STANDARD BOTTOM BRACKET, BB-UN300, SPINDLE: SQUARE TYPE, SHELL: BSA 68MM, SPINDLE: MM107, W/O FIXING BOLT

Description

* Simple and reliable square taper bottom bracket* Replaces both BB-UN26 and BB-UN55* Sealed cartridge bearings* Cr-Mo axle* For bicycles equipped with a chain case, select BB-UN300-K* For E-type front derailleur compatibility, choose BB-UN300-E* Fixing bolts not included; Shimano FC-E6000 bolts suggested