Prologo Dimension R2 Tirox Saddle Antracite/Black

The Dimension R2 represents Prologo's pinnacle ergonomic offering within their acclaimed Dimension lineup. This versatile 245x143 mm saddle delivers refined performance across road, gravel, and cross-country mountain biking disciplines. Built for competitive cyclists and serious riders who demand superior comfort without compromise, it combines precision engineering with premium materials. The compact design optimizes power transfer while maintaining the ergonomic support that defines the Dimension family's reputation for excellence.

Prologo's relentless refinement of ergonomic design and material innovation culminates in the Dimension R2—the lightest iteration of this proven platform to date. At a mere 135 grams, this saddle sheds 13% of the weight carried by its predecessor, the Dimension 143, without sacrificing the performance characteristics that have established the range as an industry benchmark. The result is an elite-level component engineered for riders who refuse to compromise on either comfort or weight savings.

Anatomical Shape

The Dimension R2's V-shaped geometry constrains lateral movement and locks riders into optimal positioning. Its anteriorly-positioned anatomical center enables a forward seating posture, while the flattened profile encourages an aggressive, aerodynamic riding position—particularly suited to cyclists with superior pelvic mobility. This design philosophy prioritizes precision alignment and dynamic control for performance-oriented applications.

Technologies

The Dimension R2 introduces a refined nose geometry measuring 40 mm—a 6% expansion from its predecessor—with enhanced side contouring to elevate comfort during sustained high-intensity efforts. The integrated PAS (Perineal Area System) features an open central channel that mitigates pressure concentration and alleviates numbness through improved circulatory support. Advanced EVA foam formulation enabled a 20% reduction in rear padding thickness without sacrificing structural integrity or comfort characteristics, delivering measurable weight savings alongside performance gains.

Base and Rails

Rail construction options cater to distinct performance priorities: Nack (Nano Carbon Fiber) combines carbon fiber, Kevlar, and aluminum for maximum rigidity and minimal mass, while Tirox (light alloy steel) prioritizes vibration damping and superior strength-to-weight efficiency. Both variants employ carbon fiber bases—long-fiber construction for Nack, injection-molded for Tirox—establishing a material hierarchy that balances structural stiffness with ride compliance across the platform.

KEY FEATURES

• Size: 245x143 mm
• Weight (with Nack rail): 135 gr
• Weight (with Tirox rail): 171 gr
• V-shape and flat profile
• Wider nose: 40 mm
• Rear padding reduced by 20%
• PAS perineal channel to relieve pressure peaks
• Long-fiber carbon base
• Nack rail (carbon fiber, Kevlar, and aluminum filaments) or Tirox (light alloy steel)