FSA Afterburner Stem
Best lightweight upgrade for mountain bikers seeking reliable steering precision.
A lightweight, precision-engineered component designed to stiffen the cockpit for aggressive cross-country and trail riding. It trades adjustability for a fixed, low-profile geometry that keeps the rider centered and efficient on technical terrain.
$56.35
at
Backcountry
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FSA Afterburner Stem
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Who it's for
- Weight-conscious trail riders needing a reliable and sturdy component
- Cross-country racers seeking maximum steering precision and power efficiency
- Mountain bikers who want to fine-tune their cockpit ergonomics
Who should skip it
- Custom bike builders prioritizing flashy or premium visual flair
- Endurance riders sensitive to hand fatigue on long, bumpy descents
- Elite weight-weenies looking to shave every possible gram
Performance breakdown
Weight Efficiency
At 91 grams, it sheds critical weight without sacrificing structural integrity.
Steering Precision
The 4-bolt faceplate design eliminates flex during aggressive technical maneuvers.
Build Quality
CNC-machined 7050 aluminum offers a premium, durable finish for demanding trails.
Cockpit Aggression
Zero-degree rise creates a low, forward-leaning position for optimal control.
Installation Ease
Standardized hardware makes swapping or adjusting your cockpit setup straightforward.
Versatility
Adapts seamlessly across XC, gravel, and trail riding disciplines.
Key Specs
Material
7050 aluminum, 3D forged and CNC machined
Steer Tube Diameter
1 1/8 inches
Stem Length
35mm, 40mm, 50mm
Stem Angle
0 degrees
Handlebar Clamp Diameter
31.8mm
Weight
91 grams
Stack Height
34mm
Faceplate
4-bolt
Hardware
Chromoly
Intended Use
Cross-country, gravel, trail
Know before you buy
Still have a question?
Ask Metto anything about the FSA Afterburner Stem before you decide.
