Prologo Scratch M5 PAS 3D Tirox Saddle

The Prologo Scratch M5 PAS 3D Tirox Saddle combines Prologo's 3D-printed cover with a long-fiber carbon base and Tirox alloy steel rails. Rather than a single foam layer, the cover is built in separate zones on each side, with double upper and lower layers set to different densities and elastic coefficients, so the saddle flexes independently across the nose, wings, and rear depending on where pressure lands through the pedal stroke.

The nose carries Prologo's PAS cutout — a Perineal Area System channel designed to relieve pressure on soft tissue over long rides. The base is injected long-fiber carbon, chosen for its balance of rigidity and comfort rather than pure stiffness. Tirox rails are alloy steel, which trades a little weight against Prologo's carbon-and-kevlar Nack option for noticeably better vibration absorption on rough pavement — the right call for road riders logging real mileage rather than chasing grams. The Scratch M5 comes in 140mm and 147mm widths at 250mm length, so riders can match sit-bone width without changing the saddle's shape or padding zones. For anyone who's dialed in Prologo's fit but wants a firmer platform with a touch more give over chip seal and rough tarmac, this is the road saddle to build around.