FSA OS-99 CSI Stem


Save £83.96
RRP £169.95 *

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  • Description
  • Specification
  • Reviews
  • Delivery Options
  • Help & Advice
  • Buying Options
  • FSA OS-99 CSI Stem Product Description

    The FSA OS-99 CSI Stem is constructed with a Carbon Structural Integration (CSI) process that bonds carbon to alloy permanently for superior strength and durability. This enhances vibration dampening properties that will deliver a more comfortable ride. This stem offers an excellent resistance from stress corrosion cracking and creep propagation cracking which gives it extra longevity to resist all impacts from riding.

    FSA OS-99 CSI Stem Features and Benefits

    • Made with 3D forged and CNC machined from AL2014
    • Has a 3K carbon weave skin applied through CSI process
    • Features a 4 bolt sculpted AL2014 alloy/carbon faceplate
    • Has a trusty titanium hardware
    • Handlebar clamp: 31.8mm
    • Fork clamp stack height: 41mm
    • Has flip flop colour graphics
    • Weight: 122g (110mm)
  • Colour: Black
    Discipline: Road
    Material: Carbon
    Type: Stems
  • Rated 4 out of 5 by 1 reviewer.
    Rated 4 out of 5 by Good looking stem Easy to fit, light weight and great looking. A bit pricey though. 26 May 2013
    • 2016-10-27 T11:41:17.779-05:00
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  • Standard Delivery

    Standard Delivery

    FREE Standard Delivery on all orders over £30 ( Halfords products only ) - £2.99


  • You can buy this product from one of our carefully selected Approved Partners. The full list of options available are below. Simply add your chosen option to your basket and proceed to checkout when you're ready.

    You can purchase products supplied by Halfords and selected other suppliers on halfords.com.

    Checkout is always via halfords.com and all payment will be taken via halfords.com. In checkout the products will be split into separate deliveries for each supplier.

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    Price Seller Info Purchase

Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

FSA Headsets & Stems

FSA OS-99 CSI Stem

£85.99 FSA OS-99 CSI Stem delivers high strength and superb durability thanks to its robust carbon fibre and aluminium construction.