SHIMANO BB-UN300

Shimano BB-UN300 Square Spindle 68mm Bottom Brackets.

Note: Fixed gear framesets generally require 107mm spindle length.

Features: 

• Fits JIS square-taper cranksets
• Crankarm fixing bolts sold separately

Specifications:
Frame Interface: BSA/English Threaded
Spindle Interface: Square Taper JIS
Bottom Bracket Shell ID: 1.37
Shell Width: 68mm
Weight: 265g average

Click HERE to download User's Manual.