Pinarello Most Rear Derailleur Hanger Direct Mount Thru Axle Disc AmFeatures The Pinarello Direct Mount Disc Drake Derailleur hanger is a replaceable component that connects the rear derailleur to the bicycle frame Its primary function is to protect the frame and derailleur from damage in the event of an impact. The "Direct Mount" designation indicates that it is designed for use with direct mount rear derailleurs, which offer increased stiffness and shifting precision Specification Material Aluminium 6080 Technology