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Shimano BB-UN55 Cartridge Bottom Bracket

Item: SH-BBUN55
$23.49
Size:
73X110MM
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The UN55 bottom bracket is an improvement over the tried and true UN54. The sealed cartridge unit makes a great replacement part for hybrids, road bikes and older mountain bikes. The sealed cartridge bearings lock out contaminants like water and dirt, helping this bottom bracket last longer.
  • Maintenance-free sealed cartridge bearings with high-efficiency rubber seals
  • Square taper chromoly spindle
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