CERAMICSPEED OSPW Aero Alpha Shimano 9250/8150 derrailleur cage

The CeramicSpeed OSPW Aero ALPHA system for Shimano 9250/8150 derailleurs updates the fastest proven aero derailleur cage to include our 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. Features: - Reduces aerodynamic drag on the rear derailleur by up to 60% - Reduces friction by 35-40% over stock pulley configuration - Structural aerodynamic cage design - ALPHA Disc pulleys with composite teeth for quiet performance and ADR bearing protection Specifications: - Pulley Material: Aluminium - Derailleur Brand: Shimano - Derailleur Model: Dura Ace RD-9250 and Ultegra RD-8150 In the box: - Complete OSPW Aero ALPHA for Shimano 9250/8150 system