Prologo Nago R4 Nack 137mm road bike saddle

Evolving from a legendary model, the Prologo Nago R4 Nack embodies the new generation of high-performance saddles, developed for demanding cyclists. Inspired by the original NAGO – winner of the Giro and numerous Classics – this R4 version features a completely redesigned shape based on the latest MyOwn biomechanical analyses to offer a perfect balance between support, lightness and pedalling efficiency. Narrow (137 mm), it is designed for cyclists with a narrow pelvis seeking a technical and efficient saddle for long distances. Its ergonomic, semi-circular T-shape is perfectly suited to cyclists with average pelvic flexibility. The saddle is designed with three independent zones of varying density to adapt to all phases of the pedal stroke, whilst minimising pressure points thanks to the integrated Active Base system.

The Nack nano-carbon rail offers extreme stiffness and ultra-lightweight construction for those seeking pure performance, ideal for absorbing road vibrations.

Technical specifications

- Dimensions: 245 x 137 mm
- Weight with Nack rail: 142 g
- Shape: Semi-circular – ideal for cyclists with average flexibility
- Design: 3 independent zones with variable density for targeted comfort
- System: Active Base – perforated base for pressure relief
- Base: Long-fibre carbon – balance between stiffness and comfort
- Nack rail: Nano Carbon Fibre (carbon, Kevlar, aluminium) – extremely lightweight
- Use: Road – long distance, training, competition
- Colour: Black
- Brand: Prologo