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Shimano BB-UN300

52Ratings
BrandMore from Shimano
Delivered between Tue, 9.6. and Wed, 10.6.
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Product details

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 longevity. 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 screwed bearing cups allow for easy installation and maintenance, making it a practical choice for all cyclists.

  • High-quality cartridge bearings for improved performance
  • Available in standard, E-Type, and chain guard variants
  • Robust square axle for increased stability
  • Aluminum adapter material for lightweight construction
  • Easy installation with screwed bearing cups.

Key specifications

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

General information

Item number
16828829
Manufacturer
Shimano
Category
Bottom brackets
Manufacturer No.
62.78670
Release date
14.10.2021
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
1.21 kg
Climate contribution
CHF 0.11

Product dimensions

Axis length
113 mm
Weight
289 g

Package dimensions

Length
13.50 cm
Width
4.50 cm
Height
4.50 cm
Weight
308 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
    0.5 %

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
    3.9 %
  • 2.Sram
    4.2 %
Source: Digitec Galaxus