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Shimano Standard Bottom Bracket, BB-UN300, Spindle: Square Type, Shell: BSA 73mm, Spindle: 122.5mm (D-NL), w/Fixing Bolt

$15.99
Shimano BB-UN300 Square Taper bottom bracket for cranks with JIS Square Taper mounting. Suitable for frames with BSA thread 73 mm housing width.

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Shimano BB-UN300 Square Taper bottom bracket for cranks with JIS Square Taper mounting. Suitable for frames with BSA thread 73 mm housing width.

- 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

Product features - Shimano BB-UN300 Square Taper 73mm BSA Bottom Bracket

  • Model: BB-UN300
  • BB-Type: Square Taper
  • Threaded: BSA
  • Threaded BB shell width: 73mm
  • Axle Length: 122.5mm
  • Material: Steel
 
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