Shimano BB-UN300 square taper bottom bracket including crank bolts
Item number: 296912
Product Description
Bottom bracket BB-UN300 by Shimano for versatile cycling styles
The Bottom bracket BB-UN300 by Shimano is designed for City & Touring, MTB, Road, All Mountain, and Cross Country applications, offering reliable performance across various cycling disciplines. This bottom bracket features a sturdy steel axle with a square taper (JIS) design, ensuring compatibility with many cranksets. Its steel bottom bracket cups provide durability, while the plastic sleeve helps reduce friction and wear. The package includes crank bolts for easy installation. Whether you’re upgrading or replacing your bottom bracket, this component supports smooth pedaling and efficient power transfer. It suits riders looking for a dependable part that balances quality and practicality. The BB-UN300 is a solid choice for maintaining your bike’s drivetrain performance.
The Bottom bracket BB-UN300 by Shimano is designed for City & Touring, MTB, Road, All Mountain, and Cross Country applications, offering reliable performance across various cycling disciplines. This bottom bracket features a sturdy steel axle with a square taper (JIS) design, ensuring compatibility with many cranksets. Its steel bottom bracket cups provide durability, while the plastic sleeve helps reduce friction and wear. The package includes crank bolts for easy installation. Whether you’re upgrading or replacing your bottom bracket, this component supports smooth pedaling and efficient power transfer. It suits riders looking for a dependable part that balances quality and practicality. The BB-UN300 is a solid choice for maintaining your bike’s drivetrain performance.
Product Specifications:
- Application:
- All Mountain, Cross Country, MTB, Road, City & Touring
- Axle Type:
- Square Taper (JIS)
universal | BSA:
- Axle Length:
- 115mm
universal | BSA:
- Axle Length:
- 127mm
universal | BSA:
- Axle Length:
- 122,5 mm
Technical Information:
- Axle Material:
- Steel
- Bottom Bracket Cup Material:
- Steel
- Bottom Bracket Sleeve Material:
- Plastic
universal | BSA:
- Bottom Bracket Standard:
- BSA
universal | BSA:
- Bottom Bracket Standard:
- BSA
universal | BSA:
- Bottom Bracket Standard:
- BSA
Product Features:
- Versatile bottom bracket BB-UN300 with square taper axle, perfect for city, touring, MTB, road, all mountain, and cross country bikes
- Durable steel axle and bottom bracket cups ensure long-lasting performance and reliability
- Plastic bottom bracket sleeve reduces friction for smooth pedaling efficiency
- Includes crank bolts for easy installation and secure fit
- Compatible with JIS square taper cranksets, offering broad compatibility across multiple bike types
Manufacturer Number:
- universal | BSA: EBBUN300B15B
- universal | BSA: EBBUN300B27B
- universal | BSA: EBBUN300C22B
Contents:
- 1 x Shimano BB-UN300 square taper bottom bracket
- 2 x Shimano hexagon head crank bolt
Manufacturer:
Shimano Europe B.V.
High Tech Campus 92
5656 AG Eindhoven
Netherlands
info@shimano-eu.com
High Tech Campus 92
5656 AG Eindhoven
Netherlands
info@shimano-eu.com










