- Updates the fastest proven aero derailleur cage to include patent pending ADR bearing protection and quiet performing ALPHA disc with composite tooth profile pulleys
- Pinstripe graphic has been added for a splash of visual motion
- OSPW Aero ALPHA cages have been updated to accommodate the ADR equipped ALPHA disc pulleys
- Reduces aerodynamic drag on the rear derailleur by up to 60%
- Reduces friction by 35-40% over stock pulley configuration
- 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
- It is not possible to add these pulleys to a previous generation OSPW Aero cage
Model: OSPW Aero ALPHA
Compatibility: Shimano 9250/8150
Upper/Lower: 13/19t
Color: Black
- Pinstripe graphic has been added for a splash of visual motion
- OSPW Aero ALPHA cages have been updated to accommodate the ADR equipped ALPHA disc pulleys
- Reduces aerodynamic drag on the rear derailleur by up to 60%
- Reduces friction by 35-40% over stock pulley configuration
- 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
- It is not possible to add these pulleys to a previous generation OSPW Aero cage
Model: OSPW Aero ALPHA
Compatibility: Shimano 9250/8150
Upper/Lower: 13/19t
Color: Black
