Prologo Choice Integrated Aero Road Nack Saddle 140mm

Prologo Choice Integrated Aero Road Nack Saddle 140mm.

Prologo Choice – First Integrated Aero Road Saddle with Hidden Nack Carbon Rail

The Prologo Choice is a landmark product in road cycling — the world's first fully integrated racing saddle engineered to minimize aerodynamic drag at every level. Developed with CFD simulation software and refined in a wind tunnel, the Choice redefines what a high-performance road saddle can be, combining elite aerodynamics, next-generation materials, and unprecedented modularity in a package weighing just 152 grams.

Aerodynamics First — Engineered Like Formula 1

In a sport where frame geometries, componentry, and rider positions are increasingly shaped by aerodynamic principles, the Choice saddle was designed to match that philosophy from the ground up. Its futuristic profile was developed using advanced CFD simulation and validated in wind tunnel testing, achieving aerodynamic drag coefficients previously unseen in a production road saddle. The result is a component that works with your bike's aero system — not against it.

Hidden Rail. Lateral Side Wings. Zero Drag Profile.

The defining visual and functional feature of the Choice is its fully concealed Nack (nano carbon fiber) rail, shielded on both sides by sinuous lateral wings that redirect frontal airflow toward the rear of the saddle. This integrated rail design eliminates the aerodynamic penalty of exposed rail geometry, while the reduced stack height and optimized rail-to-base connection deliver greater structural stiffness — translating directly into more efficient power transfer and precise handling on technical descents and demanding sections.

Comfort Without Compromise

Shape development went beyond aesthetics. Prologo's proprietary Pressure Map MyOwn system guided the ergonomic geometry, with a central PAS channel to relieve pressure peaks in the perineal zone. Variable-density next-generation foam provides the ideal balance between support and comfort at high speeds, allowing riders to hold an aggressive aerodynamic position for longer without fatigue. Available in two widths — 140mm (narrow) and 147mm (wide) — to match individual sit bone measurements and riding style.

Modular by Design. Sustainable by Choice.

For the first time in a saddle of this caliber, the rail can be separated from the carbon shell using just two screws. If a rail or shell is damaged, only the affected component needs to be replaced — not the entire saddle. This modularity introduces a more sustainable, cost-effective approach to high-end saddle ownership without compromising structural integrity, performance, or weight.

Technical Specifications

• Narrow Version: 240 × 140 mm | 152g
• Wide Version: 240 × 147 mm | 172g
• Shape: Semi-round T-shape
• Rail: Nack (nano carbon fiber), 7 × 9 mm diameter
• Pressure Relief: Central PAS channel
• Aerodynamic Development: CFD simulation + wind tunnel validated
• Ergonomics: Pressure Map MyOwn system
• Modularity: Rail separates from carbon shell with 2 screws
• Torque Setting (rear plate screws): 1.3 Nm min — 1.5 Nm max