Prologo Dimension R2 AGX Tirox Gravel Saddle- Options

Prologo Dimension R2 AGX Tirox Gravel Saddle.

Prologo Dimension R2 AGX – Performance, Control and Comfort Built for Gravel

The Prologo Dimension R2 AGX takes one of the brand's most proven performance saddle platforms and adapts it specifically for gravel, all-road, adventure, and cyclocross riding. Combining the Dimension family's compact V-shape profile with increased cushioning, enhanced grip, and vibration-damping Tirox rails, the R2 AGX delivers the support and stability needed when fast riding moves beyond smooth pavement.

AGX Performance — Engineered for Rougher Roads

AGX stands for Adventure, Gravel and Cyclocross — Prologo's saddle platform developed to balance race-level efficiency with the additional comfort required on broken pavement, gravel roads, and extended off-road rides.

Compared with road-focused designs, the Dimension R2 AGX uses a more compliant base and additional next-generation foam to better absorb vibrations and impacts without sacrificing the support required for efficient power transfer.

V-Shape Ergonomics for a Stable, Forward Riding Position

The Dimension R2 AGX features Prologo's characteristic V-shaped geometry with a flat profile and an advanced anatomical center. This design helps reduce unnecessary movement on the saddle and encourages a stable, slightly more forward position — ideal for riders with good pelvic flexibility and an aggressive riding style.

A redesigned 40 mm-wide nose provides additional support when moving forward during hard accelerations, steep climbs, or high-power efforts, while its rounded profile improves comfort in more dynamic riding positions.

3D Slide Control — More Grip When the Terrain Gets Loose

Prologo's 3D Slide Control surface technology is designed to increase grip between the rider and saddle. The textured upper helps maintain a consistent position when riding across uneven gravel, technical terrain, or repeated accelerations — reducing unwanted sliding while allowing the rider to remain properly supported through the pedal stroke.

PAS Pressure Relief for Long-Distance Comfort

At the center of the saddle, Prologo's PAS (Perineal Area System) uses an open central channel to reduce pressure peaks and compression in sensitive areas. By helping relieve soft-tissue pressure and improve comfort around the pelvic zone, the PAS design is particularly valuable during long gravel rides where changing surfaces and sustained seated efforts can amplify discomfort.

Tirox Rails — Performance with Added Vibration Absorption

This version of the Dimension R2 AGX uses Prologo's Tirox rail system, manufactured from lightweight alloy steel. Tirox provides an excellent balance of strength, stiffness, weight, and vibration absorption — making it especially well suited to gravel and all-road applications.

The Tirox version is paired with an injected-carbon base engineered to maintain efficient support while offering the compliance needed for rougher terrain.

Two Widths. Two Levels of Support.

The Dimension R2 AGX is available in 143 mm and 153 mm widths, allowing riders to select the platform that best matches their anatomy and preferred level of support.

The 143 mm version offers a compact, performance-oriented fit with additional cushioning for gravel riding. The 153 mm version provides a broader support area for riders with wider sit-bone spacing or those seeking improved weight distribution and greater long-distance comfort. It also receives additional rear foam padding for increased cushioning over rough terrain.

Technical Specifications

• Use: Gravel / All-Road / Adventure / Cyclocross
• Shape: Flat V-shape
• Available Sizes:
  • 245 × 143 mm
  • 245 × 153 mm
• Rail: Tirox lightweight alloy steel
• Rail Diameter: 7 mm
• Base: Injected carbon
• Weight — 143 mm: 213 g
• Weight — 153 mm: 215 g
• Nose Width: 40 mm
• Pressure Relief: PAS (Perineal Area System) central channel
• Surface Technology: 3D Slide Control
• Padding — 143 mm: Increased cushioning optimized for gravel use
• Padding — 153 mm: Increased rear foam padding for additional support and comfort
• Color: Anthracite
• 143 mm: Compact performance fit
• 153 mm: Wider platform for greater weight distribution and long-distance comfort