FSA NS ACR Stem 6-Degree

The FSA NS ACR Stem -6 Degree is a precision-engineered road stem designed for riders who want aerodynamic efficiency, solid strength, and clean cable integration. It features the Aerodynamic Cable Routing (ACR) system, allowing brake and shift cables to pass cleanly through the stem for reduced frontal drag and a neater cockpit setup.

Made from 6061-T6 aluminum with chromoly hardware, this stem balances performance and durability. The -6° angle provides a lower front-end position for aggressive riding, and it is available in multiple lengths to suit rider geometry and style—from tight, compact setups to larger reach builds.

NS ACR Stem Specs at a Glance

• Angle: -6°
• Clamp Diameter: 31.8 mm
• Steerer Tube Diameter: 1-1/8 in (28.6 mm)
• Available Lengths: 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm
• Material: 6061-T6 Aluminum body & faceplate; chromoly bolts
• Fork Clamp Stack Height: 30 mm
• Weight: ~235 g (for 100 mm length)
• Finish: Black anodized / bead-blasted
• Compatibility: Frames & headsets capable of ACR cable routing; fits common road or gravel bikes

Design Benefits

1. Sleek Cable Routing: ACR keeps cables tucked away, maintaining clean lines and reducing drag.
2. Adjustable Fit: Wide range of lengths and negative rise (-6°) allows fine tuning of cockpit height and reach.
3. Sturdy Construction: 6061-T6 aluminum delivers strength while keeping weight reasonable; chromoly hardware adds durability.
4. Low Profile Design: Smaller frontal area enhances aerodynamics without compromising stiffness.

Final Take

The FSA NS ACR Stem -6 Degree is ideal for riders looking to optimize their position, streamline cable routing, and build a sharp, performance-oriented cockpit. Whether for road racing, gravel, or fast group rides, it delivers both function and style in one versatile component.