Shimano BB-UN300?
Component |
Specification |
Model |
Shimano BB-UN300 |
Type |
Square taper (JIS) bottom bracket |
Shell Widths |
68 mm, 73 mm |
Spindle Lengths |
107 mm, 110 mm, 113 mm, 117.5 mm, 122.5 mm, 127.5 mm |
Axle Type |
Square taper (JIS) |
Bearings |
Sealed cartridge unit |
Application |
MTB, trekking, hybrid, city bikes |
Specifications subject to change without notice
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