Product details
The Euro SHIMANO BB-UN300 cartridge bottom bracket is designed for young riders and features a square steel axle according to JIS standards, compatible with cranks of the same standard. It has sealed bearings for smooth, sealed pedaling. It is only suitable for frames with internal threads designed to accommodate Euro BSA/BSC type bottom brackets.
Features:
- Type: Euro cartridge
- Shell diameter: 34.5 mm
- Axle: Square JIS
- Axle length: 113 or 118 mm
- Thread: BSA/BSC
- Width: 68 mm
- Sealed bearings
- Weight: 290 g
- Sold with 2 axle screws.
Compatibility:
- For frames with Euro BSA/BSC bottom bracket
- For cranks with JIS square axle.
Axis diameter | 34.50 mm |
Frame compatibility | T47 |
Axis compatibility | 25mm K-Type |
Box width | 68 mm |
Item number | 57445954 |
Manufacturer | Shimano |
Category | Bottom brackets |
Manufacturer no. | SHIBOBR020 |
Release date | 6.4.2025 |
Colour | Black |
Exact colour description | Black/Silver |
Bottom bracket design | Pressed bearing shells |
Frame compatibility | T47 |
Axis compatibility | 25mm K-Type |
Box width | 68 mm |
Axis diameter | 34.50 mm |
Axis length | 118 mm |
Country of origin | France |
CO₂-Emission | |
Climate contribution |
Axle diameter | 34.50 mm |
Weight | 290 g |
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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.Shimano0.2 %
- 1.Sram0.2 %
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- ShimanoNot enough data
- SramNot enough data
Unfortunately, we don't have enough data for this category yet.
Return rate
How often is a product of this brand in the «Bottom brackets» category returned?
Source: Digitec Galaxus- 1.Sram2.9 %
- 2.Shimano3.5 %