Shimano BB-UN300 BSA bicycle bottom bracket EBBUN300B27B (EBBUN300B27B)

The Shimano BB-UN300 BSA bottom bracket provides a solid and precise connection between the crankset and frame, designed for bikes equipped with a BSA-threaded bottom bracket shell. The construction of this model ensures efficient power transfer and reliability in everyday use.

Optimisation for power transfer and stiffness

The Shimano BB-UN300 BSA model has been designed for effective torque transfer from the crankset to the drivetrain. The appropriately chosen bottom bracket increases the stiffness of the drivetrain, translating into better riding dynamics. Robust bearings guarantee smooth operation and reduce friction during intensive use.

Durability and longevity of components

In the production process of the Shimano BB-UN300 BSA bottom bracket, components have been selected for their resistance to loads typical of urban and touring cycling. Adequate sealing protects the interior of the unit from external contaminants. The proven Shimano design allows the user to maintain high operational standards over an extended period, even in challenging conditions.

Shimano BB-UN300 BSA bottom bracket - features:

• Compatibility with BSA-threaded bottom bracket shells;
• Precision-engineered threads ensuring installation stability;
• Robust construction designed for intensive use;
• Bottom bracket providing smooth and efficient power transfer;
• Resistance to loads during urban and trekking rides;
• Bearing system reducing friction over high mileage;
• Proper sealing protecting against dust and moisture;
• Designed for square cranksets compatible with Shimano;
• Universal application in MTB, trekking, and urban bikes;
• High-quality workmanship guaranteed by the Shimano brand.