CeramicSpeed PF4630 Bottom Bracket - Black

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Specifications

  • Designed for high-stiffness, lightweight 30mm spindles and 46mm inner diameter bottom bracket shells.
  • Telescoping spacer and extended cup design enhance frame sealing and system stiffness across varying shell widths.
  • Standard bearings reduce drag by 75% compared to conventional BBs, with just 0.3–0.4 watts of drag per set.
  • Hardened-steel races and ceramic balls ensure bearings last at least 3 times longer than typical options.
  • Ships with All Round Grease, with Race Day for lowest drag and Long Life for maximum durability available as alternatives.
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