FSA V-Drive MTB Stem – 80mm, 31.8 Clamp, +/-17°, 1-1/8"
The FSA V-Drive MTB Stem is a durable, no-nonsense cockpit upgrade designed for mountain and trail bikes. With a 3D forged and CNC-machined aluminum body, it delivers reliable stiffness and fit adjustment through a reversible +/-17° angle.
Key Functional Details
- 80mm stem length for balanced MTB cockpit positioning
- +/-17° reversible angle for fit tuning (rise or drop)
- 31.8mm handlebar clamp (modern standard)
- 1-1/8" steerer tube compatibility
- 3D forged and CNC machined AL6061/T6 aluminum body
- 4-bolt faceplate for secure handlebar clamping
- Chromoly hardware for durability
- 40mm stack height at steerer clamp
Technical Specifications
| Brand | FSA (Full Speed Ahead) |
| Model | V-Drive MTB Stem |
| Length | 80mm |
| Bar Clamp Diameter | 31.8mm |
| Steerer Tube Diameter | 1-1/8" |
| Angle | +/-17° |
| Material | AL6061/T6 Aluminum |
| Stack Height | 40mm |
| Hardware | Chromoly |
| Color | Black |
| UPC | 840031054111 |
Compatibility & Technical Notes
Good Fit:
- Mountain, trail, and hybrid bikes with 1-1/8" threadless steerers
- Handlebars with 31.8mm clamp diameter
- Riders adjusting reach or stack height with stem angle flip
Not A Fit:
- 35mm handlebar clamp systems (incompatible)
- Older 25.4mm or 26.0mm handlebars
- Tapered steerer confusion (this fits the top 1-1/8" section only, which is standard)
This stem uses the modern 31.8mm handlebar standard and fits standard threadless headsets with a 1-1/8" steerer.
Service / Ownership Context
Installation requires proper torque on both steerer clamp bolts and faceplate bolts. Always tighten in a cross-pattern and follow torque specs to avoid bar slippage or damage. Angle can be flipped during install to raise or lower handlebar position.
Fit & Use Signals
- Good for riders dialing in fit on MTB or hybrid bikes
- Useful for increasing comfort (positive rise) or aggressive positioning (negative drop)
- Common replacement for OEM stems on entry to mid-level bikes
Biggest issue is clamp mismatch—customers often don’t know if they have 31.8 or 35mm bars. Verify before selling. The +/-17° angle is more aggressive than most OEM stems (~6°), so flipping it can significantly change fit—good for solving fit issues without new bars. Watch stack height: at 40mm, it may affect spacer setup on shorter steerers. Always recommend a torque wrench—over-tightening faceplate bolts can crush lightweight handlebars. Upsell opportunity: new bars if customer is upgrading cockpit, or headset spacers for fit adjustments.