BB-UN300 SHIMANO - Square Type Bottom Bracket - MTB - 73mm Shell 

The quality and performance-oriented Shimano BB-UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 73 mm shell width.

Specifications:

• A good quality bottom bracket for traditional chainsets
• Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting
• Better chainline stability with chain line stabilizer
• Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life
• Fast and easy installation without adjustment
• Narrow body allows clearance for cable routing under the bottom bracket
• Crankarm fixing bolts sold separately

Specifications:

• Model No : BB-UN300
• ItemCode : EBBUN300C23X
• Series : TOURNEY A070 Series
• Frame Interface: BSA/English Threaded
• Spindle Interface: Square Taper
• Bottom Bracket Shell ID: 1.37
• Shell Width: 73mm
• Spindle Lengths: 122.5mm