The World's Largest Online Bike Store
    • FSA OS 99 CSI Road Stem

        • $138.49 - $139.99 138.49 139.99
        • RRP $264.99
        • Save Up To 48%
    • Select Colour
      Select Diameter
      Select Option
      Grey Decal
      Select Steerer Diameter
      Select Length

FSA OS 99 CSI Stem

Full Speed Ahead (FSA) produces world class bicycle components for road cycling, MTB, and Triathlon for World Tour teams, club riders and people who just love to ride their bikes. FSA has a long history in the sport of cycling and a strong heritage of innovation in design and manufacturing.


  • 3D Forged and CNC machined from AL2014
  • UD carbon weave skin applied through CSI process
  • 4 bolt sculpted AL2014 Alloy/Carbon faceplate
  • Titanium Hardware
  • +/- 6º x L80, 90, 100, 110, 120, 130mm
  • Ø31.8mm handlebar clamp
  • 41mm fork clamp stack height
  • UD Carbon finish
  • Color graphics options - Red, Black
  • Weight: 126 grams (100mm)

Buy from Chain Reaction Cycles, the World's Largest Online Bike Store.


  • Delivery costFREE
  • Delivers 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 fitted.

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


  • Colour: Black - Grey
  • Option: Grey Decal
  • Length: 110mm, 100mm, 120mm
  • Material: Carbon
  • Diameter: 31.8mm
  • Steerer Diameter: 1.1/8"

Stems Buying Guide

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

When buying Stems also consider...

Also Recommended...