The Shimano BB-UN300 is a high-quality bottom bracket designed for reliable performance and durability. With a shell width of 68 mm and an axle length of 122.5 mm, this bottom bracket offers an optimal fit for BSA frames. The square bottom bracket axle ensures a stable connection between the cranks and the frame, enhancing pedaling efficiency. The product comes in a self-service package, making installation easier. Made from robust aluminum, the BB-UN300 is suitable for both standard and E-Type applications, providing a versatile solution for various types of bicycles. The threaded bearing cups ensure easy maintenance and a secure fit in the frame. This bottom bracket is ideal for cyclists who value quality and performance.

• High-quality aluminum construction for durability
• Compatible with BSA frames for versatile applications
• Easy maintenance with threaded bearing cups
• Optimal stability through the square bottom bracket axle.