Prologo Proxim W450 Performance Saddle - Tirox Black 155 mmPrologo Proxim W450 Performance Saddle Tirox Black 155 mm. The Prologo Proxim W450 is a versatile saddle suitable for many uses and disciplines. In the central area the active foams and the central groove guarantee stability and comfort by dissipating the pressures along the whole surface of the saddle. The closure of the prostate zone also offers better protection of genital areas in extreme climatic conditions."E bike specific but an all terrain and