Regardless of which SRAM 11-speed rear derailleur you have, it will work better with the CeramicSpeed Pulleys. Sram pulley wheels reduce drivetrain friction and increase bearing life. The CeramicSpeed Pulley Wheels are designed to work with less drag, putting more of your power into propulsion.Titanium pulley wheels are specially designed to reduce friction to an absolute minimum, virtually eliminating the drag associated with standard pulley wheels. The special design helps guide the chain in its ideal line and perform super smooth shifting.Features:TitaniumCoated ceramic bearingsLongevity, 3-5 times longer than steel bearings
