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Shimano BB-UN300

47Ratings
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Product details

The Shimano Bottom Bracket BB-UN300 is a high-quality bottom bracket designed for reliable performance and stability while cycling. With a shell width of 73 mm and an axle length of 122.5 mm, it offers an optimal fit for various bicycle frames. The square axle allows for easy installation and compatibility with a wide range of chainrings. The bottom bracket is equipped with high-quality cartridge bearings that ensure improved chain stability and enhance pedaling efficiency. The product features a simple, monochromatic design and is made from durable aluminum, making it both lightweight and long-lasting. The BB-UN300 is ideal for cyclists who value performance and reliability and prefer easy installation.

  • High-quality cartridge bearings for improved performance
  • Compatible with BSA frames and square axles
  • Easy installation with threaded bearing cups
  • Lightweight and durable aluminum material
  • Optimal chain stability through integrated stabilizer.

Key specifications

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

General information

Item number
13687915
Manufacturer
Shimano
Category
Bottom brackets
Manufacturer no.
62.78676
Release date
1.9.2020
Sales rank in Category Bottom brackets
39 of 1421
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
122.50 mm

Origin

Country of origin
France

Voluntary climate contribution

CO₂ emissions
3.57 kg
Climate contribution
CHF 0.11

Product dimensions

Axis length
122.50 mm
Weight
340 g

Package dimensions

Length
16.50 cm
Width
4.60 cm
Height
4.60 cm
Weight
341 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.Sram
    3.9 %
  • 2.Shimano
    4 %
Source: Digitec Galaxus