Shimano BB-UN300 Bottom Bracket - English 68 x 117.5mm Spindle Square Taper JIS

Upgrade your bike’s performance with the Shimano BB-UN300 Bottom Bracket, designed specifically for English 68 x 117.5mm spindle square taper JIS cranksets. Engineered for durability and smooth operation, this bottom bracket ensures a reliable connection between your crankset and frame, enhancing pedaling efficiency and ride quality.

• Compatible with JIS square-taper cranksets for seamless integration
• Crankarm fixing bolts sold separately, allowing customization
• Lightweight hollow spindle reduces overall weight without compromising strength