Shimano BB-UN300 Bottom Bracket - English 73 x 118mm Spindle Square Taper JIS

Upgrade your bike’s performance with the Shimano BB-UN300 Bottom Bracket, designed specifically for English 73 x 118mm spindle square taper JIS cranksets. Engineered for durability and smooth pedaling, this bottom bracket ensures a reliable and efficient connection between your crankset and frame.

• Compatible with JIS square-taper cranksets for seamless integration
• Requires crankarm fixing bolts (sold separately) for customizable installation
• Features a hollow spindle to reduce weight without compromising strength