Afterburner Light Weight Stem
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Afterburner Lightweight Stem delivers XC precision with a stiff, low-profile build
Whether we're powering through cross-country laps or linking technical trail sections, the FSA Afterburner Lightweight Stem gives us the stiffness and precision we expect from a top-tier cockpit component. It's designed for riders who want responsive handling and reliable strength—without the bulk.
3D-forged and CNC-machined from aluminum, the Afterburner offers high strength at a low weight, ideal for XC and aggressive trail setups. The 0-degree rise keeps our cockpit low and aggressive, helping us stay centered and in control when speed matters most. Paired with a carbon or alloy bar, it brings clean aesthetics and dependable performance to any lightweight build.
Details
- Lightweight stem optimized for XC, trail, and all-mountain use
- 0-degree rise creates a low, aggressive cockpit profile
- 3D-forged, CNC-machined aluminum construction for strength and precision
- Fits 31.8mm handlebars and 1 1/8in steerer tubes
- Secure 4-bolt faceplate enhances bar stiffness and control
- Great for weight-conscious riders chasing speed and efficiency
- Item #FSAD14L
- Material
- 7050 aluminum, 3D forged and CNC machined
- Steer Tube Diameter
- 1 1/8in
- Length
- 35mm, 40mm, 50mm
- Rise
- 0 degree
- Clamp Diameter
- 31.8mm
- Claimed Weight
- 3.2oz (91g)
- Stack
- 34mm
- Bar Attachment
- 4-bolt
- Includes
- chromoly mounting hardware
- Activity
- cross-country, gravel
Reviews
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Overall Rating
2 based on 1 ratings
Review Summary
Fits True To Size
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Selecting an option will reload the available reviews on the pageMay 11, 2025
Defective bolt
- Familiarity:
- I've used it once or twice and have initial impressions
It’s fine for a lightweight stem, but FSA seemed to have skimped on bolt quality. I broke one as I was torquing it to spec at 6Nm (it broke at 4Nm). I had to drill out the broken bolt and luckily I had an extra one lying around that fit. If I hadn’t had an extra, this would have been a return for a defective item. Hopefully BC can send me a replacement bolt that matches the others.
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