Buying Your Derailleur Hanger is As Easy as 1-2-3! Select Your Bike Manufacturer Select Your Bike Model Add the Hanger to Your Cart! We also sell derailleur hanger extenders! Derailleur hanger extenders attach to the end of a rear derailleur hanger to allow use of large cogs on the rear cassette. Large rear cogs make it easier to ride up steep hills. Please go to our “Hanger Extenders” page to vie