prologo mtb sattel Scratch M5 - Big Ó Collection

Scratch M5 Big Ó is the Team Edition version of the iconic round-shaped, T-shape multidisciplinary saddle. Thanks to its innovative technologies in terms of dimensions, shape, and ergonomics, this saddle is loved by both professional riders and demanding amateurs seeking the ideal combination of comfort and high performance.

The Scratch M5, featuring Nack rails and the prominent Big Ó logo on the saddle cover, is the saddle of choice for top WorldTour athletes such as Italian Alberto Bettiol (XDS Astana) and British climber Simon Yates (Visma | Lease a Bike).

Its compact dimensions (250 x 140 mm) and extremely low weight (153 grams in the Nack version) make it a unisex saddle, perfectly suited for road cycling as well as gravel, Cross-Country, and Marathon mountain biking.

Anatomical Shape

The T-shape design provides greater freedom of movement thanks to a wider seating area. The rear-positioned anatomical center allows the rider to easily change position and take advantage of the full saddle length. The round anatomical shape of the Scratch M5 offers extra lumbar support, helping maintain a stable position even for cyclists with reduced pelvic mobility.

Technologies

The MSS – Multi Sector System, developed in collaboration with the Politecnico di Milano, improves both comfort and performance. Its individually active foam pads create 5 separate zones that work intelligently and independently, supporting the natural pedaling motion in both the push and pull phases.

The innovative Active Base technology features a perforated base covered with light padding, helping eliminate pressure peaks in the pelvic-genital area. Additionally, the closed prostate area ensures better protection of sensitive zones in extreme weather conditions (rain or mud).

Base and Rails

The long-fiber carbon base and the Nack rail (Nano Carbon Fiber) make the saddle even lighter, stiffer, and extremely high-performing, while still ensuring optimal comfort.

Technical Specifications

• Size: 250 x 140 mm
• Weight with Nack rail: 153 gr
• T-shape and round profile
• Multi Sector System to match rider morphology
• Active Base System for pressure relief and added comfort
• Long-fiber carbon base
• Rail in Nack: carbon fiber, Kevlar, and aluminum filaments.