5037-580 Shimano Tiagra SM-BB4600 Bottom Bracket 68mm BSA

$23.00
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5037-580
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Shimano’s mid-range Tiagra series takes many engineering cues from their pro-level components. This bottom bracket delivers sleek design at moderate cost.

  • Axle uses hollow tech II construction, 68mm
  • Splined crank arm mounts