The FSA Afterburner Lightweight Stem - 12 Degree delivers the perfect blend of strength, precision, and low weight for riders pushing the limits on technical trails. Designed for mountain bikers who demand confident handling and rock-solid reliability, this stem brings race-ready stiffness and trail-tested durability to every ride.
Crafted from forged aluminum, the Afterburner keeps weight down without compromising strength, giving riders a responsive connection between bar and fork that translates every input into confident control. The 12-degree rise offers a dialed-in fit for aggressive trail positioning and all-day comfort.
Forged aluminum construction for the ideal balance of stiffness, strength, and low weight.
12-degree rise provides versatile fit options for fine-tuned cockpit setup.
Trail-proven durability for riders who charge hard through technical terrain.
Clean, refined design that complements any modern mountain bike cockpit.
Whether climbing steep switchbacks or carving descents, the FSA Afterburner Lightweight Stem keeps control precise and confidence high—exactly what every serious trail rider needs.
Specifications & Identifiers
Bar Clamp
31.8mm
Color
Black
Defined Color
Black
Length - Stems
100mm, 120mm, 60mm, 70mm, 80mm, 90mm
Material
6061-T6 Aluminum
Steerer Tube
1-1/8" Threadless
Stem Angle (deg)
-12 Deg, 12 Deg
Weight
128
Black - 100mm UPC
840031002747
Black - 100mm MPN
175-0015067090
Black - 120mm UPC
840031002761
Black - 120mm MPN
175-0015069090
Black - 70mm UPC
840031002716
Black - 70mm MPN
175-0015064090
Black - 80mm UPC
840031002723
Black - 80mm MPN
175-0015065090
Black - 90mm UPC
840031002730
Black - 90mm MPN
175-0015066090
Tree Fort ID:
333222473890
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