SHIMANO BB-UN300 Bottom Bracket – 68 x 122.5mm – BSA – Square Taper

SHIMANO – 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