FSA OS-115 Stem — 120mm, 31.8mm Clamp, ±6°, 1-1/8" Threadless, Carbon Faceplate,
The FSA OS-115 is a stiff, lightweight threadless road stem with a cold-forged aluminium body and a 4-bolt carbon-fiber faceplate for secure, precise 31.8mm handlebar clamping.
Stiff, light alloy stem with a carbon faceplate — genuine FSA, brand new.
Will it fit? 120mm length, 31.8mm bar clamp, for 1-1/8" (28.6mm) threadless steerers, with a ±6° flip-flop rise. Fits 31.8mm road, gravel/CX or MTB bars. Not for 1" or 1-1/4" steerers or 25.4/26.0mm bars.
Key Specifications
Brand | FSA (Full Speed Ahead) |
Series | OS-115 |
Model | OS-115 |
MPN | 175-3320 |
UPC | 4710636251306 |
Type | Stem |
Length | 120mm |
Bar Clamp | 31.8mm |
Steerer | 1-1/8" (28.6mm) |
Rise | ±6° (flip-flop) |
Stack Height | 35mm |
Faceplate | 4-Bolt Carbon Fiber |
Material | AL2014/T6 Aluminium, cold-forged |
Hardware | Titanium |
Weight | 140 g (4.9 oz) |
Color | Black |
Country of Origin | Taiwan |
Condition | Brand new — original FSA retail packaging |
Technology Highlights
✓Cold-forged AL2014/T6 body for stiffness and low weight.
✓4-bolt carbon-fiber faceplate for secure bar clamping.
✓±6° flip-flop rise for fit tuning.
✓Titanium hardware throughout.
✓CNC-detailed for weight savings.
What's in the Box
1 × FSA OS-115 stem (120mm, 31.8mm)
4 × carbon faceplate bolts
Original FSA retail packaging
Brand new in retail packaging. Ships from Ontario, California (US domestic) · Estimated delivery 3–5 business days · Free 30-day returns.
