Shimano BB-UN300

46Ratings
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Product details

The Shimano BB-UN300 is a high-quality bottom bracket designed for bicycles with BSA threads. It features a robust and powerful square axle that ensures a stable chain line. With a shell width of 68 mm and an axle length of 123 mm, this bottom bracket is ideal for various applications, including trekking bikes. The aluminum adapter material provides durable and reliable performance. The design with screwed bearing cups allows for easy installation and maintenance. The BB-UN300 is available in various versions, including standard, E-Type, and chain guard variants, making it a flexible choice for different bike configurations.

  • High-quality square bottom bracket for BSA threads
  • Aluminum adapter material for increased durability
  • Stable chain line thanks to the integrated stabilizer
  • Compatible with standard, E-Type, and chain guard variants
  • Easy installation through screwed bearing cups.

Key specifications

Box width
68 mm
Frame compatibility
BSA
Axis compatibility
Square-taper
Item number
15974315

General information

Manufacturer
Shimano
Category
Bottom brackets
Manufacturer no.
62.78669
Release date
20.4.2022
Sales rank in Category Bottom brackets
10 of 1285

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 length
123 mm

Origin

Country of origin
France, Germany

Voluntary climate contribution

CO₂-Emission
Climate contribution

Product dimensions

Axis length
123 mm
Weight
304 g

Package dimensions

Length
16.20 cm
Width
4.90 cm
Height
4.30 cm
Weight
300 g

30-day right of return
24 Months Warranty (Bring-in)
8 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
    0.2 %
  • 2.Shimano
    0.3 %

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
    3.4 %
  • 2.Shimano
    3.9 %
Source: Digitec Galaxus