Shimano, BB-UN300 D-NL, Square Taper BB, British, 73mm, : 122.5mm, Silver

Shimano BB-UN300 Square Taper Bottom Bracket
A durable and reliable bottom bracket for smooth pedaling performance.

• Replaces both BB-UN26 and BB-UN55
• Sealed cartridge bearings for longevity and low maintenance
• Cr-Mo axle for enhanced strength and durability
• BB-UN300-K version available for bikes with a chain case
• BB-UN300-E version compatible with E-type front derailleurs
• Fixing bolts not included (Shimano FC-E6000 bolts recommended)