{"product_id":"prologo-nago-r4-pas-agx-tirox-137mm-saddle","title":"Prologo Nago R4 PAS AGX Tirox Saddle 137mm – Anthracite\/Black.","description":"\u003ch3\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\u003ca href=\"https:\/\/lifobikes.com\/collections\/prologo\" rel=\"noopener\" target=\"_blank\" title=\"Prologo Collection at LafoBikes\"\u003ePrologo\u003c\/a\u003e  \u003cstrong\u003eNago R4 PAS AGX – Race-Level Gravel Performance with Added Control and Comfort.\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe Prologo Nago R4 PAS AGX is a high-performance gravel saddle developed for riders who demand race-level efficiency without sacrificing comfort and control on rough terrain. Measuring a compact 245 × 137mm, it combines Prologo's semi-round T-shape geometry with increased dual-density padding, 3D Slide Control, the Multi Sector System, and a wide PAS pressure-relief channel.\u003c\/p\u003e\n\u003cp\u003eDeveloped in collaboration with elite gravel athletes, the AGX platform is designed for competitive gravel and cyclocross racing, long-distance bikepacking, mixed-surface adventures, and riders who want additional comfort even when transitioning between pavement and dirt. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAGX Technology – Built for Gravel, Cyclocross and Mixed Terrain\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAGX stands for \u003cstrong\u003eAdventure, Gravel and Cyclocross\u003c\/strong\u003e, Prologo's platform specifically engineered for riding conditions where terrain, traction, and vibration are constantly changing.\u003c\/p\u003e\n\u003cp\u003eThe Nago R4 PAS AGX features \u003cstrong\u003e2mm more padding\u003c\/strong\u003e than the standard Nago R4, using advanced dual-density foam to improve shock and vibration absorption while maintaining the firm support required for efficient power transfer. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eT-Shape Geometry – Freedom to Move\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Nago R4 PAS AGX uses Prologo's traditional \u003cstrong\u003eT-shape design\u003c\/strong\u003e, creating a broad rear support area while leaving the rider free to move forward and backward across the saddle.\u003c\/p\u003e\n\u003cp\u003eIts recessed anatomical center makes it easier to change riding position using the full 245mm saddle length — particularly useful during steep climbs, accelerations, technical terrain, and prolonged seated efforts.\u003c\/p\u003e\n\u003cp\u003eThe semi-round profile also provides additional lumbar support and helps maintain a stable riding position across changing terrain. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3D Slide Control – Increased Grip and Stability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrologo's \u003cstrong\u003e3D Slide Control\u003c\/strong\u003e technology uses a textured saddle surface to improve grip between the rider and the saddle.\u003c\/p\u003e\n\u003cp\u003eOn loose gravel, rough trails, and repeated changes in gradient, this additional grip helps reduce unwanted movement and allows the rider to maintain a more stable and efficient position through the pedal stroke. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMulti Sector System – Independent Zones for Better Support\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Nago R4 PAS AGX incorporates Prologo's \u003cstrong\u003eMulti Sector System\u003c\/strong\u003e, dividing the saddle into mapped, independent zones with different foam characteristics.\u003c\/p\u003e\n\u003cp\u003eEach section can respond independently to the rider's position and pressure distribution, helping the saddle adapt to changing terrain and riding positions while balancing support, comfort, and pedaling efficiency. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWide PAS Channel – Pressure Relief Where It Matters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe central \u003cstrong\u003ePAS – Perineal Area System\u003c\/strong\u003e channel is wider on the AGX model and designed to reduce pressure peaks on soft tissue, tendons, and blood vessels.\u003c\/p\u003e\n\u003cp\u003eBy relieving pressure through the center of the saddle and promoting better blood circulation, the PAS system helps reduce numbness and discomfort during extended periods in the saddle — especially important on long gravel rides where repeated vibration can amplify pressure points. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTirox Rails – Strength, Comfort and Vibration Absorption\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis version uses Prologo's \u003cstrong\u003eTirox rail\u003c\/strong\u003e, manufactured from lightweight alloy steel.\u003c\/p\u003e\n\u003cp\u003eTirox offers an excellent balance between weight, strength, and compliance. Compared with Prologo's Nack carbon rail, Tirox provides greater vibration absorption, making it particularly well suited to gravel and mixed-surface riding.\u003c\/p\u003e\n\u003cp\u003eThe Tirox version is paired with an \u003cstrong\u003einjected-carbon base\u003c\/strong\u003e, engineered to provide efficient support while maintaining enough compliance for rough terrain. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e137mm Performance Fit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAt just \u003cstrong\u003e137mm wide\u003c\/strong\u003e, the Nago R4 PAS AGX is a relatively narrow performance saddle designed for riders who do not require a particularly wide sit-bone support area.\u003c\/p\u003e\n\u003cp\u003eIts compact \u003cstrong\u003e245mm length\u003c\/strong\u003e also allows riders to adopt an aggressive forward position without the excessive nose length found on traditional saddles. \u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIntended Use: Gravel \/ Cyclocross \/ All-Road \/ Bikepacking\u003c\/li\u003e\n\u003cli\u003eSize: \u003cstrong\u003e245 × 137 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight: \u003cstrong\u003e197 g\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eShape: T-Shape\u003c\/li\u003e\n\u003cli\u003eProfile: Semi-round\u003c\/li\u003e\n\u003cli\u003eRail: \u003cstrong\u003eTirox lightweight alloy steel\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBase: Injected carbon\u003c\/li\u003e\n\u003cli\u003ePadding: Dual-density foam\u003c\/li\u003e\n\u003cli\u003ePadding Increase: \u003cstrong\u003e+2 mm versus standard Nago R4\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePressure Relief: PAS – Perineal Area System\u003c\/li\u003e\n\u003cli\u003eSurface Technology: 3D Slide Control\u003c\/li\u003e\n\u003cli\u003eConstruction: Multi Sector System\u003c\/li\u003e\n\u003cli\u003eWidth: 137 mm\u003c\/li\u003e\n\u003cli\u003eLength: 245 mm\u003c\/li\u003e\n\u003cli\u003eColor: Anthracite \/ Black\u003c\/li\u003e\n\u003cli\u003eProduct Code: PRO-NAPXTN3ABX5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Prologo","offers":[{"title":"Default Title","offer_id":42665110732846,"sku":"PRO-NAPXTN3ABX5","price":222.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1336\/3759\/files\/38035.jpg?v=1788455622","url":"https:\/\/lifobikes.com\/en-ca\/products\/prologo-nago-r4-pas-agx-tirox-137mm-saddle","provider":"LafoBikes","version":"1.0","type":"link"}