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Shimano BB-UN300 73mm Shell Square Taper Bottom Bracket - English Thread

Customer Reviews (3)

5 / 5| Write your review

£23.99

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£23.99 was

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SJS Cycles part number :

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Details

- A good quality bottom bracket for traditional chainsets
- Super-accurate bearings for smooth operation and improved durability
- Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting
- Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life
- Fast and easy installation without adjustment
- Narrow body allows clearance for cable routing under the bottom bracket

Product Reviews (3)

Questions & Answers (1) Q & A

Specification

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Product Reviews (3)

Overall Product Rating 5 / 5

Good quality

By Anthony

29 Apr 2025

5 / 5

I recommend this product

Replaced an old completely-shot bottom bracket to return an old bike to as-new condition.

Good service as always

By John Westwell

22 Oct 2024

5 / 5

I recommend this product

ConsNone

ProsDoes the job

SJS is very good at supplying older style components such as this square taper bottom bracket. Works exactly as you'd expect.

By hugh

15 Jul 2022

5 / 5

I recommend this product

Consnone

ProsStraightforward

Part arrived promptly and is top quality.

Questions & Answers (1)

cup material?

By Pavel

15 Aug 2020

are the cups on the UN300 made of aluminum or are they plastic, and what contributes to the lower cost versus the UN55 series of bottom brackets, please?

SJS Customer Service:

The cups on the UN300 are aluminium, not plastic.