Prologo Dimension Tri CPC Triathlon Tirox Grey/Black 245mmx143mm 223gPrologo Dimension Tri CPC Saddle Tirox Black 143 mm. Dimension Tri is a saddle born for triathlon and time trial user improving comfort in all pedaling phases thanks to the ergonomic V SHAPE shape. Along with the PAS channel these devices guarantee a better blood flow eliminating numbness and excessive pressure. With CPC technology slipping is also eliminated improving the stability of the athlete and guaranteeing better aerodynamics. Multicategory