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Shimano BB-UN300

Shimano BB-UN300
$15.99 - $24.99
Color: Silver
Length: Select length
Width: Select width
Model: English
Spindle: Square Taper
Please select options Unavailable
This item is not permitted to be shipped unassembled, however, it can be purchased online and delivered assembled within 20 miles of our shop free of charge.


- 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 / 115mm / English / Square Taper / 68mm 192790619187 EBBUN300B15B STA82544041T
Silver / 118mm / English / Square Taper / 68mm 192790619231 EBBUN300B18X STA81165227T
Silver / 122.5mm / English / Square Taper / 73mm 192790622194 EBBUN300C23X