Shimano BB-UN300-K Bottom Bracket - English 68 x 127.5mm Spindle Square Taper JIS For Chain Case

Upgrade your bike's performance with the Shimano BB-UN300-K Bottom Bracket, designed for reliable and smooth operation. This bottom bracket features a precise English 68 x 127.5mm spindle with a Square Taper JIS interface, making it ideal for compatible cranksets and chain cases. Engineered for durability and efficiency, the hollow spindle design reduces weight without compromising strength, enhancing your pedaling power and overall ride quality.

• Compatible with JIS square-taper cranksets for seamless integration
• Crankarm fixing bolts are sold separately, allowing customization
• Lightweight hollow spindle optimizes performance and durability

Experience improved drivetrain efficiency and enhanced bike responsiveness with Shimano’s trusted engineering. Perfect for cyclists seeking reliable replacement parts or upgrades, this bottom bracket ensures long-lasting performance on every ride.