Which ferrules should I use for my SRAM Eagle cable housing? We advise that you use aluminum ferrules. Plastic endcaps have excessive flex, which can affect shifting performance. Related articles How do I change the cable on my SRAM Eagle shifter? How do I set up my SRAM Eagle rear derailleur correctly? Is there an oval chainring option for the SRAM Eagle drivetrain? How do I use my shifter's barrel adjusters to improve shifting on my SRAM Eagle derailleur? Is the cage on my SRAM Eagle rear derailleur replaceable?