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Shimano BB-UN300

49Ratings
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Product details

The Shimano BB-UN300 is a high-quality bottom bracket designed for reliable performance across various types of bicycles. With a shell width of 73 mm and an axle length of 118 mm, this bottom bracket provides an optimal fit for BSA frames. It features a square taper interface that allows for easy installation and removal. The bottom bracket is made from durable aluminum, which not only increases longevity but also reduces the overall weight of the bike. The threaded bearing cups ensure a stable and secure connection, facilitating smooth power transfer while pedaling. The Shimano BB-UN300 is therefore an excellent choice for cyclists who value quality and performance.

  • Compatible with BSA frames for versatile applications
  • Robust aluminum construction for increased durability
  • Easy installation with square taper interface
  • Threaded bearing cups for stable connection and smooth power transfer.

Key specifications

Frame compatibility
BSA
Axis compatibility
Square-taper
Box width
73 mm

General information

Item number
16341849
Manufacturer
Shimano
Category
Bottom brackets
Manufacturer no.
62.79035
Release date
30.7.2021
Sales rank in Category Bottom brackets
39 of 1416
External links
Manufacturer's site (de)

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
73 mm
Axis length
113 mm

Origin

Country of origin
France, Germany

Voluntary climate contribution

CO₂ emissions
3.16 kg
Climate contribution
CHF 0.11

Product dimensions

Axis length
113 mm

Package dimensions

Length
13.60 cm
Width
4.90 cm
Height
4.40 cm
Weight
302 g

30-day right of return
24 Months Warranty (Bring-in)
2 additional offers

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Reviews & Ratings

Warranty score

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

Source: Digitec Galaxus
  • 1.Sram
    0.3 %
  • 2.Shimano
    0.4 %

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: Digitec 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: Digitec Galaxus
  • 1.Shimano
    4 %
  • 2.Sram
    4.1 %
Source: Digitec Galaxus