SPECIALIZED Sirrus LTD Pro CNC Rear Gear Mech Hanger CC1092
Sirrus LTD - 2012-2013. Sirrus LTD/Pro - 2007-2011. (a) Your existing hanger, back and front, preferably having removed from your bike & rear derailleur, OR. (b) A picture of the "cut out" where the hanger sits.