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he CeramicSpeed OSPW Aero ALPHA system for SRAM Red D1/E1 and Force D1 AXS rear derailleurs updates the fastest proven aero derailleur cage to include the CeramicSpeed's 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.This version 2 system is compatible with both SRAM RED D1/E1 and Force D1 AXS rear derailleurs with or without the newly added spring tension holes Injection Molded Carbon Fiber reinforced PA Aero cage reduces aerodynamic drag on the rear derailleur by up to 60% and offers new levels of strength and durability Alpha disc pulleys are paired with a composite narrow-wide tooth profile to help prevent debris from external objects getting stuck The 15-tooth upper and 19-tooth lower Alpha pulley wheels feature ADR bearing protection that completely encloses the bearings This OSPW System has handbuilt CeramicSpeed bearings installed in each pulley and feartures Grade 3 Silicon Nitride ball bearings that are 400% smoother 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry 2 customizable spring tension settings for optimal setup It is not possible to add these pulleys to a previous generation OSPW Aero cage
| Largest Cog | 36 |
| Fits Model | Red D1/E1 and Force D1 |
| Fits Brand | SRAM |
| Drivetrain Speeds | 12 |
| Defined Color | Black |
| Title | Default Title |