CeramicSpeed OSPW X Pulley Wheel System SRAM Eagle AXS - Coated Races Alloy Pulley Carbon Cage Turqoise/Silver CerakoteCeramicSpeed OSPW X Pulley Wheel System for SRAM Eagle AXS Coated Races Alloy Pulley Carbon Cage Turqoise Silver Cerakote. The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low friction bearings and unique overall design. Features a 14 tooth upper and 18 tooth lower aluminum pulley wheels with Grade 3 Silicon Nitride balls to provide absolute optimization of the