Shimano BB-UN300 Bottom Bracket - English 68 x 122.5mm Spindle Square Taper JIS 47.5mm Chainline

Upgrade your bike's performance with the Shimano BB-UN300 Bottom Bracket, designed for reliable and smooth pedaling. Featuring an English 68 x 122.5mm spindle with a Square Taper JIS 47.5mm chainline, this bottom bracket ensures compatibility with a wide range of cranksets for seamless integration.

• Precisely fits JIS square-taper cranksets for optimal power transfer
• Crankarm fixing bolts are sold separately, allowing customization
• Durable hollow spindle construction reduces weight without sacrificing strength

Experience enhanced drivetrain efficiency and long-lasting durability with Shimano's trusted engineering, making it an essential upgrade for cyclists seeking dependable performance.