Tiro X Rail Rail light-alloy steel, this material is highly resistant to traction, & torsion for its light weight it’s for these reasons it is used in used in the aviation & aerospace industry. Tiro X then turns out to be a rail with a good balance between weight & strength, that doesn’t fear the normal stress that addresses a bicycle. Side Protection System The Smart solution to protect the sides of the saddle. It protects the saddle when the bike is leant against a wall or a tree, avoiding scratches on the cover. Connect Power Control Prologo’s patented name for these new saddles featuring dense bunches of short, suction cup like gel polymer tubes. This technology has been used in Moto GP & Formula 1, largely in gloves for the racers, but Prologo are the only ones to use it in cycling.