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FSA 1 (I/E)

FSA 1 (I/E)


The FSA 1 series has reducer top cups to fit tapered 1-1/8in/1.5in forks to 1.5in head tubes. Different height lower cups are available to fine tune bike geometry and riding position. Cups are alloy, with a sealed angular cartridge bearing at the top and a caged bearing at the bottom.


  • 1.5in / 1-1/8in, 36 degrees/45 degrees ACB upper
  • Retainer bearings lower
  • For 55mm OD headtube
  • For 1.5in to 1-1/8in tapered fork
  • Alloy upper cup and CNC machined lower cup
  • Upper: 36 degrees/45 degrees ACB (black seal)
  • Lower: diameter 7/32in x 20 retainer bearings


  • Stack Height 7.1+11.7=18.8mm
  • Weight: 150.8g