pulley wheels for sram 11sDelivery in 5 10 business days (EU) Finance available at checkout with humm by flexifi. Regardless of which SRAM 11 speed rear derailleur you have, it will work better with the CeramicSpeed Pulleys. Our 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. There are three choices for SRAM. The first is our Standard: machined