• FSA OS-99 CSI Stem

        • $114.99 114.99
        • RRP $215.49
        • Save 47%
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FSA OS-99 CSI Stem

Forged and CNC-machined AL7050/T6 stem by Full Speed Ahead. FSA has a long history in the sport of cycling and a strong heritage of innovation in design and manufacturing.


  • 4-bolt sculpted faceplate
  • 6/4 Titanium hardware
  • Finish - Black anodized with flip-flop graphics
  • For 31.8mm handlebars
  • For 1.1/8" steerer tube
  • 35mm stack height
  • Sizes: +/-6º x 80, 90, 100, 110, 120, 130mm
  • Weight: 98g

Buy FSA Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.

  • Delivery costFREE
  • Delivery toUnited States of America
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
  • Pay by Bank Transfer, PayPal or Card


  • Colour: Black, Red
  • Length: 110mm, 120mm, 80mm, 100mm, 90mm, 130mm
  • Material: Carbon
  • Diameter: 31.8mm
  • Steerer Diameter: 1.1/8"

Interested in FSA Stems?

Stems Buying Guide

  • We've got everything you need to know in our buying guide.

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