As long as your 9-10 speed SRAM rear derailleur is still working, improve its performance with pulleys that reduce mechanical friction and increase bearing life. You'll go faster with the same effort. Whether you have a 9 or 10 speed SRAM rear derailleur, we have three alternatives. The first are our CNC-machined aluminum pulleys with our standard CeramicSpeed balls in hardened steel cages; our Standard Bearings. These spin with less friction than anything on the market. The second option are CNC-machined titanium pulleys with our Standard Bearings. The third are CNC-machined titanium pulleys with our standard CeramicSpeed balls installed in coated hardened steel cages; our Coated Bearings. Learn more about the advantage of our CeramicSpeed Coated Bearings here. Compatible with all 9-10 speed SRAM derailleurs. Package includes: 2 x 11-tooth pulleys UFO TECH BEARING OIL 15ml dropper bottle for pulleys Sticker