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

The new shape of the end caps facilitates disassembly and thus speeds up handling requiring disassembly

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

Fast Rolling Cross Country Directional Tread Design

The welded construction of the XR 391 and the bead blasted

Designed to carry two bottles or accessories off of one B-RAD base

SHIMANO BB-UN300-E E-Type Bottom Bracket - 68 x 122.5mm - BSA - Square Taper Compatio_Enriched The new shape 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