Shimano BB-UN300

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Product details

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.

  • High-quality aluminum construction for durability
  • Compatible with BSA frames and square taper axles
  • Easy installation with threaded bearing cups.

Key specifications

Axis diameter
4 mm
Frame compatibility
BSA
Axis compatibility
Square-taper
Box width
68 mm
Item number
15722880

General information

Manufacturer
Shimano
Category
Bottom brackets
Release date
22/4/2021

Colour

Colour
Black
Exact colour description
Black

Bottom Bracket Features

Bottom bracket design
Bolted bearing shells
Frame compatibility
BSA
Axis compatibility
Square-taper

Mounting

Box width
68 mm
Axis diameter
4 mm
Axis length
117.50 mm

Voluntary climate contribution

CO₂-Emission
Climate contribution

Product dimensions

Axis length
117.50 mm

Package dimensions

Length
15.50 cm
Width
5.10 cm
Height
4.30 cm
Weight
290 g

Legal Notice

Product Safety

14-day cancellation right
30-day right of return
24 Months statutory warranty

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Reviews & Ratings

Statutory warranty score

How often does a product of this brand in the «Bottom brackets» category have a defect within the first 24 months?

Source: Galaxus
  • 1.Shimano
    0,2 %
  • 1.Sram
    0,2 %

Statutory warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Galaxus
  • 1.Shimano
    0 days
  • Sram
    Not enough data

Return rate

How often is a product of this brand in the «Bottom brackets» category returned?

Source: Galaxus
  • 1.Sram
    2,9 %
  • 2.Shimano
    3,4 %
Source: Galaxus