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Shimano BB-UN300 Square Taper BSA Bottom Bracket
- Ordered before 22:00, delivered tomorrow
- Free tracked shipping over € 49,-
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Try in store
A large part of our assortment is in stock in our stores and ready to try, fit, and experience without an appointment.
Our full assortment is available online. You can order and pay for products online and have them delivered for free to one of our Superstores. This way, you can try everything out. Not satisfied? You can return it to the store free of charge and receive a refund.
Pros & Cons
Pros & Cons
- This bottom bracket is easy to install yourself.
- The bearings rotate smoothly and have a good durability.
- This bottom bracket is on the heavy side.
Specifications
Specifications
| Brand | Shimano | |
| Types Screw Thread | BSA | |
| Suitable for | Race / MTB | |
| Crankset axle fit | Square Taper | |
| Bottom Bracket Diameter | 33.6-33.9 mm |
High quality and performance
This Shimano BB-UN300 square axle bottom bracket in the Alivio range has a very strong and durable design, allowing you to transfer power to your wheels with as little resistance as possible. The axle is made of steel and the bearings are well sealed. This makes this bottom bracket durable and low-maintenance!
Bottom bracket with square axle
High-performance SHIMANO bottom bracket with square axle
Greater chainline stability with chainline stabiliser
3 structures available
Options: stand, E-type, chain guard
Bracket material: aluminium
Reviews
Reviews
Most recent reviews
5 / 5
Price quality and fast delivery, what more could you want?
Great quality , will last for years to come. Replaced 25-year-old with this one. With the right tools, you'll have it back in in no time.
Pros & Cons
4 / 5
Top product
Was able to replace the bottom bracket easily. Be careful when measuring the old bottom bracket though so you order the right one.
Pros & Cons
5 / 5
Excellent
Everything according to the offer
Pros & Cons
5 / 5
Just an excellent bottom bracket bearing
Quality bottom bracket bearing. Used this on an Alpina children's bike. Much better bottom bracket bearing than was originally on the bike.
Pros & Cons
5 / 5
good price/quality
This bottom bracket was easy to install and I like it very much. Good replacement for a worn-out bottom bracket.
Pros & Cons
5
Price quality and fast delivery, what more could you want?
Great quality , will last for years to come. Replaced 25-year-old with this one. With the right tools, you'll have it back in in no time.
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Does what it needs to do
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Price / quality is super
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Replaces old 20-year-old Shimano BB
Frequently bought together
Frequently bought together
Recommended by the product specialist
Recommended by the product specialist
Related product
Related product
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| Shimano BB-UN300 | Sunrace BSA 68/122mm Steel | |
| 25 reviews | 1 review | |
| Types Screw Thread | BSA | BSA |
| Suitable for | Race / MTB | |
| Crankset axle fit | Square Taper | Square Taper |
| Bottom Bracket Width | 68 / 113 mm / 68 / 122 mm / 68 / 127 mm / 68 / 110 mm / 68 / 118 mm / 73 / 113 mm / 73 / 118 mm / 73 / 122 mm | 68 / 122 mm |
| Bottom Bracket Diameter | 33.6-33.9 mm | |
| - | Yes / No | |
| 16,95 | 12,95 | |
| This product | View product |