Regardless of which SRAM 11-speed rear derailleur you own, it will perform better with CeramicSpeed pulleys. Our pulleys reduce drivetrain friction and increase bearing life. CeramicSpeed Pulleys are engineered to run with less resistance, converting more of your power into propulsion. For SRAM there are three choices. The first is our Standard: machined aluminum pulleys with our standard CeramicSpeed balls installed in hardened steel cages. These outperform the competition in testing. The second is to take those Standard Bearings and install them in machined titanium pulleys. The third are those same machined titanium pulleys with our CeramicSpeed Balls installed in Coated hardened steel cages. Learn more about the advantage of our coated bearings here. They are compatible with all SRAM 11-speed derailleurs, mechanical and electronic. In the package: 2 x 11-tooth pulleys UFO TECH BEARING OIL 15ml dropper bottle for pulley Decal