FSA NS ACR -6°

Full Internal Integration. 3D-Forged Rigidity.

The engineering hallmark of the FSA NS ACR Stem is its Aerodynamic Cable Routing (ACR) system paired with an ultra-stiff, 4Bolt low-profile faceplate. Designed specifically to channel hydraulic lines and electronic control wires directly from ACR handlebars through the stem body and down into the headset steerer, it eliminates exposed housing without pinching lines or complicating steering rotation. Its rigid, box-section alloy construction resists twisting during all-out sprint launches and technical descents, providing direct, communicative handling feedback.

Why the FSA NS ACR Stem Belongs on Your Cockpit:

• Aerodynamic Cable Routing (ACR) System: Completely conceals brake hoses and shift wires inside the stem and headset for clean front-end aerodynamics and zero cable clutter.

• 3D-Forged & CNC-Machined 6061-T6 Alloy: Combines hollow-forged weight savings with uncompromising torsional stiffness for direct steering control under heavy cornering loads.

• Low-Profile 4Bolt Faceplate: Distributes clamping pressure evenly across 31.8mm carbon and alloy handlebars, protecting delicate layups while locking the bar firmly in place.

• Modern Race Geometry: Engineered with an aggressive -6° drop profile to optimize aerodynamic rider positioning across road race and gravel setups.

• Clean Aero Faceplate & Spacer Compatibility: Integrates seamlessly with dedicated ACR aerodynamic headset spacers and transition cones for a clean, factory-integrated look.

Technical Specifications:

• Material: 3D-Forged and CNC-Machined 6061-T6 Aluminum

• Steerer Clamp Diameter: 28.6mm (1-1/8")

• Angle: -6°

• Integration Standard: FSA ACR (Aerodynamic Cable Routing) Full-Internal System

• Hardware: Chromoly Steel Torx/Hex Bolts

The Alegro Perspective: Integrated cockpits can sometimes be a complete headache, but FSA’s ACR ecosystem is one of the cleanest and most reliable internal routing platforms on the market. The NS ACR stem gives you all the aerodynamic and aesthetic benefits of a one-piece carbon cockpit, but with the crucial adjustability of a two-piece bar and stem. It doesn't flex when you're wrenching on the bars in an all-out sprint, and the internal channels give hoses a smooth, friction-free bend down into the steerer tube.

Seamless Internal Routing. Monolithic Alloy Stiffness. Clean Your Cockpit with FSA.