FSA OS-99 OS-99 CSI Stem
Lists today at $215
Own a FSA OS-99 OS-99 CSI Stem?
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What a used one is worth
New
$215
$183 to $215
Like new
$204
$174 to $215
Excellent
$194
$164 to $213
Good
$161
$137 to $177
Fair
$118
$101 to $130
For parts
$65
$55 to $71
From the current list price, adjusted for condition. Guidance from our catalog, not an appraisal.
Overview
- Brand
- FSA
- Series
- OS-99
- Model
- OS-99 CSI Stem
- Model number
- 175-0316BKG to 175-0323BKG
- Type
- Stem
- Years
- up to 2026
- Current list price
- $215 (as of 2026-09)
Compatibility
- Steerer
- 1_1_8
- Bar clamp
- 31.8
Specifications
- Tech
- Carbon Structural Integration (CSI)
- Alloy
- 2014, 3D forged and CNC machined
- Category
- road
- Material
- aluminum with carbon
- Rise deg
- -6, 6
- Weight g
- 125
- Length mm
- 60, 70, 80, 90, 100, 110, 120, 130
- Weight basis
- 100 mm
- Stack height mm
- 41
The live FSA site refuses automated requests, so this entry was built from web.archive.org captures of the FSA shop. Fixed 2026-09-27: list_price_usd is now $215, the regular price on FSA USA's own store (fsaproshop.com under the name K-Force OS-99 Stem, same part numbers 175-0316BKG to 175-0323BKG, read September 2026), replacing $186 from FSA's international shop (November 2025 capture), which sends US buyers to the US store, so that figure is kept in notes only under the US price venue rule.