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Shimano BB-UN300

Shimano BB-UN300
Color: Silver
Length: Select length
Model: Select model
Spindle: Square Taper
Width: 68mm
Please select options Unavailable
This item can be purchased online and picked up at your convenience.


- Simple and reliable square taper bottom bracket
- Replaces both BB-UN26 and BB-UN55
- Sealed cartridge bearings
- Cr-Mo axle
- For bicycles equipped with a chain case, select BB-UN300-K
- For E-type front derailleur compatibility, choose BB-UN300-E
- Fixing bolts not included; Shimano FC-E6000 bolts suggested

Part Numbers

Option UPC MPN Store SKU
Silver / 118mm / English / Square Taper / 68mm 192790619231 EBBUN300B18X BOT45843436A
Silver / 122.5mm / English/BB-UN300 D-NL / Square Taper / 68mm 192790619156 EBBUN300B22X BOT45387943A
Silver / 122.5mm / English/BB-UN300-LL123 / Square Taper / 68mm 192790619255 EBBUN300B23X BOT403964655