Shimano BB-UN300

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4Ratings
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Product details

The Shimano BB-UN300 bottom bracket is a high-quality and powerful square taper bottom bracket suitable for a variety of bicycles. With a shell width of 68 mm and an axle length of 122.5 mm, it provides a reliable and stable base for the bottom bracket assembly. The bottom bracket features a BSA installation type, allowing for easy installation and maintenance. The use of aluminum as the adapter material ensures high strength and durability, while the square design guarantees precise power transfer. This bottom bracket is ideal for cyclists who value quality and performance and are looking for a reliable solution for their cycling needs.

  • High-quality square taper bottom bracket for improved performance
  • Compatible with BSA frames for easy installation
  • Aluminum adapter for increased strength and durability
  • Suitable for standard, E-Type, and chain case variants
  • Screwed bearing cups for easy maintenance.

Key specifications

Axis diameter
34.80 mm
Frame compatibility
BSA
Axis compatibility
Square-taper
Box width
68 mm
Item number
15729786

General information

Manufacturer
Shimano
Category
Bottom brackets
Manufacturer no.
62.78665
Release date
20/4/2022

Colour

Colour
Silver
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
34.80 mm
Axis length
122.50 mm

Origin

Country of origin
Germany

Voluntary climate contribution

CO₂-Emission
Climate contribution

Product dimensions

Axis length
122.50 mm
Axle diameter
122.50 mm
Weight
305 g

Package dimensions

Length
17 cm
Width
4.50 cm
Height
4.50 cm
Weight
306 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
    2,8 %
  • 2.Shimano
    3,4 %
Source: Galaxus