SHIMANO BB-UN300-E E-Type Bottom Bracket - 68 x 122.5mm - BSA - Square Taper Compatio_Enriched The welded construction of the

The welded construction of the XR 391 and the bead blasted

antibacterial

Fast Rolling Cross Country Directional Tread Design

compared to previous GP5000 versions

Equipped with mounts for whatever racks and packs you want to carry on your next overnight adventure

SHIMANO BB-UN300-E E-Type Bottom Bracket - 68 x 122.5mm - BSA - Square Taper Compatio_Enriched The welded construction of theSHIMANO Square Type Bottom Bracket MTB Standard Structure Square Type Bottom Bracket SHIMANO quality performance cartridge bearing square bottom bracket Better chainline stability with chain line stabilizer 3 structures available Standard, E type, chain case options Adapter material: Aluminum