CeramicSpeed OSPW Aero Derailleur Pulley System - Alpha Disc | for Shimano Dura Ace/Ultegra Di2 (R9250/R8150)

The CeramicSpeed OSPW Aero ALPHA system for Shimano 9250/8150 derailleurs updates the fastest proven aero derailleur cage to include CeramicSpeed patent pending ADR bearing protection and quiet performing ALPHA disc with composite tooth profile pulleys. Furthermore, a speed defying pinstripe graphic has been added for a splash of visual motion. The OSPW Aero ALPHA cages have been updated to accommodate the ADR equipped ALPHA disc pulleys. It is not possible to add these pulleys to a previous gereration OSPW Aero cage. Unique Product Features of the CeramicSpeed OSPW Aero Alpha System Proven in the wind tunnel with Drag2Zero Structural aerodynamic cage design Pulleys, cages, and bearings all produced and assembled by hand in Denmark ALPHA Disc pulleys with composite teeth for quiet performance and ADR bearing protection Full lifetime warranty on both cage and pulleys In the box: Complete OSPW Aero ALPHA for SRAM Red/Force AXS system