Prologo K3 STN Road Saddle – Black.

Prologo K3 STN – Reliable Road Comfort with Classic Prologo Performance.

The Prologo K3 STN is a versatile road saddle designed to deliver dependable comfort, support, and durability for everyday riding, training, endurance use, and recreational road cycling. With its traditional elongated profile and supportive rear section, the K3 offers a familiar riding position for cyclists who prefer a more conventional saddle shape over today's ultra-short racing designs.

Widely used as original equipment on performance road bikes, the K3 combines Prologo's established ergonomic approach with durable STN rails, making it an excellent choice for riders looking for proven performance at an accessible price point. The K3 STN appeared as original equipment on several production road bikes from brands such as Orbea and Eddy Merckx.

Traditional Shape — Freedom to Move

Unlike modern short-nose saddles that encourage a more fixed riding position, the K3 uses a longer, traditional profile that gives the rider more room to shift forward or backward depending on terrain and effort.

This makes it particularly well suited to riders who naturally change position during longer rides, move forward during harder efforts, or sit farther back when climbing and cruising.

Supportive 141mm Platform

With an approximately 141 mm-wide seating area, the K3 provides a balanced platform that combines support with sufficient freedom of movement. This width was specifically listed on several bicycles originally equipped with the K3 STN, including Orbea Avant models.

The gently shaped rear section helps distribute pressure across the sit bones while maintaining a streamlined profile appropriate for road riding.

Comfort-Oriented Padding for Everyday Miles

The K3's padded construction places a greater emphasis on everyday comfort than Prologo's ultra-light racing saddles.

That makes it particularly attractive for recreational riders, endurance cyclists, commuters, or anyone who values cushioning and durability over achieving the absolute lowest possible saddle weight.

STN Rails — Durable and Dependable

The STN rail system is designed as a strong and cost-effective rail platform suited to everyday riding. It prioritizes durability and mechanical reliability, making the K3 a practical choice for training bikes, endurance builds, commuters, or riders replacing an original-equipment saddle.

The K3 STN was used by multiple manufacturers as OEM equipment, including Orbea, Eddy Merckx, and Kestrel.

A Proven Saddle at an Exceptional Value

The K3 occupies a different place in Prologo's range than high-end Nack or Tirox racing saddles. It isn't designed to chase every last gram. Instead, it delivers a straightforward combination of Prologo ergonomics, comfortable padding, strong rails, and proven road-bike compatibility.

For riders who simply want a dependable Prologo saddle without paying for exotic materials, the K3 STN remains a very compelling option.

Technical Specifications

• Intended Use: Road / Endurance / Recreational Cycling
• Saddle Width: Approx. 141 mm
• Shape: Traditional elongated road saddle
• Rail: STN
• Padding: Comfort-oriented padded construction
• Riding Style: Suitable for riders who prefer freedom to move fore and aft
• Color: Black with red accents
• Construction: Durable performance-oriented design